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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
security@gentoo.org 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/