Red Hat Security Advisory: expat security update Security Advisory secalert@redhat.com Red Hat Security Response Team RHSA-2012:0731 Final 1 1 2012-06-13T13:53:00Z Current version 2012-06-13T13:53:00Z 2012-06-13T13:53:00Z Red Hat rhsa-to-cvrf 1.0.1484 2012-06-13T14:01:02Z Updated expat packages that fix two security issues are now available for Red Hat Enterprise Linux 5 and 6. The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. Expat is a C library written by James Clark for parsing XML documents. A denial of service flaw was found in the implementation of hash arrays in Expat. An attacker could use this flaw to make an application using Expat consume an excessive amount of CPU time by providing a specially-crafted XML file that triggers multiple hash function collisions. To mitigate this issue, randomization has been added to the hash function to reduce the chance of an attacker successfully causing intentional collisions. (CVE-2012-0876) A memory leak flaw was found in Expat. If an XML file processed by an application linked against Expat triggered a memory re-allocation failure, Expat failed to free the previously allocated memory. This could cause the application to exit unexpectedly or crash when all available memory is exhausted. (CVE-2012-1148) All Expat users should upgrade to these updated packages, which contain backported patches to correct these issues. After installing the updated packages, applications using the Expat library must be restarted for the 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-2012-0731.html https://rhn.redhat.com/errata/RHSA-2012-0731.html https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/security/updates/classification/#moderate Red Hat Enterprise Linux Desktop (v. 5 client) Red Hat Enterprise Linux HPC Node (v. 6) Red Hat Enterprise Linux Desktop (v. 6) 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 (v. 5 server) RHEL Desktop Workstation (v. 5 client) expat-1.95.8-11.el5_8.src.rpm expat-2.0.1-11.el6_2.src.rpm expat-1.95.8-11.el5_8 as a component of Red Hat Enterprise Linux Desktop (v. 5 client) expat-2.0.1-11.el6_2 as a component of Red Hat Enterprise Linux HPC Node (v. 6) expat-2.0.1-11.el6_2 as a component of Red Hat Enterprise Linux Desktop (v. 6) expat-2.0.1-11.el6_2 as a component of Red Hat Enterprise Linux HPC Node Optional (v. 6) expat-2.0.1-11.el6_2 as a component of Red Hat Enterprise Linux Server (v. 6) expat-2.0.1-11.el6_2 as a component of Red Hat Enterprise Linux Workstation (v. 6) expat-2.0.1-11.el6_2 as a component of Red Hat Enterprise Linux Desktop Optional (v. 6) expat-1.95.8-11.el5_8 as a component of Red Hat Enterprise Linux (v. 5 server) expat-1.95.8-11.el5_8 as a component of RHEL Desktop Workstation (v. 5 client) A denial of service flaw was found in the implementation of hash arrays in Expat. An attacker could use this flaw to make an application using Expat consume an excessive amount of CPU time by providing a specially-crafted XML file that triggers multiple hash function collisions. To mitigate this issue, randomization has been added to the hash function to reduce the chance of an attacker successfully causing intentional collisions. 2012-01-16T00:00:00Z 2012-03-03T00:00:00Z CVE-2012-0876 5Client-5.8.Z:expat-1.95.8-11.el5_8 5Client-Workstation-5.8.Z:expat-1.95.8-11.el5_8 5Server-5.8.Z:expat-1.95.8-11.el5_8 6Client-6.2.z:expat-2.0.1-11.el6_2 6Client-optional-6.2.z:expat-2.0.1-11.el6_2 6ComputeNode-6.2.z:expat-2.0.1-11.el6_2 6ComputeNode-optional-6.2.z:expat-2.0.1-11.el6_2 6Server-6.2.z:expat-2.0.1-11.el6_2 6Workstation-6.2.z:expat-2.0.1-11.el6_2 Moderate 5.0 AV:N/AC:L/Au:N/C:N/I:N/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-2012-0731.html https://www.redhat.com/security/data/cve/CVE-2012-0876.html CVE-2012-0876 https://bugzilla.redhat.com/show_bug.cgi?id=786617 bz#786617: CVE-2012-0876 expat: hash table collisions CPU usage DoS A memory leak flaw was found in Expat. If an XML file processed by an application linked against Expat triggered a memory re-allocation failure, Expat failed to free the previously allocated memory. This could cause the application to exit unexpectedly or crash when all available memory is exhausted. 2012-03-06T00:00:00Z 2012-03-03T00:00:00Z CVE-2012-1148 5Client-5.8.Z:expat-1.95.8-11.el5_8 5Client-Workstation-5.8.Z:expat-1.95.8-11.el5_8 5Server-5.8.Z:expat-1.95.8-11.el5_8 6Client-6.2.z:expat-2.0.1-11.el6_2 6Client-optional-6.2.z:expat-2.0.1-11.el6_2 6ComputeNode-6.2.z:expat-2.0.1-11.el6_2 6ComputeNode-optional-6.2.z:expat-2.0.1-11.el6_2 6Server-6.2.z:expat-2.0.1-11.el6_2 6Workstation-6.2.z:expat-2.0.1-11.el6_2 Moderate 5.0 AV:N/AC:L/Au:N/C:N/I:N/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-2012-0731.html https://www.redhat.com/security/data/cve/CVE-2012-1148.html CVE-2012-1148 https://bugzilla.redhat.com/show_bug.cgi?id=801648 bz#801648: CVE-2012-1148 expat: Memory leak in poolGrow