Ubuntu update for clamav

1) Heap-based buffer overflow

EUVDB-ID: #VU103240

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-20128

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

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error when decrypting OLE2 file format. A remote attacker can pass a specially crafted file to the application, trigger a heap-based buffer overflow and perform a denial of service (DoS) attack.

Mitigation

Update the affected package clamav to the latest version.

Vulnerable software versions

Ubuntu: 24.04 - 24.10

clamav (Ubuntu package): before 1.0.8+dfsg-0ubuntu0.24.04.1

CPE2.3

• cpe:2.3:o:canonical:ubuntu:24.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:24.10:*:*:*:*:*:*:*
• cpe:2.3:a:canonical:clamav_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-7229-1

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.