Ubuntu update for linux-gke-5.15

1) Out-of-bounds write

EUVDB-ID: #VU65833

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-2021-33655

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 in FBIOPUT_VSCREENINFO IOCTL. A local user can trigger an out-of-bounds write error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux-gke-5.15 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-gke-5.15 (Ubuntu package): before 5.15.0.1016.19~20.04.1

linux-image-5.15.0-1016-gke (Ubuntu package): before 5.15.0-1016.19~20.04.1

CPE2.3

External links

https://ubuntu.com/security/notices/USN-5648-1

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: #VU65318

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-2022-2318

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error caused by timer handler in net/rose/rose_timer.c of linux. A local user can exploit the vulnerability to perform a denial of service attack.

Mitigation

Update the affected package linux-gke-5.15 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-gke-5.15 (Ubuntu package): before 5.15.0.1016.19~20.04.1

linux-image-5.15.0-1016-gke (Ubuntu package): before 5.15.0-1016.19~20.04.1

CPE2.3

External links

https://ubuntu.com/security/notices/USN-5648-1

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) Information disclosure

EUVDB-ID: #VU65345

Risk: Low

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

CVE-ID: CVE-2022-26365

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

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

The vulnerability exists due to Linux Block and Network PV device frontends don't zero memory regions before sharing them with the backend. A local user can gain unauthorized access to sensitive information on the system.

Mitigation

Update the affected package linux-gke-5.15 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-gke-5.15 (Ubuntu package): before 5.15.0.1016.19~20.04.1

linux-image-5.15.0-1016-gke (Ubuntu package): before 5.15.0-1016.19~20.04.1

CPE2.3

External links

https://ubuntu.com/security/notices/USN-5648-1

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) Information disclosure

EUVDB-ID: #VU65346

Risk: Low

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

CVE-ID: CVE-2022-33740

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

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

The vulnerability exists due to Linux Block and Network PV device frontends don't zero memory regions before sharing them with the backend. A local user can gain unauthorized access to sensitive information on the system.

Mitigation

Update the affected package linux-gke-5.15 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-gke-5.15 (Ubuntu package): before 5.15.0.1016.19~20.04.1

linux-image-5.15.0-1016-gke (Ubuntu package): before 5.15.0-1016.19~20.04.1

CPE2.3

External links

https://ubuntu.com/security/notices/USN-5648-1

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) Information disclosure

EUVDB-ID: #VU65351

Risk: Low

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

CVE-ID: CVE-2022-33741

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

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

The vulnerability exists due to granularity of the grant table doesn't allow sharing less than a 4K page, leading to unrelated data residing in the same 4K page as data shared with a backend being accessible by such backend. A local user can gain unauthorized access to sensitive information on the system.

Mitigation

Update the affected package linux-gke-5.15 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-gke-5.15 (Ubuntu package): before 5.15.0.1016.19~20.04.1

linux-image-5.15.0-1016-gke (Ubuntu package): before 5.15.0-1016.19~20.04.1

CPE2.3

External links

https://ubuntu.com/security/notices/USN-5648-1

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) Information disclosure

EUVDB-ID: #VU65348

Risk: Low

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

CVE-ID: CVE-2022-33742

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

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

The vulnerability exists due to granularity of the grant table doesn't allow sharing less than a 4K page, leading to unrelated data residing in the same 4K page as data shared with a backend being accessible by such backend. A local user can gain unauthorized access to sensitive information on the system.

Mitigation

Update the affected package linux-gke-5.15 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-gke-5.15 (Ubuntu package): before 5.15.0.1016.19~20.04.1

linux-image-5.15.0-1016-gke (Ubuntu package): before 5.15.0-1016.19~20.04.1

CPE2.3

External links

https://ubuntu.com/security/notices/USN-5648-1

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.

7) Resource management error

EUVDB-ID: #VU65841

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-33743

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a malicious network backend to perform a denial of service (DoS) attack.

The vulnerability exists due to an error in eXpress Data Path support implementation in Xen, allowing Linux netfront to use freed SKBs. A malicious network backend can cause denial of service on the guest OS.

Mitigation

Update the affected package linux-gke-5.15 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-gke-5.15 (Ubuntu package): before 5.15.0.1016.19~20.04.1

linux-image-5.15.0-1016-gke (Ubuntu package): before 5.15.0-1016.19~20.04.1

CPE2.3

External links

https://ubuntu.com/security/notices/USN-5648-1

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

8) Resource management error

EUVDB-ID: #VU65844

Risk: Low

CVSSv4.0: 5.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/U:Clear]

CVE-ID: CVE-2022-33744

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows an attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper management of foreign mappings performed by rbtree when mapping pages of Arm guests. An unprivileged Arm guest can cause inconsistencies of the rbtree via PV devices, which can lead to denial of service of dom0 and cause crashes or the inability to perform further mappings of other guests' memory pages.

Mitigation

Update the affected package linux-gke-5.15 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-gke-5.15 (Ubuntu package): before 5.15.0.1016.19~20.04.1

linux-image-5.15.0-1016-gke (Ubuntu package): before 5.15.0-1016.19~20.04.1

CPE2.3

External links

https://ubuntu.com/security/notices/USN-5648-1

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.

9) Double Free

EUVDB-ID: #VU65297

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-2022-34494

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error within the rpmsg_virtio_add_ctrl_dev() function in drivers/rpmsg/virtio_rpmsg_bus.c in the Linux kernel remote processor messaging (rpmsg) framework. A local user can run a specially crafted program to trigger a double free error and perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux-gke-5.15 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-gke-5.15 (Ubuntu package): before 5.15.0.1016.19~20.04.1

linux-image-5.15.0-1016-gke (Ubuntu package): before 5.15.0-1016.19~20.04.1

CPE2.3

External links

https://ubuntu.com/security/notices/USN-5648-1

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.

10) Double Free

EUVDB-ID: #VU65643

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-2022-34495

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error within the rpmsg_probe() function in drivers/rpmsg/virtio_rpmsg_bus.c in Linux kernel. A local user can trigger a double free error in the virtio RPMSG bus driver and crash the system.

Mitigation

Update the affected package linux-gke-5.15 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-gke-5.15 (Ubuntu package): before 5.15.0.1016.19~20.04.1

linux-image-5.15.0-1016-gke (Ubuntu package): before 5.15.0-1016.19~20.04.1

CPE2.3

External links

https://ubuntu.com/security/notices/USN-5648-1

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.

11) Input validation error

EUVDB-ID: #VU66476

Risk: Medium

CVSSv4.0: 7.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2022-36946

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input within the nfqnl_mangle() function in net/netfilter/nfnetlink_queue.c in the Linux kernel when processing IPv6 packets. A remote attacker can send specially crafted packets to the system and perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux-gke-5.15 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-gke-5.15 (Ubuntu package): before 5.15.0.1016.19~20.04.1

linux-image-5.15.0-1016-gke (Ubuntu package): before 5.15.0-1016.19~20.04.1

CPE2.3

External links

https://ubuntu.com/security/notices/USN-5648-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

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.

Risk	Medium
Patch available	YES
Number of vulnerabilities	11
CVE-ID	CVE-2021-33655 CVE-2022-2318 CVE-2022-26365 CVE-2022-33740 CVE-2022-33741 CVE-2022-33742 CVE-2022-33743 CVE-2022-33744 CVE-2022-34494 CVE-2022-34495 CVE-2022-36946
CWE-ID	CWE-787 CWE-416 CWE-200 CWE-399 CWE-415 CWE-20
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #11 is available.
Vulnerable software	Ubuntu Operating systems & Components / Operating system linux-image-gke-5.15 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.15.0-1016-gke (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.