GLSA 202107-03: libqb: Insecure temporary file

http://security.gentoo.org/

Severity:	high
Title:	libqb: Insecure temporary file
Date:	07/03/2021
Bugs:	#699860
ID:	202107-03

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	Architecture(s)
sys-cluster/libqb	< 1.0.5	>= 1.0.5	All supported architectures

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

CVE-2019-12779

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-202107-03.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.