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Gentoo Linux Security Advisory                           GLSA 201406-04
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                                            http://security.gentoo.org/
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 Severity: Normal
    Title: SystemTap: Denial of Service
     Date: June 05, 2014
     Bugs: #405345
       ID: 201406-04

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Synopsis
========

A vulnerability in SystemTap could allow a local attacker to create a
Denial of Service condition.

Background
==========

SystemTap is a kernel profiling and instrumentation tool.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  dev-util/systemtap            < 2.0                       >= 2.0

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

SystemTap does not properly handle DWARF expressions when unwinding the
stack.

Impact
======

A local attacker with SystemTap permissions could trigger a kernel
panic, causing a Denial of Service condition.

Workaround
==========

Disabling unprivileged mode is a temporary workaround for this
vulnerability.

Resolution
==========

All SystemTap users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=dev-util/systemtap-2.0"

References
==========

[ 1 ] CVE-2012-0875
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-0875

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

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

 http://security.gentoo.org/glsa/glsa-201406-04.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


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