Security Advisory Important: ruby193-libyaml security update

Advisory: RHSA-2014:0355-1
Type: Security Advisory
Severity: Important
Issued on: 2014-04-02
Last updated on: 2014-04-02
Affected Products: Red Hat Software Collections 1 for RHEL 6
CVEs (cve.mitre.org): CVE-2013-6393
CVE-2014-2525

Details

Updated ruby193-libyaml packages that fix two security issues are now
available for Red Hat Software Collections 1.

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.

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 ruby193-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.


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

Updated packages

Red Hat Software Collections 1 for RHEL 6

SRPMS:
ruby193-libyaml-0.1.4-5.1.el6.src.rpm     MD5: 18ff8d9810a11025852e0875d223989f
SHA-256: 4e1b1e4770ecb9028de53b846faa0d6e13290c49e3aa4b3d689f54ac8db46b40
 
x86_64:
ruby193-libyaml-0.1.4-5.1.el6.x86_64.rpm     MD5: aa528bc83601a48e12377345510d92e1
SHA-256: 0868979eedabb76633e03058a29993f640ca1913622257b59803579f66e707c6
ruby193-libyaml-debuginfo-0.1.4-5.1.el6.x86_64.rpm     MD5: 41819582e8d18f1fe77424c4873650c7
SHA-256: 6f481274992ac710fc995e9829d5ad74a18b8f6df2f60265a3460fc3dc7bf7fd
ruby193-libyaml-devel-0.1.4-5.1.el6.x86_64.rpm     MD5: 931251d5c22be765030f2d64db3594a9
SHA-256: 1aacb47daeee5bbabe781e71e7c8a2c657bdde365f63166eb2306863c5e30022
 
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

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


References



These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from:
https://www.redhat.com/security/team/key/#package

The Red Hat security contact is secalert@redhat.com. More contact details at http://www.redhat.com/security/team/contact/