Gentoo: 201401-25 ldns: Arbitrary code execution
Posted by Benjamin D. Thomas   
Gentoo A heap-based buffer overflow in ldns might allow remote attackers to execute arbitrary code or cause a Denial of Service condition.
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Gentoo Linux Security Advisory                           GLSA 201401-25
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                                            http://security.gentoo.org/
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 Severity: Normal
    Title: ldns: Arbitrary code execution
     Date: January 21, 2014
     Bugs: #384249
       ID: 201401-25

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Synopsis
========

A heap-based buffer overflow in ldns might allow remote attackers to
execute arbitrary code or cause a Denial of Service condition.

Background
==========

ldns is a fast DNS library with the goal to simplify DNS programming
and to allow developers to easily create software conforming to current
RFCs and Internet drafts.

Affected packages
=================

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  net-libs/ldns                < 1.6.11                  >= 1.6.11

Description
===========

ldns contains a heap-based buffer overflow in the
ldns_rr_new_frm_str_internal function.

Impact
======

A remote attacker could execute arbitrary code or cause a Denial of
Service condition with a crafted Resource Record.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All ldns users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-libs/ldns-1.6.11"

Packages which depend on this library may need to be recompiled. Tools
such as revdep-rebuild may assist in identifying these packages.

NOTE: This is a legacy GLSA. Updates for all affected architectures are
available since October 11, 2011. It is likely that your system is
already no longer affected by this issue.

References
==========

[ 1 ] CVE-2011-3581
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-3581

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

 http://security.gentoo.org/glsa/glsa-201401-25.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License

Copyright 2014 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5