An Access Control vulnerability exists in BigAntSoft BigAnt office messenger 5.6 via im_webserver, which could let a malicious user upload PHP Trojan files.

Integer overflow in the CYImage::LoadJPG method in YImage.dll in Yahoo! Messenger before 11.5.0.155, when photo sharing is enabled, might allow remote attackers to execute arbitrary code via a crafted JPG image that triggers a heap-based buffer overflow.

Unspecified vulnerability in the Chat Room functionality in Yahoo! Messenger 8.1.0.239 and earlier allows remote attackers to cause a denial of service via unspecified vectors. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.

Buffer overflow in the YMMAPI.YMailAttach ActiveX control (ymmapi.dll) before 2005.1.1.4 in Yahoo! Messenger allows remote attackers to execute arbitrary code via a crafted HTML document. NOTE: some details were obtained from third party information.

The Logfile feature in Yahoo! Messenger 5.x through 6.0 can be activated by a YMSGR: URL and writes all output to a single ypager.log file, even when there are multiple users, and does not properly warn later users that the feature has been enabled, which allows local users to obtain sensitive information from other users.

The YMSGR URL handler in Yahoo! Messenger 5.x through 6.0 allows remote attackers to cause a denial of service (disconnect) via a room login or a room join request packet with a third : (colon) and an & (ampersand), which causes Messenger to send a corrupted packet to the server, which triggers a disconnect from the server.

Buffer overflow in Yahoo! Messenger allows remote attackers to execute arbitrary code via the offline mode.

The Audio Setup Wizard (asw.dll) in Yahoo! Messenger 6.0.0.1750, and possibly other versions, allows attackers to arbitrary code by placing a malicious ping.exe program into the Messenger program directory, which is installed with weak default permissions.

Yahoo! Messenger 6.0.0.1750, and possibly other versions before 6.0.0.1921, does not properly display long filenames in file dialog boxes, which could allow remote attackers to trick users into downloading and executing programs via file names containing a large number of spaces and multiple file extensions.

Buffer overflow in Yahoo! Messenger 5.6 allows remote attackers to cause a denial of service (crash) via a file send request (sendfile) with a large number of "%" (percent) characters after the Yahoo ID.