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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2014.0539 Important: libyaml security update 22 April 2014 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: libyaml Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 6 Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Denial of Service -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2014-2525 CVE-2013-6393 Reference: ESB-2014.0397 ESB-2014.0130.2 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2014-0415.html - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: libyaml security update Advisory ID: RHSA-2014:0415-01 Product: Red Hat Common Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-0415.html Issue date: 2014-04-17 CVE Names: CVE-2013-6393 CVE-2014-2525 ===================================================================== 1. Summary: Updated libyaml packages that fix two security issues are now available for Red Hat Common for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having Important 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. 2. Relevant releases/architectures: Red Hat Common for RHEL Server (v. 6) - i386, x86_64 3. Description: YAML is a data serialization format designed for human readability and interaction with scripting languages. LibYAML is a YAML parser and emitter written in C. A buffer overflow flaw was found in the way the libyaml library parsed URLs in YAML documents. An attacker able to load specially crafted YAML input to an application using libyaml could cause the application to crash or, potentially, execute arbitrary code with the privileges of the user running the application. (CVE-2014-2525) An integer overflow flaw was found in the way the libyaml library handled excessively long YAML tags. An attacker able to load specially crafted YAML input to application using libyaml could cause the application to crash or, potentially, execute arbitrary code with the privileges of the user running the application. (CVE-2013-6393) Red Hat would like to thank oCERT for reporting the CVE-2014-2525 issue. oCERT acknowledges Ivan Fratric of the Google Security Team as the original reporter. The CVE-2013-6393 issue was discovered by Florian Weimer of the Red Hat Product Security Team. Note: In their default configuration, applications distributed via the Red Hat Common channel do not use the libyaml library for parsing YAML, and are therefore not vulnerable to these issues. All libyaml users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. All running applications linked against the libyaml library must be restarted for this update to take effect. 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/site/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 1033990 - CVE-2013-6393 libyaml: heap-based buffer overflow when parsing YAML tags 1078083 - CVE-2014-2525 libyaml: heap-based buffer overflow when parsing URLs 6. Package List: Red Hat Common for RHEL Server (v. 6): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/RH-COMMON/SRPMS/libyaml-0.1.3-1.4.el6.src.rpm i386: libyaml-0.1.3-1.4.el6.i686.rpm libyaml-debuginfo-0.1.3-1.4.el6.i686.rpm libyaml-devel-0.1.3-1.4.el6.i686.rpm x86_64: libyaml-0.1.3-1.4.el6.x86_64.rpm libyaml-debuginfo-0.1.3-1.4.el6.x86_64.rpm libyaml-devel-0.1.3-1.4.el6.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-2013-6393.html https://www.redhat.com/security/data/cve/CVE-2014-2525.html https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2014 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFTT8pbXlSAg2UNWIIRAkrjAJwPLr2lxhdGCyABqHFXbIDKvQsToQCeLZ8X pJ6m5cusPwlWtLSs7tFvgFU= =7Rzj - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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