The DownloaderActiveX Control (DownloaderActiveX.ocx) in Icona SpA C6 Messenger 1.0.0.1 allows remote attackers to force the download and execution of arbitrary files via a URL in the propDownloadUrl parameter with the propPostDownloadAction parameter set to "run."

The gg protocol handler in Gadu-Gadu, when this product is installed but not running, does not properly handle the skin attribute, which allows remote attackers to cause a denial of service (resource consumption) via unspecified network traffic.

Multiple buffer overflows in the HandleEmotsConfig function in the GG Client in Gadu-Gadu 7.7 Build 3669 allow user-assisted remote attackers to execute arbitrary code or cause a denial of service (gg.exe process crash) via a long string in an emots.txt file.

Gadu-Gadu does not properly perform protocol handling, which allows remote attackers to conduct cross-site request forgery (CSRF) attacks and add arbitrary user accounts or cause a denial of service as administrators via an unspecified "crafted link," possibly related to the gg protocol.

The embedded Internet Explorer server control in AOL Instant Messenger (AIM) 6.5.3.12 and earlier allows remote attackers to execute arbitrary code via unspecified web script or HTML in an instant message, related to AIM's filtering of "specific tags and attributes" and the lack of Local Machine Zone lockdown. NOTE: this issue reportedly exists because of an incomplete fix for CVE-2007-4901.

The embedded Internet Explorer server control in AOL Instant Messenger (AIM) 6.1.41.2 and 6.2.32.1, AIM Pro, and AIM Lite does not properly constrain the use of mshtml.dll's web script and HTML functionality for incoming instant messages, which allows remote attackers to place HTML into unexpected contexts or execute arbitrary code, as demonstrated by writing arbitrary HTML to a notification window, and writing contents of arbitrary local image files to this window via IMG SRC.

AOL Instant Messenger (AIM) 6.1.32.1 on Windows XP allows remote attackers to cause a denial of service (application crash) via a malformed header value in a SIP INVITE message, a different vulnerability than CVE-2007-3350.

AOL Instant Messenger (AIM) 6.1.32.1 on Windows XP allows remote attackers to cause a denial of service (application hang) via a flood of spoofed SIP INVITE requests.

Directory traversal vulnerability in AOL Instant Messenger (AIM) 5.9 and earlier, and ICQ 5.1 and probably earlier, allows user-assisted remote attackers to write files to arbitrary locations via a .. (dot dot) in a filename in a file transfer operation.

PHP file inclusion vulnerability in php121db.php in PHP121 Instant Messenger 2.2 allows remote attackers to execute arbitrary PHP code via a UNC share pathname or a local file pathname in the php121dir parameter, which is accessed by the file_exists function.