CVE-2025-54574

Publication date 1 August 2025

Last updated 4 August 2025


Ubuntu priority

Cvss 3 Severity Score

9.3 · Critical

Score breakdown

Squid is a caching proxy for the Web. In versions 6.3 and below, Squid is vulnerable to a heap buffer overflow and possible remote code execution attack when processing URN due to incorrect buffer management. This has been fixed in version 6.4. To work around this issue, disable URN access permissions.

Read the notes from the security team

Status

Package Ubuntu Release Status
squid3 25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation
squid 25.04 plucky
Not affected
24.04 LTS noble
Not affected
22.04 LTS jammy
Fixed 5.7-0ubuntu0.22.04.4
20.04 LTS focal
Fixed 4.10-1ubuntu1.12

Notes


mdeslaur

Ths commit to fix this issue is the same commit that fixed CVE-2023-5824 in USN-6728-1, USN-6728-2, and USN-6728-3. See CVE-2023-5824 for additional commits.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
squid

Severity score breakdown

Parameter Value
Base score 9.3 · Critical
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Changed
Confidentiality None
Integrity impact Low
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H