CVE-2016-2390

Severity: medium (CVSS 5.9 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 25.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-04-19 · updated 2026-06-17
Weakness: CWE-20

Description

The FwdState::connectedToPeer method in FwdState.cc in Squid before 3.5.14 and 4.0.x before 4.0.6 does not properly handle SSL handshake errors when built with the --with-openssl option, which allows remote attackers to cause a denial of service (application crash) via a plaintext HTTP message.

Affected products

Squid: through 3.5.13; 4.0.4, 4.0.5

References

http://bugs.squid-cache.org/show_bug.cgi?id=4437
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html
http://lists.squid-cache.org/pipermail/squid-announce/2016-February/000037.html
http://lists.squid-cache.org/pipermail/squid-announce/2016-February/000038.html
http://www.securitytracker.com/id/1035045
http://www.squid-cache.org/Advisories/SQUID-2016_1.txt
http://bugs.squid-cache.org/show_bug.cgi?id=4437
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html
http://lists.squid-cache.org/pipermail/squid-announce/2016-February/000037.html
http://lists.squid-cache.org/pipermail/squid-announce/2016-February/000038.html

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