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Squid Proxy Cache Security Update Advisory SQUID-2024:1
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Advisory ID: | SQUID-2024:1
Date: | Mar 4, 2024
Summary: | Denial of Service in HTTP Chunked Decoding
Affected versions: | Squid 3.5.27 -> 3.5.28
| Squid 4.x -> 4.17
| Squid 5.x -> 5.9
| Squid 6.x -> 6.7
Fixed in version: | Squid 6.8
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Problem Description:
Due to an Uncontrolled Recursion bug, Squid may be vulnerable to
a Denial of Service attack against HTTP Chunked decoder.
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Severity:
This problem allows a remote attacker to perform Denial of
Service when sending a crafted chunked encoded HTTP Message.
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Updated Packages:
This bug is fixed by Squid version 6.8.
In addition, patches addressing this problem for the stable
releases can be found in our patch archives:
Squid 6:
<http://www.squid-cache.org/Versions/v6/SQUID-2024_1.patch>
If you are using a prepackaged version of Squid then please refer
to the package vendor for availability information on updated
packages.
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Determining if your version is vulnerable:
Squid older than 3.5.27 are not vulnerable.
All Squid 3.5.27 to 4.17 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 6.7 are vulnerable.
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Workaround:
**There is no workaround for this issue**
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Contact details for the Squid project:
For installation / upgrade support on binary packaged versions
of Squid: your first point of contact should be your binary
package vendor.
If you install and build Squid from the original Squid sources
then the <squid-users@xxxxxxxxxxxxxxxxxxxxx> mailing list is your
primary support point. For subscription details see
<http://www.squid-cache.org/Support/mailing-lists.html>.
For reporting of non-security bugs in the latest STABLE release
the squid bugzilla database should be used
<https://bugs.squid-cache.org/>.
For reporting of security sensitive bugs send an email to the
<squid-bugs@xxxxxxxxxxxxxxxxxxxxx> mailing list. It's a closed
list (though anyone can post) and security related bug reports
are treated in confidence until the impact has been established.
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Credits:
This vulnerability was discovered by Joshua Rogers of Opera
Software.
Fixed by The Measurement Factory.
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Revision history:
2023-10-12 11:53:02 UTC Initial Report
2023-10-31 11:35:02 UTC Patches Released
2024-03-04 06:27:00 UTC Fixed Version Released
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END
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