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.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
| Link | Tags |
|---|---|
| http://sourceforge.net/project/shownotes.php?release_id=571174&group_id=63887 | |
| http://www.securityfocus.com/bid/27561 | exploit vdb entry patch |
| http://www.kb.cert.org/vuls/id/721460 | third party advisory us government resource |
| http://secunia.com/advisories/28747 | third party advisory patch vendor 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 | |
| http://www.exploit-db.com/exploits/18666 | exploit |
| http://www.securitytracker.com/id?1019293 | vdb entry |
| http://www.vupen.com/english/advisories/2008/0392 | vdb entry |