CVE-2011-4096
The MITRE CVE dictionary describes this issue as:
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.
Find out more about CVE-2011-4096 from the MITRE CVE dictionary dictionary and NIST NVD.
Statement
This issue did not affect the versions of squid as shipped with Red Hat Enterprise Linux 4 and 5 as they did not include IPv6 support. This issue was introduced with the addition of IPv6 support in Squid 3.1 (in the changes made to the idnsGrokReply function).
CVSS v2 metrics
| Base Score | 3.3 |
|---|---|
| Base Metrics | AV:A/AC:L/Au:N/C:N/I:N/A:P |
| Access Vector | Adjacent Network |
| Access Complexity | Low |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Partial |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
Red Hat Security Errata
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux 6 (squid) | RHSA-2011:1791 | 2011-12-06 |
Affected Packages State
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 5 | squid | Not affected |
| Red Hat Enterprise Linux 4 | squid | Not affected |
CVE description copyright © 2017, The MITRE Corporation