6.8 - RHSA-2014:0354

Problem Description:

Updated libyaml packages that fix two security issues are now available for Red Hat Enterprise Linux OpenStack Platform 4.

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:

OpenStack 4 - 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.

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