Real VNC: User-assisted execution of arbitrary code — GLSA 200903-17

The Real VNC client is vulnerable to execution of arbitrary code when connecting to a malicious server.

Affected packages

Package	net-misc/vnc on all architectures
Affected versions	< 4.1.3
Unaffected versions	>= 4.1.3

Background

Real VNC is a remote desktop viewer display system.

Description

An unspecified vulnerability has been discovered int the CMsgReader::readRect() function in the VNC Viewer component, related to the encoding type of RFB protocol data.

Impact

A remote attacker could entice a user to connect to a malicious VNC server, or leverage Man-in-the-Middle attacks, to cause the execution of arbitrary code with the privileges of the user running the VNC viewer.

Workaround

There is no known workaround at this time.

Resolution

All Real VNC users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=net-misc/vnc-4.1.3"

References

CVE-2008-4770

Release date
March 09, 2009

Latest revision
March 09, 2009: 01

Severity
normal

Exploitable
remote

Bugzilla entries

255225