Resource management error in Squid - CVE-2011-4096
Published: November 17, 2011 / Updated: August 11, 2020
Vulnerability identifier: #VU44514
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2011-4096
CWE-ID: CWE-399
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Squid-cache.org
Affected software:
Squid
Squid
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
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.
How to mitigate CVE-2011-4096
Install update from vendor's website.
Sources
- http://bugs.squid-cache.org/show_bug.cgi?id=3237#c12
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html
- http://secunia.com/advisories/46609
- http://secunia.com/advisories/47459
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:193
- http://www.openwall.com/lists/oss-security/2011/10/31/5
- http://www.openwall.com/lists/oss-security/2011/11/01/3
- http://www.redhat.com/support/errata/RHSA-2011-1791.html
- http://www.securitytracker.com/id?1026265
- http://www.squid-cache.org/Versions/v3/3.1/changesets/SQUID_3_1_16.html