PT-2011-4843 · Squid+3 · Squid+4

Jan Lieskovsky · Published 2011-11-17 · Updated 2016-11-28 · CVE-2011-4096

Positive Technologies (AI Summary)

CVSS v2.0

5.0

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Squid versions prior to 3.1.16

Description The issue is related to the idnsGrokReply function, which does not properly free memory. This allows remote attackers to cause a denial of service by sending a DNS reply containing a CNAME record that references another CNAME record with an empty A record.

Recommendations For versions prior to 3.1.16, update to version 3.1.16 or later to resolve the issue. As a temporary workaround, consider restricting access to the DNS service to minimize the risk of exploitation.

Fix

DoS

Weakness Enumeration

CWE-399

Related Identifiers

CESA-2011_1791

CVE-2011-4096

DSA-2381-1

RHSA-2011:1791

RHSA-2011_1791

SUSE-SU-2012_0129-1

SUSE-SU-2016:2089-1

Affected Products

Centos

Red Hat

Squid

Squid Cache

Suse

References · 74

• http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html · Vendor Advisory
• http://secunia.com/advisories/46609 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4096 · Security Note
• http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html · Vendor Advisory
• http://mandriva.com/security/advisories?name=MDVSA-2011:193 · Vendor Advisory
• http://redhat.com/support/errata/RHSA-2011-1791.html · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2016:2089-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2011-4096 · Security Note
• https://linux.oracle.com/errata/ELSA-2011-1791.html · Vendor Advisory
• http://lists.suse.com/mailman/listinfo/sle-security-updates · Note
• https://suse.com/security/cve/CVE-2016-4555 · Note
• http://openwall.com/lists/oss-security/2011/11/01/3 · Note
• https://suse.com/security/cve/CVE-2016-4051 · Note
• https://suse.com/security/cve/CVE-2016-4553 · Note
• http://squid-cache.org/Versions/v3/3.1/changesets/SQUID_3_1_16.html · Note