Ubuntu update for zlib

1) Heap-based buffer overflow

EUVDB-ID: #VU66153

Risk: High

CVSSv4.0: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2022-37434

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: Yes

Description

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

The vulnerability exists due to a boundary error when processing a large gzip header within inflateGetHeader in inflate.c. A remote attacker can pass a specially crafted file to the affected application, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Mitigation

Update the affected package zlib to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 22.04

zlib1g (Ubuntu package): before 1:1.2.11.dfsg-2ubuntu1.5

lib32z1 (Ubuntu package): before 1:1.2.11.dfsg-2ubuntu1.5

libx32z1 (Ubuntu package): before 1:1.2.11.dfsg-2ubuntu1.5

lib64z1 (Ubuntu package): before 1:1.2.11.dfsg-2ubuntu1.5

CPE2.3

• cpe:2.3:o:canonical:ubuntu:20.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:22.04:*:*:*:*:*:*:*
• cpe:2.3:a:canonical:zlib1g_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:lib32z1_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:libx32z1_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:lib64z1_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-5570-2

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.