National Cyber Awareness System

Vulnerability Summary for CVE-2011-4096

Overview

The idnsGrokReply function in Squid before 3.1.16 does not properly free memory, which allows remote attackers to cause a denial of service (daemon abort) via a DNS reply containing a CNAME record that references another CNAME record that contains an empty A record.

Impact

CVSS Severity (version 2.0):

CVSS Version 2 Metrics:

References to Advisories, Solutions, and Tools

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External Source: CONFIRM

Name: http://www.squid-cache.org/Versions/v3/3.1/changesets/SQUID_3_1_16.html

Hyperlink:http://www.squid-cache.org/Versions/v3/3.1/changesets/SQUID_3_1_16.html

External Source: SECTRACK

Name: 1026265

Hyperlink:http://www.securitytracker.com/id?1026265

External Source: REDHAT

Name: RHSA-2011:1791

Hyperlink:http://www.redhat.com/support/errata/RHSA-2011-1791.html

External Source: MLIST

Name: [oss-security] 20111031 Re: CVE Request -- Squid v3.1.16 -- Invalid free by processing CNAME DNS record pointing to another CNAME record pointing to an empty A-record

Hyperlink:http://www.openwall.com/lists/oss-security/2011/11/01/3

External Source: MLIST

Name: [oss-security] 20111031 CVE Request -- Squid v3.1.16 -- Invalid free by processing CNAME DNS record pointing to another CNAME record pointing to an empty A-record

Hyperlink:http://www.openwall.com/lists/oss-security/2011/10/31/5

External Source: MANDRIVA

Name: MDVSA-2011:193

Hyperlink:http://www.mandriva.com/security/advisories?name=MDVSA-2011:193

External Source: SECUNIA

Name: 47459

Hyperlink:http://secunia.com/advisories/47459

External Source: SECUNIA

Name: 46609

Type: Advisory

Hyperlink:http://secunia.com/advisories/46609

External Source: MISC

Name: http://bugs.squid-cache.org/show_bug.cgi?id=3237#c12

Hyperlink:http://bugs.squid-cache.org/show_bug.cgi?id=3237#c12