Ubuntu update for linux-oem-6.1



| Updated: 2023-06-26
Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2023-2612
CVE-2023-32233
CWE-ID CWE-362
CWE-416
Exploitation vector Local
Public exploit Public exploit code for vulnerability #2 is available.
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

linux-image-oem-22.04c (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-6.1.0-1013-oem (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Race condition

EUVDB-ID: #VU76655

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-2023-2612

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) attack.

The vulnerability exists due to a race condition within the shiftfs filesystem when handling inode locking in some
situations. A local user can exploit the race and cause a denial of service (kernel deadlock).

Mitigation

Update the affected package linux-oem-6.1 to the latest version.

Vulnerable software versions

Ubuntu: 22.04

linux-image-oem-22.04c (Ubuntu package): before 6.1.0.1013.13

linux-image-6.1.0-1013-oem (Ubuntu package): before 6.1.0-1013.13

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6122-1


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: #VU75807

Risk: Low

CVSSv4.0: 7.1 [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:P/U:Clear]

CVE-ID: CVE-2023-32233

CWE-ID: CWE-416 - Use After Free

Exploit availability: Yes

Description

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

The vulnerability exists due to a use-after-free error in Netfilter nf_tables when processing batch requests. A local user can trigger a use-after-free error and execute arbitrary code with root privileges.

Mitigation

Update the affected package linux-oem-6.1 to the latest version.

Vulnerable software versions

Ubuntu: 22.04

linux-image-oem-22.04c (Ubuntu package): before 6.1.0.1013.13

linux-image-6.1.0-1013-oem (Ubuntu package): before 6.1.0-1013.13

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6122-1


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. However, proof of concept for this vulnerability is available.



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