RealVNC VNC Viewer < 4.1.3/4.4.3 Arbitrary Command Execution
High Nessus Plugin ID 34461
SynopsisThe remote Windows host has an application that may allow execution of arbitrary code.
DescriptionThe version of RealVNC's VNC Viewer installed on the remote Windows host is affected by multiple issues :
- An error in the 'CMsgReader::readRect()' function in 'common/rfb/CMsgReader.cxx' that comes into play when processing encoding types, may allow arbitrary code execution on the remote system. If an attacker can trick a user on the remote host into connecting to a malicious server, he can exploit this issue using specially crafted messages to compromise that host.
- By tricking a user to connect to a malicious VNC server, it may be possible for an attacker to execute arbitrary code on a remote system by sending malicious RFB protocol data to the remote VNC Viewer component. Note VNC servers are not affected by this issue.
SolutionUpgrade to RealVNC VNC Viewer Free Edition 4.1.3 / Personal Edition 4.4.3 / Enterprise Edition 4.4.3 or later.