CVE-2025-62168

Publication date 21 October 2025

Last updated 28 October 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

10.0 · Critical

Score breakdown

Description

Squid is a caching proxy for the Web. In Squid versions prior to 7.2, a failure to redact HTTP authentication credentials in error handling allows information disclosure. The vulnerability allows a script to bypass browser security protections and learn the credentials a trusted client uses to authenticate. This potentially allows a remote client to identify security tokens or credentials used internally by a web application using Squid for backend load balancing. These attacks do not require Squid to be configured with HTTP authentication. The vulnerability is fixed in version 7.2. As a workaround, disable debug information in administrator mailto links generated by Squid by configuring squid.conf with email_err_data off.

Status

Package Ubuntu Release Status
squid3 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
18.04 LTS bionic
Fixed 3.5.27-1ubuntu1.14+esm4
16.04 LTS xenial
Fixed 3.5.12-1ubuntu7.16+esm5
squid 25.10 questing
Fixed 6.13-1ubuntu4.1
25.04 plucky
Fixed 6.13-1ubuntu1.2
24.04 LTS noble
Fixed 6.13-0ubuntu0.24.04.3
22.04 LTS jammy
Fixed 5.9-0ubuntu0.22.04.4
20.04 LTS focal
Fixed 4.10-1ubuntu1.13+esm1

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Severity score breakdown

Parameter Value
Base score 10.0 · Critical
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Changed
Confidentiality High
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

References

Related Ubuntu Security Notices (USN)

Other references