Description
Stack-based buffer overflow in the ClientConnection::NegotiateProtocolVersion function in vncviewer/ClientConnection.cpp in vncviewer for UltraVNC 1.0.2 and 1.0.4 before 01252008, when in LISTENING mode or when using the DSM plugin, allows remote attackers to execute arbitrary code or cause a denial of service (crash) via a modified size value.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Metasploit 1 module
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UltraVNC 1.0.2 Client (vncviewer.exe) Buffer Overflow
exploit/windows/vnc/ultravnc_viewer_bof
Exploit-DB 1
- UltraVNC 1.0.2 Client - 'vncviewer.exe' Remote Buffer Overflow (Metasploit) EDB-18666 · remote · Mar 26, 2012 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- http://sourceforge.net/project/shownotes.php?release_id=571174&group_id=63887
- 27561 vdb-entry
- VU#721460 third-party-advisory
- 28747 third-party-advisory
- http://forum.ultravnc.info/viewtopic.php?t=11850
- http://ultravnc.svn.sourceforge.net/viewvc/ultravnc/UltraVNC%20Project%20Root/UltraVNC/vncviewer/ClientConnection.cpp?sortby=date&r1=169&r2=168&pathrev=169
- 18666 exploit
- 1019293 vdb-entry
- ADV-2008-0392 vdb-entry