REDHAT-BUG-2260051
First published: Wed Jan 24 2024(Updated: )
Squid is a caching proxy for the Web. Due to an expired pointer reference bug, Squid prior to version 6.6 is vulnerable to a Denial of Service attack against Cache Manager error responses. This problem allows a trusted client to perform Denial of Service when generating error pages for Client Manager reports. Squid older than 5.0.5 have not been tested and should be assumed to be vulnerable. All Squid-5.x up to and including 5.9 are vulnerable. All Squid-6.x up to and including 6.5 are vulnerable. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. As a workaround, prevent access to Cache Manager using Squid's main access control: `http_access deny manager`. <a href="http://www.squid-cache.org/Versions/v5/SQUID-2023_11.patch">http://www.squid-cache.org/Versions/v5/SQUID-2023_11.patch</a> <a href="http://www.squid-cache.org/Versions/v6/SQUID-2023_11.patch">http://www.squid-cache.org/Versions/v6/SQUID-2023_11.patch</a> <a href="https://github.com/squid-cache/squid/commit/290ae202883ac28a48867079c2fb34c40efd382b">https://github.com/squid-cache/squid/commit/290ae202883ac28a48867079c2fb34c40efd382b</a> <a href="https://github.com/squid-cache/squid/commit/e8118a7381213f5cfcdeb4cec1d2d854bfd261c8">https://github.com/squid-cache/squid/commit/e8118a7381213f5cfcdeb4cec1d2d854bfd261c8</a> <a href="https://github.com/squid-cache/squid/security/advisories/GHSA-j49p-553x-48rx">https://github.com/squid-cache/squid/security/advisories/GHSA-j49p-553x-48rx</a> <a href="https://megamansec.github.io/Squid-Security-Audit/stream-assert.html">https://megamansec.github.io/Squid-Security-Audit/stream-assert.html</a>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Squid Web Proxy Cache | <=6.5<=5.9>5.0.5 |
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Reference Links
- http://www.squid-cache.org/Versions/v5/SQUID-2023_11.patch
- http://www.squid-cache.org/Versions/v6/SQUID-2023_11.patch
- https://github.com/squid-cache/squid/commit/290ae202883ac28a48867079c2fb34c40efd382b
- https://github.com/squid-cache/squid/commit/e8118a7381213f5cfcdeb4cec1d2d854bfd261c8
- https://github.com/squid-cache/squid/security/advisories/GHSA-j49p-553x-48rx
- https://megamansec.github.io/Squid-Security-Audit/stream-assert.html
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2260053
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2260054
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2260052
- https://access.redhat.com/errata/RHSA-2024:4861
- https://access.redhat.com/errata/RHSA-2024:9644
- https://bugzilla.redhat.com/show_bug.cgi?id=2260051
Frequently Asked Questions
What is the severity of REDHAT-BUG-2260051?
REDHAT-BUG-2260051 is classified as a Denial of Service vulnerability affecting Squid prior to version 6.6.
How do I fix REDHAT-BUG-2260051?
To fix REDHAT-BUG-2260051, upgrade Squid to version 6.6 or later.
Which versions of Squid are affected by REDHAT-BUG-2260051?
REDHAT-BUG-2260051 affects Squid versions up to and including 6.5 and versions starting from 5.0.5 up to 5.9.
What type of attack does REDHAT-BUG-2260051 facilitate?
REDHAT-BUG-2260051 facilitates a Denial of Service attack against Cache Manager error responses in Squid.
Who can exploit REDHAT-BUG-2260051?
A trusted client can exploit REDHAT-BUG-2260051 to generate Denial of Service by triggering error pages.
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- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2024-23638
- agent/references
- agent/last-modified-date
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- agent/guess-ai
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- agent/software-canonical-lookup-request
- vendor/squid
- canonical/squid web proxy cache