Secunia Advisory: SA25547
Release Date: 2007-06-07
Critical: Extremely critical
Impact: System access
Where: From remote
Solution Status: Unpatched
Software: Yahoo! Messenger 8.x
Description:
Danny has discovered two vulnerabilities in Yahoo! Messenger, which can be exploited by malicious people to compromise a user's system.
1) A boundary error within the Yahoo! Webcam Upload (ywcupl.dll) ActiveX control can be exploited to cause a stack-based buffer overflow by assigning an overly long string to the "Server" property and then calling the "Send()" method.
2) A boundary error within the Yahoo! Webcam Viewer (ywcvwr.dll) ActiveX control can be exploited to cause a stack-based buffer overflow by assigning an overly long string to the "Server" property and then calling the "Receive()" method.
Successful exploitation of the vulnerabilities allows execution of arbitrary code.
The vulnerabilities are confirmed in version 8.1.0.249. Other versions may also be affected.
Solution:
Set the kill-bit for the affected ActiveX controls.
Bolletino Secunia
Release Date: 2007-06-07
Critical: Extremely critical
Impact: System access
Where: From remote
Solution Status: Unpatched
Software: Yahoo! Messenger 8.x
Description:
Danny has discovered two vulnerabilities in Yahoo! Messenger, which can be exploited by malicious people to compromise a user's system.
1) A boundary error within the Yahoo! Webcam Upload (ywcupl.dll) ActiveX control can be exploited to cause a stack-based buffer overflow by assigning an overly long string to the "Server" property and then calling the "Send()" method.
2) A boundary error within the Yahoo! Webcam Viewer (ywcvwr.dll) ActiveX control can be exploited to cause a stack-based buffer overflow by assigning an overly long string to the "Server" property and then calling the "Receive()" method.
Successful exploitation of the vulnerabilities allows execution of arbitrary code.
The vulnerabilities are confirmed in version 8.1.0.249. Other versions may also be affected.
Solution:
Set the kill-bit for the affected ActiveX controls.
Bolletino Secunia