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Gentoo Linux Security Advisory                           GLSA 201604-04
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: libksba: Multiple vulnerabilities
     Date: April 26, 2016
     Bugs: #546464
       ID: 201604-04

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Synopsis
========

Multiple vulnerabilities have been found in libksba, allowing a
possible Denial of Service and unspecified other vectors through
integer overflows.

Background
==========

Libksba is a X.509 and CMS (PKCS#7) library.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  dev-libs/libksba             < 1.3.3                    >= 1.3.3

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

libksba is vulnerable to two integer overflows and a Denial of Service
vulnerability.  Please read the references for additional details.

Impact
======

Remote attackers could cause Denial of Service or unspecified other
vectors through various integer overflows.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All libksba users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=dev-libs/libksba-1.3.3"

References
==========

[ 1 ] Denial of Service due to stack overflow in src/ber-decoder.c

http://git.gnupg.org/cgi-bin/gitweb.cgi?p=libksba.git;a=commit;h=07116a314f4dcd4d96990bbd74db95a03a9f650a
[ 2 ] Integer overflow in the BER decoder src/ber-decoder.c

http://git.gnupg.org/cgi-bin/gitweb.cgi?p=libksba.git;a=commit;h=aea7b6032865740478ca4b706850a5217f1c3887
[ 3 ] Integer overflow in the DN decoder src/dn.c

http://git.gnupg.org/cgi-bin/gitweb.cgi?p=libksba.git;a=commit;h=243d12fdec66a4360fbb3e307a046b39b5b4ffc3

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

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

 https://security.gentoo.org/glsa/201604-04

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 2016 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