Red Hat Security Advisory: libproxy security update Security Advisory secalert@redhat.com Red Hat Security Response Team RHSA-2012:1461 Final 1 1 2012-11-14T20:26:00Z Current version 2012-11-14T20:26:00Z 2012-11-14T20:26:00Z Red Hat rhsa-to-cvrf 1.0.1484 2012-11-14T20:33:02Z Updated libproxy packages that fix one security issue are 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. libproxy is a library that handles all the details of proxy configuration. A buffer overflow flaw was found in the way libproxy handled the downloading of proxy auto-configuration (PAC) files. A malicious server hosting a PAC file or a man-in-the-middle attacker could use this flaw to cause an application using libproxy to crash or, possibly, execute arbitrary code, if the proxy settings obtained by libproxy (from the environment or the desktop environment settings) instructed the use of a PAC proxy configuration. (CVE-2012-4505) This issue was discovered by the Red Hat Security Response Team. Users of libproxy should upgrade to these updated packages, which contain a backported patch to correct this issue. All applications using libproxy must be restarted for this update to take effect. Please see https://www.redhat.com/footer/terms-of-use.html Copyright © 2012 Red Hat, Inc. All rights reserved. Moderate https://rhn.redhat.com/errata/RHSA-2012-1461.html https://rhn.redhat.com/errata/RHSA-2012-1461.html https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/security/updates/classification/#moderate Red Hat Enterprise Linux HPC Node Optional (v. 6) Red Hat Enterprise Linux Server (v. 6) Red Hat Enterprise Linux Workstation (v. 6) Red Hat Enterprise Linux Desktop Optional (v. 6) Red Hat Enterprise Linux Workstation Optional (v. 6) Red Hat Enterprise Linux Desktop (v. 6) Red Hat Enterprise Linux Server Optional (v. 6) libproxy-0.3.0-3.el6_3.src.rpm libproxy-0.3.0-3.el6_3 as a component of Red Hat Enterprise Linux HPC Node Optional (v. 6) libproxy-0.3.0-3.el6_3 as a component of Red Hat Enterprise Linux Server (v. 6) libproxy-0.3.0-3.el6_3 as a component of Red Hat Enterprise Linux Workstation (v. 6) libproxy-0.3.0-3.el6_3 as a component of Red Hat Enterprise Linux Desktop Optional (v. 6) libproxy-0.3.0-3.el6_3 as a component of Red Hat Enterprise Linux Workstation Optional (v. 6) libproxy-0.3.0-3.el6_3 as a component of Red Hat Enterprise Linux Desktop (v. 6) libproxy-0.3.0-3.el6_3 as a component of Red Hat Enterprise Linux Server Optional (v. 6) A buffer overflow flaw was found in the way libproxy handled the downloading of proxy auto-configuration (PAC) files. A malicious server hosting a PAC file or a man-in-the-middle attacker could use this flaw to cause an application using libproxy to crash or, possibly, execute arbitrary code, if the proxy settings obtained by libproxy (from the environment or the desktop environment settings) instructed the use of a PAC proxy configuration. 2012-10-09T00:00:00Z 2012-10-12T00:00:00Z CVE-2012-4505 6Client-6.3.z:libproxy-0.3.0-3.el6_3 6Client-optional-6.3.z:libproxy-0.3.0-3.el6_3 6ComputeNode-optional-6.3.z:libproxy-0.3.0-3.el6_3 6Server-6.3.z:libproxy-0.3.0-3.el6_3 6Server-optional-6.3.z:libproxy-0.3.0-3.el6_3 6Workstation-6.3.z:libproxy-0.3.0-3.el6_3 6Workstation-optional-6.3.z:libproxy-0.3.0-3.el6_3 Moderate 5.1 AV:N/AC:H/Au:N/C:P/I:P/A:P 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/knowledge/articles/11258 https://rhn.redhat.com/errata/RHSA-2012-1461.html https://www.redhat.com/security/data/cve/CVE-2012-4505.html CVE-2012-4505 https://bugzilla.redhat.com/show_bug.cgi?id=864612 bz#864612: CVE-2012-4505 libproxy: PAC handling insufficient content length check leading to buffer overflow This issue was discovered by the Red Hat Security Response Team.