CVE-2010-2951

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 31.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2010-10-12 · updated 2026-06-16

Description

dns_internal.cc in Squid 3.1.6, when IPv6 DNS resolution is not enabled, accesses an invalid socket during an IPv4 TCP DNS query, which allows remote attackers to cause a denial of service (assertion failure and daemon exit) via vectors that trigger an IPv4 DNS response with the TC bit set.

Affected products

Squid: 3.1.6

References

http://bazaar.launchpad.net/~squid/squid/3.1/revision/10072
http://bugs.gentoo.org/show_bug.cgi?id=334263
http://bugs.squid-cache.org/show_bug.cgi?id=3009
http://bugs.squid-cache.org/show_bug.cgi?id=3021
http://marc.info/?l=squid-users&m=128263555724981&w=2
http://www.openwall.com/lists/oss-security/2010/08/24/6
http://www.openwall.com/lists/oss-security/2010/08/24/7
http://www.openwall.com/lists/oss-security/2010/08/25/2
http://www.openwall.com/lists/oss-security/2010/08/25/6
http://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10072.patch
https://bugzilla.redhat.com/show_bug.cgi?id=626927
http://bazaar.launchpad.net/~squid/squid/3.1/revision/10072

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