CVE-2016-2571

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 9.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-02-27 · updated 2026-06-17
Weakness: CWE-20

Description

http.cc in Squid 3.x before 3.5.15 and 4.x before 4.0.7 proceeds with the storage of certain data after a response-parsing failure, which allows remote HTTP servers to cause a denial of service (assertion failure and daemon exit) via a malformed response.

Affected products

Squid: 3.0, 3.0-rc4, 3.0.stable1, 3.0.stable2, 3.0.stable3, 3.0.stable4 (+130)

References

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html
http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html
http://rhn.redhat.com/errata/RHSA-2016-2600.html
http://www.debian.org/security/2016/dsa-3522
http://www.openwall.com/lists/oss-security/2016/02/26/2
http://www.securitytracker.com/id/1035101
http://www.squid-cache.org/Advisories/SQUID-2016_2.txt
http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-13990.patch
http://www.squid-cache.org/Versions/v4/changesets/squid-4-14548.patch
http://www.ubuntu.com/usn/USN-2921-1
https://security.gentoo.org/glsa/201607-01

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