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
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
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

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Severity score breakdown

CVSS version: CVSS v3.0

Base score 10.0 · Critical

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

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