CVE-2011-4096
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…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 37.2%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 2.0
- 5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
- EPSS
- 37.19% probability · 98th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-399
- Affected
- squid-cache/squid
- Source
- secalert@redhat.com
References
- 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/46609Vendor Advisory
- 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
- 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/46609Vendor Advisory
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.