GLSA 201607-13: libbsd: Arbitrary code execution

http://security.gentoo.org/

Severity:	normal
Title:	libbsd: Arbitrary code execution
Date:	07/20/2016
Bugs:	#573160
ID:	201607-13

Synopsis

A buffer overflow in libbsd might allow remote attackers to execute arbitrary code.

Background

This library provides useful functions commonly found on BSD systems, and lacking on others like GNU systems, thus making it easier to port projects with strong BSD origins, without needing to embed the same code over and over again on each project.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
dev-libs/libbsd	< 0.8.2	>= 0.8.2	All supported architectures

Description

libbsd contains a buffer overflow in the fgetwln() function. An if statement, which is responsible for checking the necessity to reallocate memory in the target buffer, is off by one therefore an out of bounds write occurs.

Impact

Remote attackers could potentially execute arbitrary code with the privileges of the process.

Workaround

There is no known workaround at this time.

Resolution

All libbsd users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --verbose --oneshot ">=dev-libs/libbsd-0.8.2"

References

CVE-2016-2090

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201607-13.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.