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[RHSA-2014:0415-01] Important: libyaml security update

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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

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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 . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2014 Red Hat, Inc.

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