Ubuntu update for linux



| Updated: 2022-10-23
Risk Medium
Patch available YES
Number of vulnerabilities 7
CVE-ID CVE-2021-20321
CVE-2021-3760
CVE-2021-4002
CVE-2021-41864
CVE-2021-43056
CVE-2021-43267
CVE-2021-43389
CWE-ID CWE-362
CWE-416
CWE-401
CWE-787
CWE-252
CWE-119
CWE-129
Exploitation vector Local network
Public exploit Public exploit code for vulnerability #6 is available.
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

linux-image-raspi (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-generic-64k-hwe-20.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-generic-lpae-hwe-20.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-virtual-hwe-20.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-generic-hwe-20.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-lowlatency-hwe-20.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.11.0-44-generic (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.11.0-1021-kvm (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.11.0-44-generic-lpae (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.11.0-1023-aws (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.11.0-44-lowlatency (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.11.0-1023-azure (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.11.0-44-generic-64k (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.11.0-1024-raspi-nolpae (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.11.0-1023-oracle (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.11.0-1024-gcp (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.11.0-1024-raspi (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.13.0-1012-raspi (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-lowlatency (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.13.0-1007-kvm (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-generic-lpae (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.13.0-1009-azure (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-gke (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.13.0-23-generic-64k (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-oracle (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.13.0-1012-raspi-nolpae (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-gcp (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-kvm (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.13.0-23-lowlatency (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-oem-20.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-raspi-nolpae (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.13.0-1011-oracle (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-azure (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.13.0-1008-gcp (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.13.0-23-generic (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.13.0-1008-aws (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.13.0-23-generic-lpae (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-generic (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-generic-64k (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-virtual (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-aws (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 7 vulnerabilities.

1) Race condition

EUVDB-ID: #VU59084

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-20321

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attacks.

The vulnerability exists due to a race condition when accessing file object in the Linux kernel OverlayFS subsystem. A local user can rename files in specific way with OverlayFS and perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 21.10

linux-image-raspi (Ubuntu package): before 5.11.0.1024.22

linux-image-generic-64k-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-generic-lpae-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-virtual-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-generic-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-lowlatency-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-5.11.0-44-generic (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1021-kvm (Ubuntu package): before 5.11.0-1021.23

linux-image-5.11.0-44-generic-lpae (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1023-aws (Ubuntu package): before 5.11.0-1023.24~20.04.1

linux-image-5.11.0-44-lowlatency (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1023-azure (Ubuntu package): before 5.11.0-1023.24~20.04.1

linux-image-5.11.0-44-generic-64k (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1024-raspi-nolpae (Ubuntu package): before 5.11.0-1024.26

linux-image-5.11.0-1023-oracle (Ubuntu package): before 5.11.0-1023.24~20.04.1

linux-image-5.11.0-1024-gcp (Ubuntu package): before 5.11.0-1024.26~20.04.1

linux-image-5.11.0-1024-raspi (Ubuntu package): before 5.11.0-1024.26

linux-image-5.13.0-1012-raspi (Ubuntu package): before 5.13.0-1012.14

linux-image-lowlatency (Ubuntu package): before 5.11.0.44.44

linux-image-5.13.0-1007-kvm (Ubuntu package): before 5.13.0-1007.7

linux-image-generic-lpae (Ubuntu package): before 5.11.0.44.44

linux-image-5.13.0-1009-azure (Ubuntu package): before 5.13.0-1009.10

linux-image-gke (Ubuntu package): before 5.11.0.1024.24

linux-image-5.13.0-23-generic-64k (Ubuntu package): before 5.13.0-23.23

linux-image-oracle (Ubuntu package): before 5.11.0.1023.24~20.04.16

linux-image-5.13.0-1012-raspi-nolpae (Ubuntu package): before 5.13.0-1012.14

linux-image-gcp (Ubuntu package): before 5.11.0.1024.24

linux-image-kvm (Ubuntu package): before 5.11.0.1021.22

linux-image-5.13.0-23-lowlatency (Ubuntu package): before 5.13.0-23.23

linux-image-oem-20.04 (Ubuntu package): before 5.11.0.44.44

linux-image-raspi-nolpae (Ubuntu package): before 5.11.0.1024.22

linux-image-5.13.0-1011-oracle (Ubuntu package): before 5.13.0-1011.13

linux-image-azure (Ubuntu package): before 5.11.0.1023.24~20.04.23

linux-image-5.13.0-1008-gcp (Ubuntu package): before 5.13.0-1008.9

linux-image-5.13.0-23-generic (Ubuntu package): before 5.13.0-23.23

linux-image-5.13.0-1008-aws (Ubuntu package): before 5.13.0-1008.9

linux-image-5.13.0-23-generic-lpae (Ubuntu package): before 5.13.0-23.23

linux-image-generic (Ubuntu package): before 5.11.0.44.44

linux-image-generic-64k (Ubuntu package): before 5.11.0.44.44

linux-image-virtual (Ubuntu package): before 5.11.0.44.44

linux-image-aws (Ubuntu package): before 5.11.0.1023.24~20.04.23

CPE2.3 External links

https://ubuntu.com/security/notices/USN-5208-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Use-after-free

EUVDB-ID: #VU63816

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-3760

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in the NFC stack. A local user can trigger use-after-free error to escalate privileges on the system.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 21.10

linux-image-raspi (Ubuntu package): before 5.11.0.1024.22

linux-image-generic-64k-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-generic-lpae-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-virtual-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-generic-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-lowlatency-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-5.11.0-44-generic (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1021-kvm (Ubuntu package): before 5.11.0-1021.23

linux-image-5.11.0-44-generic-lpae (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1023-aws (Ubuntu package): before 5.11.0-1023.24~20.04.1

linux-image-5.11.0-44-lowlatency (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1023-azure (Ubuntu package): before 5.11.0-1023.24~20.04.1

linux-image-5.11.0-44-generic-64k (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1024-raspi-nolpae (Ubuntu package): before 5.11.0-1024.26

linux-image-5.11.0-1023-oracle (Ubuntu package): before 5.11.0-1023.24~20.04.1

linux-image-5.11.0-1024-gcp (Ubuntu package): before 5.11.0-1024.26~20.04.1

linux-image-5.11.0-1024-raspi (Ubuntu package): before 5.11.0-1024.26

linux-image-5.13.0-1012-raspi (Ubuntu package): before 5.13.0-1012.14

linux-image-lowlatency (Ubuntu package): before 5.11.0.44.44

linux-image-5.13.0-1007-kvm (Ubuntu package): before 5.13.0-1007.7

linux-image-generic-lpae (Ubuntu package): before 5.11.0.44.44

linux-image-5.13.0-1009-azure (Ubuntu package): before 5.13.0-1009.10

linux-image-gke (Ubuntu package): before 5.11.0.1024.24

linux-image-5.13.0-23-generic-64k (Ubuntu package): before 5.13.0-23.23

linux-image-oracle (Ubuntu package): before 5.11.0.1023.24~20.04.16

linux-image-5.13.0-1012-raspi-nolpae (Ubuntu package): before 5.13.0-1012.14

linux-image-gcp (Ubuntu package): before 5.11.0.1024.24

linux-image-kvm (Ubuntu package): before 5.11.0.1021.22

linux-image-5.13.0-23-lowlatency (Ubuntu package): before 5.13.0-23.23

linux-image-oem-20.04 (Ubuntu package): before 5.11.0.44.44

linux-image-raspi-nolpae (Ubuntu package): before 5.11.0.1024.22

linux-image-5.13.0-1011-oracle (Ubuntu package): before 5.13.0-1011.13

linux-image-azure (Ubuntu package): before 5.11.0.1023.24~20.04.23

linux-image-5.13.0-1008-gcp (Ubuntu package): before 5.13.0-1008.9

linux-image-5.13.0-23-generic (Ubuntu package): before 5.13.0-23.23

linux-image-5.13.0-1008-aws (Ubuntu package): before 5.13.0-1008.9

linux-image-5.13.0-23-generic-lpae (Ubuntu package): before 5.13.0-23.23

linux-image-generic (Ubuntu package): before 5.11.0.44.44

linux-image-generic-64k (Ubuntu package): before 5.11.0.44.44

linux-image-virtual (Ubuntu package): before 5.11.0.44.44

linux-image-aws (Ubuntu package): before 5.11.0.1023.24~20.04.23

CPE2.3 External links

https://ubuntu.com/security/notices/USN-5208-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Memory leak

EUVDB-ID: #VU63836

Risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-4002

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due memory leak in the Linux kernel's hugetlbfs memory usage. A local user can force the application to leak memory and gain access to sensitive information.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 21.10

linux-image-raspi (Ubuntu package): before 5.11.0.1024.22

linux-image-generic-64k-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-generic-lpae-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-virtual-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-generic-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-lowlatency-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-5.11.0-44-generic (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1021-kvm (Ubuntu package): before 5.11.0-1021.23

linux-image-5.11.0-44-generic-lpae (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1023-aws (Ubuntu package): before 5.11.0-1023.24~20.04.1

linux-image-5.11.0-44-lowlatency (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1023-azure (Ubuntu package): before 5.11.0-1023.24~20.04.1

linux-image-5.11.0-44-generic-64k (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1024-raspi-nolpae (Ubuntu package): before 5.11.0-1024.26

linux-image-5.11.0-1023-oracle (Ubuntu package): before 5.11.0-1023.24~20.04.1

linux-image-5.11.0-1024-gcp (Ubuntu package): before 5.11.0-1024.26~20.04.1

linux-image-5.11.0-1024-raspi (Ubuntu package): before 5.11.0-1024.26

linux-image-5.13.0-1012-raspi (Ubuntu package): before 5.13.0-1012.14

linux-image-lowlatency (Ubuntu package): before 5.11.0.44.44

linux-image-5.13.0-1007-kvm (Ubuntu package): before 5.13.0-1007.7

linux-image-generic-lpae (Ubuntu package): before 5.11.0.44.44

linux-image-5.13.0-1009-azure (Ubuntu package): before 5.13.0-1009.10

linux-image-gke (Ubuntu package): before 5.11.0.1024.24

linux-image-5.13.0-23-generic-64k (Ubuntu package): before 5.13.0-23.23

linux-image-oracle (Ubuntu package): before 5.11.0.1023.24~20.04.16

linux-image-5.13.0-1012-raspi-nolpae (Ubuntu package): before 5.13.0-1012.14

linux-image-gcp (Ubuntu package): before 5.11.0.1024.24

linux-image-kvm (Ubuntu package): before 5.11.0.1021.22

linux-image-5.13.0-23-lowlatency (Ubuntu package): before 5.13.0-23.23

linux-image-oem-20.04 (Ubuntu package): before 5.11.0.44.44

linux-image-raspi-nolpae (Ubuntu package): before 5.11.0.1024.22

linux-image-5.13.0-1011-oracle (Ubuntu package): before 5.13.0-1011.13

linux-image-azure (Ubuntu package): before 5.11.0.1023.24~20.04.23

linux-image-5.13.0-1008-gcp (Ubuntu package): before 5.13.0-1008.9

linux-image-5.13.0-23-generic (Ubuntu package): before 5.13.0-23.23

linux-image-5.13.0-1008-aws (Ubuntu package): before 5.13.0-1008.9

linux-image-5.13.0-23-generic-lpae (Ubuntu package): before 5.13.0-23.23

linux-image-generic (Ubuntu package): before 5.11.0.44.44

linux-image-generic-64k (Ubuntu package): before 5.11.0.44.44

linux-image-virtual (Ubuntu package): before 5.11.0.44.44

linux-image-aws (Ubuntu package): before 5.11.0.1023.24~20.04.23

CPE2.3 External links

https://ubuntu.com/security/notices/USN-5208-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Out-of-bounds write

EUVDB-ID: #VU63855

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-41864

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error when processing untrusted input. A local user can gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 21.10

linux-image-raspi (Ubuntu package): before 5.11.0.1024.22

linux-image-generic-64k-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-generic-lpae-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-virtual-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-generic-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-lowlatency-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-5.11.0-44-generic (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1021-kvm (Ubuntu package): before 5.11.0-1021.23

linux-image-5.11.0-44-generic-lpae (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1023-aws (Ubuntu package): before 5.11.0-1023.24~20.04.1

linux-image-5.11.0-44-lowlatency (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1023-azure (Ubuntu package): before 5.11.0-1023.24~20.04.1

linux-image-5.11.0-44-generic-64k (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1024-raspi-nolpae (Ubuntu package): before 5.11.0-1024.26

linux-image-5.11.0-1023-oracle (Ubuntu package): before 5.11.0-1023.24~20.04.1

linux-image-5.11.0-1024-gcp (Ubuntu package): before 5.11.0-1024.26~20.04.1

linux-image-5.11.0-1024-raspi (Ubuntu package): before 5.11.0-1024.26

linux-image-5.13.0-1012-raspi (Ubuntu package): before 5.13.0-1012.14

linux-image-lowlatency (Ubuntu package): before 5.11.0.44.44

linux-image-5.13.0-1007-kvm (Ubuntu package): before 5.13.0-1007.7

linux-image-generic-lpae (Ubuntu package): before 5.11.0.44.44

linux-image-5.13.0-1009-azure (Ubuntu package): before 5.13.0-1009.10

linux-image-gke (Ubuntu package): before 5.11.0.1024.24

linux-image-5.13.0-23-generic-64k (Ubuntu package): before 5.13.0-23.23

linux-image-oracle (Ubuntu package): before 5.11.0.1023.24~20.04.16

linux-image-5.13.0-1012-raspi-nolpae (Ubuntu package): before 5.13.0-1012.14

linux-image-gcp (Ubuntu package): before 5.11.0.1024.24

linux-image-kvm (Ubuntu package): before 5.11.0.1021.22

linux-image-5.13.0-23-lowlatency (Ubuntu package): before 5.13.0-23.23

linux-image-oem-20.04 (Ubuntu package): before 5.11.0.44.44

linux-image-raspi-nolpae (Ubuntu package): before 5.11.0.1024.22

linux-image-5.13.0-1011-oracle (Ubuntu package): before 5.13.0-1011.13

linux-image-azure (Ubuntu package): before 5.11.0.1023.24~20.04.23

linux-image-5.13.0-1008-gcp (Ubuntu package): before 5.13.0-1008.9

linux-image-5.13.0-23-generic (Ubuntu package): before 5.13.0-23.23

linux-image-5.13.0-1008-aws (Ubuntu package): before 5.13.0-1008.9

linux-image-5.13.0-23-generic-lpae (Ubuntu package): before 5.13.0-23.23

linux-image-generic (Ubuntu package): before 5.11.0.44.44

linux-image-generic-64k (Ubuntu package): before 5.11.0.44.44

linux-image-virtual (Ubuntu package): before 5.11.0.44.44

linux-image-aws (Ubuntu package): before 5.11.0.1023.24~20.04.23

CPE2.3 External links

https://ubuntu.com/security/notices/USN-5208-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Unchecked Return Value

EUVDB-ID: #VU63921

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-43056

CWE-ID: CWE-252 - Unchecked Return Value

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service attack.

The vulnerability exists due to an arch/powerpc/kvm/book3s_hv_rmhandlers.S implementation error when handling SRR1 register values. A local user can perform a denial of service attack, when the host is running on Power8.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 21.10

linux-image-raspi (Ubuntu package): before 5.11.0.1024.22

linux-image-generic-64k-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-generic-lpae-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-virtual-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-generic-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-lowlatency-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-5.11.0-44-generic (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1021-kvm (Ubuntu package): before 5.11.0-1021.23

linux-image-5.11.0-44-generic-lpae (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1023-aws (Ubuntu package): before 5.11.0-1023.24~20.04.1

linux-image-5.11.0-44-lowlatency (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1023-azure (Ubuntu package): before 5.11.0-1023.24~20.04.1

linux-image-5.11.0-44-generic-64k (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1024-raspi-nolpae (Ubuntu package): before 5.11.0-1024.26

linux-image-5.11.0-1023-oracle (Ubuntu package): before 5.11.0-1023.24~20.04.1

linux-image-5.11.0-1024-gcp (Ubuntu package): before 5.11.0-1024.26~20.04.1

linux-image-5.11.0-1024-raspi (Ubuntu package): before 5.11.0-1024.26

linux-image-5.13.0-1012-raspi (Ubuntu package): before 5.13.0-1012.14

linux-image-lowlatency (Ubuntu package): before 5.11.0.44.44

linux-image-5.13.0-1007-kvm (Ubuntu package): before 5.13.0-1007.7

linux-image-generic-lpae (Ubuntu package): before 5.11.0.44.44

linux-image-5.13.0-1009-azure (Ubuntu package): before 5.13.0-1009.10

linux-image-gke (Ubuntu package): before 5.11.0.1024.24

linux-image-5.13.0-23-generic-64k (Ubuntu package): before 5.13.0-23.23

linux-image-oracle (Ubuntu package): before 5.11.0.1023.24~20.04.16

linux-image-5.13.0-1012-raspi-nolpae (Ubuntu package): before 5.13.0-1012.14

linux-image-gcp (Ubuntu package): before 5.11.0.1024.24

linux-image-kvm (Ubuntu package): before 5.11.0.1021.22

linux-image-5.13.0-23-lowlatency (Ubuntu package): before 5.13.0-23.23

linux-image-oem-20.04 (Ubuntu package): before 5.11.0.44.44

linux-image-raspi-nolpae (Ubuntu package): before 5.11.0.1024.22

linux-image-5.13.0-1011-oracle (Ubuntu package): before 5.13.0-1011.13

linux-image-azure (Ubuntu package): before 5.11.0.1023.24~20.04.23

linux-image-5.13.0-1008-gcp (Ubuntu package): before 5.13.0-1008.9

linux-image-5.13.0-23-generic (Ubuntu package): before 5.13.0-23.23

linux-image-5.13.0-1008-aws (Ubuntu package): before 5.13.0-1008.9

linux-image-5.13.0-23-generic-lpae (Ubuntu package): before 5.13.0-23.23

linux-image-generic (Ubuntu package): before 5.11.0.44.44

linux-image-generic-64k (Ubuntu package): before 5.11.0.44.44

linux-image-virtual (Ubuntu package): before 5.11.0.44.44

linux-image-aws (Ubuntu package): before 5.11.0.1023.24~20.04.23

CPE2.3 External links

https://ubuntu.com/security/notices/USN-5208-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

6) Buffer overflow

EUVDB-ID: #VU58209

Risk: Medium

CVSSv4.0: 7.4 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2021-43267

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input in net/tipc/crypto.c in the Linux kernel. The Transparent Inter-Process Communication (TIPC) functionality allows remote attackers to exploit insufficient validation of user-supplied sizes for the MSG_CRYPTO message type.

A remote attacker can send specially crafted MSG_CRYPTO messages to the affected system, trigger memory corruption and execute arbitrary code on the system.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 21.10

linux-image-raspi (Ubuntu package): before 5.11.0.1024.22

linux-image-generic-64k-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-generic-lpae-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-virtual-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-generic-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-lowlatency-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-5.11.0-44-generic (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1021-kvm (Ubuntu package): before 5.11.0-1021.23

linux-image-5.11.0-44-generic-lpae (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1023-aws (Ubuntu package): before 5.11.0-1023.24~20.04.1

linux-image-5.11.0-44-lowlatency (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1023-azure (Ubuntu package): before 5.11.0-1023.24~20.04.1

linux-image-5.11.0-44-generic-64k (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1024-raspi-nolpae (Ubuntu package): before 5.11.0-1024.26

linux-image-5.11.0-1023-oracle (Ubuntu package): before 5.11.0-1023.24~20.04.1

linux-image-5.11.0-1024-gcp (Ubuntu package): before 5.11.0-1024.26~20.04.1

linux-image-5.11.0-1024-raspi (Ubuntu package): before 5.11.0-1024.26

linux-image-5.13.0-1012-raspi (Ubuntu package): before 5.13.0-1012.14

linux-image-lowlatency (Ubuntu package): before 5.11.0.44.44

linux-image-5.13.0-1007-kvm (Ubuntu package): before 5.13.0-1007.7

linux-image-generic-lpae (Ubuntu package): before 5.11.0.44.44

linux-image-5.13.0-1009-azure (Ubuntu package): before 5.13.0-1009.10

linux-image-gke (Ubuntu package): before 5.11.0.1024.24

linux-image-5.13.0-23-generic-64k (Ubuntu package): before 5.13.0-23.23

linux-image-oracle (Ubuntu package): before 5.11.0.1023.24~20.04.16

linux-image-5.13.0-1012-raspi-nolpae (Ubuntu package): before 5.13.0-1012.14

linux-image-gcp (Ubuntu package): before 5.11.0.1024.24

linux-image-kvm (Ubuntu package): before 5.11.0.1021.22

linux-image-5.13.0-23-lowlatency (Ubuntu package): before 5.13.0-23.23

linux-image-oem-20.04 (Ubuntu package): before 5.11.0.44.44

linux-image-raspi-nolpae (Ubuntu package): before 5.11.0.1024.22

linux-image-5.13.0-1011-oracle (Ubuntu package): before 5.13.0-1011.13

linux-image-azure (Ubuntu package): before 5.11.0.1023.24~20.04.23

linux-image-5.13.0-1008-gcp (Ubuntu package): before 5.13.0-1008.9

linux-image-5.13.0-23-generic (Ubuntu package): before 5.13.0-23.23

linux-image-5.13.0-1008-aws (Ubuntu package): before 5.13.0-1008.9

linux-image-5.13.0-23-generic-lpae (Ubuntu package): before 5.13.0-23.23

linux-image-generic (Ubuntu package): before 5.11.0.44.44

linux-image-generic-64k (Ubuntu package): before 5.11.0.44.44

linux-image-virtual (Ubuntu package): before 5.11.0.44.44

linux-image-aws (Ubuntu package): before 5.11.0.1023.24~20.04.23

CPE2.3 External links

https://ubuntu.com/security/notices/USN-5208-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

7) Improper Validation of Array Index

EUVDB-ID: #VU63385

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-43389

CWE-ID: CWE-129 - Improper Validation of Array Index

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code with elevated privileges.

The vulnerability exists due to improper validation of array index in the ISDN CAPI implementation within detach_capi_ctr() function in drivers/isdn/capi/kcapi.c. A local user can send specially crafted data to the system and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 21.10

linux-image-raspi (Ubuntu package): before 5.11.0.1024.22

linux-image-generic-64k-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-generic-lpae-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-virtual-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-generic-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-lowlatency-hwe-20.04 (Ubuntu package): before 5.11.0.44.48~20.04.22

linux-image-5.11.0-44-generic (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1021-kvm (Ubuntu package): before 5.11.0-1021.23

linux-image-5.11.0-44-generic-lpae (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1023-aws (Ubuntu package): before 5.11.0-1023.24~20.04.1

linux-image-5.11.0-44-lowlatency (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1023-azure (Ubuntu package): before 5.11.0-1023.24~20.04.1

linux-image-5.11.0-44-generic-64k (Ubuntu package): before 5.11.0-44.48~20.04.2

linux-image-5.11.0-1024-raspi-nolpae (Ubuntu package): before 5.11.0-1024.26

linux-image-5.11.0-1023-oracle (Ubuntu package): before 5.11.0-1023.24~20.04.1

linux-image-5.11.0-1024-gcp (Ubuntu package): before 5.11.0-1024.26~20.04.1

linux-image-5.11.0-1024-raspi (Ubuntu package): before 5.11.0-1024.26

linux-image-5.13.0-1012-raspi (Ubuntu package): before 5.13.0-1012.14

linux-image-lowlatency (Ubuntu package): before 5.11.0.44.44

linux-image-5.13.0-1007-kvm (Ubuntu package): before 5.13.0-1007.7

linux-image-generic-lpae (Ubuntu package): before 5.11.0.44.44

linux-image-5.13.0-1009-azure (Ubuntu package): before 5.13.0-1009.10

linux-image-gke (Ubuntu package): before 5.11.0.1024.24

linux-image-5.13.0-23-generic-64k (Ubuntu package): before 5.13.0-23.23

linux-image-oracle (Ubuntu package): before 5.11.0.1023.24~20.04.16

linux-image-5.13.0-1012-raspi-nolpae (Ubuntu package): before 5.13.0-1012.14

linux-image-gcp (Ubuntu package): before 5.11.0.1024.24

linux-image-kvm (Ubuntu package): before 5.11.0.1021.22

linux-image-5.13.0-23-lowlatency (Ubuntu package): before 5.13.0-23.23

linux-image-oem-20.04 (Ubuntu package): before 5.11.0.44.44

linux-image-raspi-nolpae (Ubuntu package): before 5.11.0.1024.22

linux-image-5.13.0-1011-oracle (Ubuntu package): before 5.13.0-1011.13

linux-image-azure (Ubuntu package): before 5.11.0.1023.24~20.04.23

linux-image-5.13.0-1008-gcp (Ubuntu package): before 5.13.0-1008.9

linux-image-5.13.0-23-generic (Ubuntu package): before 5.13.0-23.23

linux-image-5.13.0-1008-aws (Ubuntu package): before 5.13.0-1008.9

linux-image-5.13.0-23-generic-lpae (Ubuntu package): before 5.13.0-23.23

linux-image-generic (Ubuntu package): before 5.11.0.44.44

linux-image-generic-64k (Ubuntu package): before 5.11.0.44.44

linux-image-virtual (Ubuntu package): before 5.11.0.44.44

linux-image-aws (Ubuntu package): before 5.11.0.1023.24~20.04.23

CPE2.3 External links

https://ubuntu.com/security/notices/USN-5208-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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