UltraVNC VNCViewer 'FileTransfer.cpp' Multiple Remote Buffer Overflow Vulnerabilities

BID:27687

Info

UltraVNC VNCViewer 'FileTransfer.cpp' Multiple Remote Buffer Overflow Vulnerabilities

Bugtraq ID: 27687
Class: Boundary Condition Error
CVE: CVE-2008-5001
Remote: Yes
Local: No
Published: Feb 08 2008 12:00AM
Updated: Nov 13 2008 04:04PM
Credit: The vendor reported these issues.
Vulnerable: UltraVNC UltraVNC 1.0.2
UltraVNC UltraVNC 104 RC8
UltraVNC UltraVNC 104 RC7
UltraVNC UltraVNC 104 RC6
Not Vulnerable:

Discussion

UltraVNC VNCViewer 'FileTransfer.cpp' Multiple Remote Buffer Overflow Vulnerabilities

UltraVNC VNCViewer is affected by multiple remote buffer-overflow vulnerabilities because the application fails to properly validate user-supplied string lengths before copying them into static process buffers.

An attacker might leverage these issues to execute arbitrary code on the affected computer with the privileges of the user running the vulnerable application. Failed exploit attempts may lead to a denial-of-service condition.

UltraVNC 1.0.2 and UltraVNC 104 release candidates released prior to February 4, 2008 are vulnerable to these issues.

NOTE: This issue affects only VNCViewer. The UltraVNC server is not affected.

Exploit / POC

UltraVNC VNCViewer 'FileTransfer.cpp' Multiple Remote Buffer Overflow Vulnerabilities

Currently we are not aware of any working exploits for these issues. If you feel we are in error or if you are aware of more recent information, please mail us at: [email protected].

Solution / Fix

UltraVNC VNCViewer 'FileTransfer.cpp' Multiple Remote Buffer Overflow Vulnerabilities

Solution:
The vendor released an update to address these issues. Please see the references for more information.


UltraVNC UltraVNC 104 RC7

UltraVNC UltraVNC 104 RC6

UltraVNC UltraVNC 104 RC8

UltraVNC UltraVNC 1.0.2

References

UltraVNC VNCViewer 'FileTransfer.cpp' Multiple Remote Buffer Overflow Vulnerabilities

References:

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