CVE-2016-2569

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 31.2% 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

Squid 3.x before 3.5.15 and 4.x before 4.0.7 does not properly append data to String objects, which allows remote servers to cause a denial of service (assertion failure and daemon exit) via a long string, as demonstrated by a crafted HTTP Vary header.

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.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-3.5-13991.patch
http://www.squid-cache.org/Versions/v4/changesets/squid-4-14552.patch
https://security.gentoo.org/glsa/201607-01
https://usn.ubuntu.com/3557-1/
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html

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