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Gentoo 201702-19 Update: TigerVNC Buffer Overflow Vulnerability Alert

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Calendar Grey February 21, 2017
Scroller Gentoo
Gentoo GLSA 202303-07 alerts users of a medium severity stack overflow in Remmina allowing for potential remote code execution vulnerabilities.
A buffer overflow in TigerVNC might allow remote attackers to execute arbitrary code.

Summary

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

Topics%20covered

Topics Covered

security advisory Gentoo buffer overflow remote code execution normal TigerVNC

Resolution

All TigerVNC users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/tigervnc-1.7.1"

References

[ 1 ] CVE-2017-5581 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-5581

Availability

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

Severity: Normal
Title: TigerVNC: Buffer overflow
Date: February 20, 2017
Bugs: #606998
ID: 201702-19

Topics%20covered

Topics Covered

security advisory Gentoo buffer overflow remote code execution normal TigerVNC

Synopsis

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

Background

TigerVNC is a high-performance VNC server/client.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/tigervnc < 1.7.1 >= 1.7.1

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.