Ubuntu update for linux-oem-5.14

1) Type Confusion

EUVDB-ID: #VU65360

Risk: Low

CVSSv4.0: 8.5 [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:A/U:Clear]

CVE-ID: CVE-2022-34918

CWE-ID: CWE-843 - Type confusion

Exploit availability: Yes

Description

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

The vulnerability exists in the Linux kernel’s Netfilter subsystem in the way a user provides incorrect input of the NFT_DATA_VERDICT type. A local user can pass specially crafted data to the application, trigger a type confusion error and escalate privileges on the system.

Mitigation

Update the affected package linux-oem-5.14 to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 22.04

linux-image-oem-20.04c (Ubuntu package): before 5.14.0.1046.42

linux-image-oem-20.04b (Ubuntu package): before 5.14.0.1046.42

linux-image-oem-20.04d (Ubuntu package): before 5.14.0.1046.42

linux-image-5.14.0-1046-oem (Ubuntu package): before 5.14.0-1046.53

linux-image-oem-20.04 (Ubuntu package): before 5.14.0.1046.42

linux-image-oem-22.04a (Ubuntu package): before 5.17.0.1014.13

linux-image-5.17.0-1014-oem (Ubuntu package): before 5.17.0-1014.15

linux-image-oem-22.04 (Ubuntu package): before 5.17.0.1014.13

CPE2.3

• cpe:2.3:o:canonical:ubuntu:20.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:22.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:linux-image-oem-20.04c_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:linux-image-oem-20.04b_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:linux-image-oem-20.04d_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:linux-image-5.14.0-1046-oem_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:linux-image-oem-20.04:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:linux-image-oem-22.04a_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:linux-image-5.17.0-1014-oem_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:linux-image-oem-22.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-5545-1

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?

Yes. This vulnerability is being exploited in the wild.