Ubuntu update for linux-oem-5.14

1) Memory leak

EUVDB-ID: #VU61392

Risk: High

CVSSv4.0: 6.6 [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:U/U:Amber]

CVE-ID: CVE-2022-0742

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

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak within igmp6_event_query() and igmp6_event_report() functions in Linux kernel when handling ICMPv6 packets. A remote attacker can flood the system with ICMPv6 messages of type 130 and 131 to cause out-of-memory condition and perform a denial of service (DoS) attack.

Mitigation

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

Vulnerable software versions

Ubuntu: 20.04

linux-image-5.14.0-1029-oem (Ubuntu package): before 5.14.0-1029.32

linux-image-oem-20.04 (Ubuntu package): before 5.14.0.1029.26

linux-image-oem-20.04d (Ubuntu package): before 5.14.0.1029.26

linux-image-oem-20.04b (Ubuntu package): before 5.14.0.1029.26

linux-image-oem-20.04c (Ubuntu package): before 5.14.0.1029.26

CPE2.3

• cpe:2.3:o:canonical:ubuntu:20.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:linux-image-5.14.0-1029-oem_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:linux-image-oem-20.04:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:linux-image-oem-20.04d_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:linux-image-oem-20.04b_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:linux-image-oem-20.04c_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-5346-1

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.