Headline
CVE-2023-49286: SQUID-2023:8 Denial of Service in Helper Process management
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to an Incorrect Check of Function Return Value bug Squid is vulnerable to a Denial of Service attack against its Helper process management. This bug is fixed by Squid version 6.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Due to an Incorrect Check of Function Return Value
bug Squid is vulnerable to a Denial of Service
attack against its Helper process management.
Severity:
This problem allows a trusted client or remote server to perform
a Denial of Service attack when the Squid proxy is under load.
CVSS Score of 8.6
https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H&version=3.1
Updated Packages:****This bug is fixed by Squid version 6.5.
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-2023_8.patch
If you are using a prepackaged version of Squid then please refer
to the package vendor for availability information on updated
packages.
Determining if your version is vulnerable:
Squid older than 5.0 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 6.4 are vulnerable.
Workaround:
There is no known workaround for this issue.
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 [email protected] 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
[email protected] 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.
Credits:
This vulnerability was discovered by Joshua Rogers of Opera
Software.
Fixed by The Measurement Factory.
Revision history:
2023-10-12 11:53:02 UTC Initial Report
2023-10-27 21:27:20 UTC Patch Released
END
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