GLSA 201702-19: TigerVNC: Buffer overflow

http://security.gentoo.org/

Severity:	normal
Title:	TigerVNC: Buffer overflow
Date:	02/20/2017
Bugs:	#606998
ID:	201702-19

Synopsis

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

Background

TigerVNC is a high-performance VNC server/client.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-misc/tigervnc	< 1.7.1	>= 1.7.1	All supported architectures

Description

A buffer overflow vulnerability in ModifiablePixelBuffer::fillRect in vncviewer was found.

Impact

A remote attacker, utilizing a malicious VNC server, could execute arbitrary code with the privileges of the user running the client or cause a Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All TigerVNC users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=net-misc/tigervnc-1.7.1"

References

CVE-2017-5581

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201702-19.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.