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    CVE-2010-2951

    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.

    Published:Aug 18, 2010
    Last Modified:Apr 11, 2025
    EPS:Oct 12, 2010
    EPSS Score:0.51588
    CVSS Score:5

    Affected Products

    Vendor
    Squid-cache
    Product
    Squid

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-50012 (CVSS 5.5) — Squid is a caching proxy for the Web. Prior to 7.6, due to an improper input validation bug in cache digest re…
    CVE-2026-47729 (CVSS 6.5) — Squid is a caching proxy for the Web. Prior to 7.6, due to an improper validation of syntactic correctness of …
    CVE-2026-33526 (CVSS 9.2) — Squid is a caching proxy for the Web. Prior to version 7.5, due to heap Use-After-Free, Squid is vulnerable to…
    CVE-2026-33515 (CVSS 6.9) — Squid is a caching proxy for the Web. Prior to version 7.5, due to improper input validation, Squid is vulnera…
    CVE-2026-32748 (CVSS 8.7) — Squid is a caching proxy for the Web. Prior to version 7.5, due to premature release of resource during expect…
    CVE-2025-62168 (CVSS 10) — Squid is a caching proxy for the Web. In Squid versions prior to 7.2, a failure to redact HTTP authentication …
    CVE-2025-59362 (CVSS 4) — Squid through 7.1 mishandles ASN.1 encoding of long SNMP OIDs. This occurs in asn_build_objid in lib/snmplib/a…
    CVE-2025-54574 (CVSS 9.3) — Squid is a caching proxy for the Web. In versions 6.3 and below, Squid is vulnerable to a heap buffer overflow…
    CVE-2024-45802 (CVSS 7.5) — Squid is an open source caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to Input Validati…
    CVE-2024-37894 (CVSS 6.3) — Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to an Out-of-bounds Write erro…

    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
    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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High