Yahoo! Messenger 8.1.0.209 and 8.1.0.402 allows remote attackers to cause a denial of service (application crash) via certain file-transfer packets, possibly involving a buffer overflow, as demonstrated by ym8bug.exe.  NOTE: this might be related to CVE-2007-4515.  NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.