CVE-2011-4096

Description

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.

Category

5.0
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 60.16% Top 5%
Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory mandriva.com Vendor Advisory opensuse.org Vendor Advisory secunia.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://bugs.squid-cache.org/show_bug.cgi?id=3237#c12
http://www.redhat.com/support/errata/RHSA-2011-1791.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html vendor advisory
http://www.openwall.com/lists/oss-security/2011/10/31/5 mailing list
http://www.securitytracker.com/id?1026265 vdb entry
http://www.openwall.com/lists/oss-security/2011/11/01/3 mailing list
http://www.mandriva.com/security/advisories?name=MDVSA-2011:193 vendor advisory
http://secunia.com/advisories/46609 third party advisory vendor advisory
http://www.squid-cache.org/Versions/v3/3.1/changesets/SQUID_3_1_16.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html vendor advisory
http://secunia.com/advisories/47459 third party advisory

Frequently Asked Questions

What is the severity of CVE-2011-4096?
CVE-2011-4096 has been scored as a medium severity vulnerability.
How to fix CVE-2011-4096?
To fix CVE-2011-4096, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2011-4096 being actively exploited in the wild?
It is possible that CVE-2011-4096 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~60% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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