Yahoo · Yahoo! Messenger · CVE-2005-1618
**Name of the Vulnerable Software and Affected Versions**
Yahoo! Messenger versions 5.x through 6.0
**Description**
The issue allows remote attackers to cause a denial of service, resulting in a disconnect from the server. This is achieved by sending 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.
**Recommendations**
For Yahoo! Messenger versions 5.x through 6.0, consider restricting the use of the YMSGR URL handler until a patch is available. As a temporary workaround, avoid using the room login or room join request functionality with packets containing a third colon and an ampersand to minimize the risk of exploitation.