Ubuntu update for linux

Published: 2022-05-18 | Updated: 2022-06-02

Risk	High
Patch available	YES
Number of vulnerabilities	6
CVE-ID	CVE-2020-27820 CVE-2021-39713 CVE-2021-4157 CVE-2022-26490 CVE-2022-27223 CVE-2022-28390
CWE-ID	CWE-416 CWE-254 CWE-119 CWE-129 CWE-415
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Ubuntu Operating systems & Components / Operating system linux-image-virtual-lts-xenial (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-lowlatency-lts-xenial (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-generic-lts-xenial (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-4.4.0-224-generic (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-4.4.0-1140-aws (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-1105-kvm (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-224-lowlatency (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-aws (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-virtual (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 6 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU63322

Risk: Low

CVSSv3.1: 4.1 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-27820

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error in nouveau's postclose() handler. 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: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.224.231

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.224.231

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.224.231

linux-image-lowlatency (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-224-generic (Ubuntu package): before 4.4.0.224.231

linux-image-kvm (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-1140-aws (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-1105-kvm (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-224-lowlatency (Ubuntu package): before 4.4.0.224.231

linux-image-aws (Ubuntu package): before 4.4.0.224.231

linux-image-generic (Ubuntu package): before 4.4.0.224.231

linux-image-virtual (Ubuntu package): before 4.4.0.224.231

CPE2.3

External links

http://ubuntu.com/security/notices/USN-5413-1

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) Security features bypass

EUVDB-ID: #VU63350

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-39713

CWE-ID: CWE-254 - Security Features

Exploit availability: No

Description

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

The vulnerability exists due to multiple issues in Qdisc implementation related to rcu read lock. A local application can execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.224.231

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.224.231

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.224.231

linux-image-lowlatency (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-224-generic (Ubuntu package): before 4.4.0.224.231

linux-image-kvm (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-1140-aws (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-1105-kvm (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-224-lowlatency (Ubuntu package): before 4.4.0.224.231

linux-image-aws (Ubuntu package): before 4.4.0.224.231

linux-image-generic (Ubuntu package): before 4.4.0.224.231

linux-image-virtual (Ubuntu package): before 4.4.0.224.231

CPE2.3

External links

http://ubuntu.com/security/notices/USN-5413-1

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) Buffer overflow

EUVDB-ID: #VU63323

Risk: High

CVSSv3.1: 7 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-4157

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the Linux kernel NFS subsystem. A remote attacker can create a specially crafted data and crash the system or escalate privileges on the system

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.224.231

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.224.231

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.224.231

linux-image-lowlatency (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-224-generic (Ubuntu package): before 4.4.0.224.231

linux-image-kvm (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-1140-aws (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-1105-kvm (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-224-lowlatency (Ubuntu package): before 4.4.0.224.231

linux-image-aws (Ubuntu package): before 4.4.0.224.231

linux-image-generic (Ubuntu package): before 4.4.0.224.231

linux-image-virtual (Ubuntu package): before 4.4.0.224.231

CPE2.3

External links

http://ubuntu.com/security/notices/USN-5413-1

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

4) Buffer overflow

EUVDB-ID: #VU62601

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-26490

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error within the st21nfca_connectivity_event_received() function in drivers/nfc/st21nfca/se.c in Linux kernel. A local user can run a specially crafted program to trigger buffer overflow and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.224.231

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.224.231

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.224.231

linux-image-lowlatency (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-224-generic (Ubuntu package): before 4.4.0.224.231

linux-image-kvm (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-1140-aws (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-1105-kvm (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-224-lowlatency (Ubuntu package): before 4.4.0.224.231

linux-image-aws (Ubuntu package): before 4.4.0.224.231

linux-image-generic (Ubuntu package): before 4.4.0.224.231

linux-image-virtual (Ubuntu package): before 4.4.0.224.231

CPE2.3

External links

http://ubuntu.com/security/notices/USN-5413-1

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) Improper Validation of Array Index

EUVDB-ID: #VU63316

Risk: Medium

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-27223

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

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code with elevated privileges.

The vulnerability exists due to improper validation of array index in drivers/usb/gadget/udc/udc-xilinx.c in the Linux kernel. A remote attacker 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: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.224.231

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.224.231

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.224.231

linux-image-lowlatency (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-224-generic (Ubuntu package): before 4.4.0.224.231

linux-image-kvm (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-1140-aws (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-1105-kvm (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-224-lowlatency (Ubuntu package): before 4.4.0.224.231

linux-image-aws (Ubuntu package): before 4.4.0.224.231

linux-image-generic (Ubuntu package): before 4.4.0.224.231

linux-image-virtual (Ubuntu package): before 4.4.0.224.231

CPE2.3

External links

http://ubuntu.com/security/notices/USN-5413-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

6) Double Free

EUVDB-ID: #VU63164

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-28390

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

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

The vulnerability exists due to boundary error in ems_usb_start_xmit in drivers/net/can/usb/ems_usb.c. A local user can pass specially crafted data to the application, trigger double free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.224.231

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.224.231

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.224.231

linux-image-lowlatency (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-224-generic (Ubuntu package): before 4.4.0.224.231

linux-image-kvm (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-1140-aws (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-1105-kvm (Ubuntu package): before 4.4.0.224.231

linux-image-4.4.0-224-lowlatency (Ubuntu package): before 4.4.0.224.231

linux-image-aws (Ubuntu package): before 4.4.0.224.231

linux-image-generic (Ubuntu package): before 4.4.0.224.231

linux-image-virtual (Ubuntu package): before 4.4.0.224.231

CPE2.3

External links

http://ubuntu.com/security/notices/USN-5413-1

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.