Ubuntu update for expat

1) Use-after-free

EUVDB-ID: #VU67532

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2022-40674

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in the doContent() function in xmlparse.c. A remote attacker can pass specially crafted input to the application that is using the affected library, trigger a use-after-free error and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Update the affected package expat to the latest version.

Vulnerable software versions

Ubuntu: 16.04

lib64expat1 (Ubuntu package): before 2.1.07ubuntu0.16.04.5+esm6

libexpat1 (Ubuntu package): before 2.1.07ubuntu0.16.04.5+esm6

expat (Ubuntu package): before 2.1.07ubuntu0.16.04.5+esm6

CPE2.3

• cpe:2.3:o:canonical:ubuntu:16.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:lib64expat1_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:libexpat1_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:expat_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-5638-1

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.