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Gentoo Linux Security Advisory                           GLSA 202107-03
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                                           https://security.gentoo.org/
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 Severity: High
    Title: libqb: Insecure temporary file
     Date: July 03, 2021
     Bugs: #699860
       ID: 202107-03

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Synopsis
========

An insecure temporary file usage has been reported in libqb possibly
allowing local code execution.

Background
==========

libqb is a library with the primary purpose of providing
high-performance, reusable features for client-server architecture,
such as logging, tracing, inter-process communication (IPC), and
polling.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  sys-cluster/libqb            < 1.0.5                    >= 1.0.5 

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

It was discovered that libqb used predictable filenames (under /dev/shm
and /tmp) without O_EXCL.

Impact
======

A local attacker could perform symlink attacks to overwrite arbitrary
files with the privileges of the user running the application linked
against libqb.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All libqb users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=sys-cluster/libqb-1.0.5"

References
==========

[ 1 ] CVE-2019-12779
      https://nvd.nist.gov/vuln/detail/CVE-2019-12779

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

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

 https://security.gentoo.org/glsa/202107-03

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
[email protected] or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2021 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.

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