CVE-2016-3947

Severity: high (CVSS 8.2 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 14.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-04-07 · updated 2026-06-17
Weakness: CWE-119

Description

Heap-based buffer overflow in the Icmp6::Recv function in icmp/Icmp6.cc in the pinger utility in Squid before 3.5.16 and 4.x before 4.0.8 allows remote servers to cause a denial of service (performance degradation or transition failures) or write sensitive information to log files via an ICMPv6 packet.

Affected products

Canonical Ubuntu Linux: 12.04, 14.04, 15.10, 16.04
Squid: through 3.5.15; 4.0.1, 4.0.2, 4.0.3, 4.0.4, 4.0.5, 4.0.6 (+1)

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://www.securitytracker.com/id/1035457
http://www.squid-cache.org/Advisories/SQUID-2016_3.txt
http://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10495.patch
http://www.squid-cache.org/Versions/v3/3.2/changesets/squid-3.2-11839.patch
http://www.squid-cache.org/Versions/v3/3.3/changesets/squid-3.3-12694.patch
http://www.squid-cache.org/Versions/v3/3.4/changesets/squid-3.4-13232.patch
http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-14015.patch
http://www.ubuntu.com/usn/USN-2995-1
https://security.gentoo.org/glsa/201607-01

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