FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

squid -- Vulnerable to Denial of Service attack

Affected packages
squid < 3.5.27_3
squid-devel < 4.0.23

Details

VuXML ID d5b6d151-1887-11e8-94f7-9c5c8e75236a
Discovery 2017-12-13
Entry 2018-02-23

Louis Dion-Marcil reports:

Due to incorrect pointer handling Squid is vulnerable to denial of service attack when processing ESI responses.

This problem allows a remote server delivering certain ESI response syntax to trigger a denial of service for all clients accessing the Squid service.

Due to unrelated changes Squid-3.5 has become vulnerable to some regular ESI server responses also triggering this issue.

This problem is limited to the Squid custom ESI parser. Squid built to use libxml2 or libexpat XML parsers do not have this problem.

Due to incorrect pointer handling Squid is vulnerable to denial of service attack when processing ESI responses or downloading intermediate CA certificates.

This problem allows a remote client delivering certain HTTP requests in conjunction with certain trusted server responses to trigger a denial of service for all clients accessing the Squid service.

References

CVE Name CVE-2018-1000024
CVE Name CVE-2018-1000027
FreeBSD PR ports/226138
URL http://www.squid-cache.org/Advisories/SQUID-2018_1.txt
URL http://www.squid-cache.org/Advisories/SQUID-2018_2.txt
URL https://www.debian.org/security/2018/dsa-4122