Multiple stack-based multiple buffer overflows in the BRWOSSRE2UC.dll ActiveX Control in Sina UC2006 and earlier allow remote attackers to execute arbitrary code via a long string in the (1) astrVerion parameter to the SendChatRoomOpt function or (2) the astrDownDir parameter to the SendDownLoadFile function.
https://exchange.xforce.ibmcloud.com/vulnerabilities/31350
https://exchange.xforce.ibmcloud.com/vulnerabilities/31348
http://www.vupen.com/english/advisories/2007/0093
http://www.securityfocus.com/bid/21958
http://www.securityfocus.com/archive/1/456378/100/0/threaded