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Fencer Intel
medium 5.0

CVE-2010-2951 json

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 all…

published 16y ago modified 4mo ago also EUVD-2010-2955

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
31.5%
EPSS 31.5% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

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.

Patch / fix

Is CVE-2010-2951 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2010-2951 updated cvss 5.0

squid: child assertion failure when processing large DNS replies with no IPv6 resolver present

  • Red Hat Enterprise Linux 6 squid
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 4 squid Red Hat Enterprise Linux 5 squid
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

31.47% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.