Multiple buffer overflows in (a) UltraVNC (aka Ultr@VNC) 1.0.1 and earlier and (b) tabbed_viewer 1.29 (1) allow user-assisted remote attackers to execute arbitrary code via a malicious server that sends a long string to a client that connects on TCP port 5900, which triggers an overflow in Log::ReallyPrint; and (2) allow remote attackers to cause a denial of service (server crash) via a long HTTP GET request to TCP port 5800, which triggers an overflow in VNCLog::ReallyPrint.
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 |
|---|---|
| https://www.exploit-db.com/exploits/1642 | exploit |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/25648 | vdb entry |
| https://www.exploit-db.com/exploits/1643 | exploit |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/25650 | vdb entry |
| http://secunia.com/advisories/19513 | third party advisory vendor advisory |
| http://www.securityfocus.com/archive/1/430711/100/0/threaded | mailing list |
| http://www.securityfocus.com/archive/1/430287/100/0/threaded | mailing list |
| http://www.vupen.com/english/advisories/2006/1240 | vdb entry vendor advisory |
| http://securityreason.com/securityalert/674 | third party advisory |
| http://www.securityfocus.com/archive/1/429930/100/0/threaded | mailing list |
| http://lists.grok.org.uk/pipermail/full-disclosure/2006-April/044901.html | mailing list |
| http://www.securityfocus.com/bid/17378 | vdb entry exploit |