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Vulnerability record · CVE-2010-2951 · published 12 October 2010

CVE-2010-2951: Squid-cache squid vulnerability

Squid Cache · Squid

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.

5.0 CVSS 2.0 Medium EPSS 31% · top 1.8%
5.0CVSS 2.0 base score
31%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
22References
16 Jun 2026Last modified by NVD

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.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://bazaar.launchpad.net/~squid/squid/3.1/revision/10072 Patch
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 PatchVendor Advisory
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 Patch
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 Patch
https://bugzilla.redhat.com/show_bug.cgi?id=626927
http://bazaar.launchpad.net/~squid/squid/3.1/revision/10072 Patch
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 PatchVendor Advisory
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 Patch
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 Patch
https://bugzilla.redhat.com/show_bug.cgi?id=626927

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2010-2951), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.