Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects. An input validation flaw was found in the way Squid calculated the total number of resource records in the answer section of multiple name server responses. An attacker could use this flaw to cause Squid to crash. Updated packages are available from ftp.redhat.com.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: squid security update Advisory ID: RHSA-2011:1791-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-1791.html Issue date: 2011-12-06 CVE Names: CVE-2011-4096 ===================================================================== 1. Summary: An updated squid package that fixes one security issue is now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64 3. Description: Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects. An input validation flaw was found in the way Squid calculated the total number of resource records in the answer section of multiple name server responses. An attacker could use this flaw to cause Squid to crash. (CVE-2011-4096) Users of squid should upgrade to this updated package, which contains a backported patch to correct this issue. After installing this update, the squid service will be restarted automatically. 4. Solution: Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259 5. Bugs fixed (http://bugzilla.redhat.com/): 750316 - CVE-2011-4096 squid: Invalid free by processing CNAME DNS record pointing to another CNAME record pointing to an empty A-record 6. Package List: Red Hat Enterprise Linux Server (v. 6): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/squid-3.1.10-1.el6_2.1.src.rpm i386: squid-3.1.10-1.el6_2.1.i686.rpm squid-debuginfo-3.1.10-1.el6_2.1.i686.rpm ppc64: squid-3.1.10-1.el6_2.1.ppc64.rpm squid-debuginfo-3.1.10-1.el6_2.1.ppc64.rpm s390x: squid-3.1.10-1.el6_2.1.s390x.rpm squid-debuginfo-3.1.10-1.el6_2.1.s390x.rpm x86_64: squid-3.1.10-1.el6_2.1.x86_64.rpm squid-debuginfo-3.1.10-1.el6_2.1.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 6): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/squid-3.1.10-1.el6_2.1.src.rpm i386: squid-3.1.10-1.el6_2.1.i686.rpm squid-debuginfo-3.1.10-1.el6_2.1.i686.rpm x86_64: squid-3.1.10-1.el6_2.1.x86_64.rpm squid-debuginfo-3.1.10-1.el6_2.1.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/#package 7. References: https://www.redhat.com/security/data/cve/CVE-2011-4096.html https://access.redhat.com/security/updates/classification/#moderate 8. Contact: The Red Hat security contact is <firstname.lastname@example.org>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2011 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFO3okaXlSAg2UNWIIRAugUAJ48SoKaJnBIdV3VuU2LnoNJduKCPQCgl16T 0qMU+uAlo+8SMzhx+aS6EuE= =tyE7 -----END PGP SIGNATURE-----