Ubuntu update for haproxy

1) Heap-based buffer overflow

EUVDB-ID: #VU107589

Risk: Low

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-32464

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 within the regsub() function in src/sample.c. A remote attacker can pass specially crafted data to the application, trigger a heap-based buffer overflow and perform a denial of service (DoS) attack.

Successful exploitation of this vulnerability requires a very specific configuration of the proxy server.

Mitigation

Update the affected package haproxy to the latest version.

Vulnerable software versions

Ubuntu: 25.04

haproxy (Ubuntu package): before 3.0.8-1ubuntu1.1

CPE2.3

• cpe:2.3:o:canonical:ubuntu:25.04:*:*:*:*:*:*:*
• cpe:2.3:a:canonical:haproxy_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-7431-2

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.