As I couldn't find this article in English so I decided to write my translation here.
Another critical vulnerability was found in ICQ 6. It is simply needed to send specially formatted message to use it. The sample of such message is:
"%020000000s"
There is no way to eliminate this error for now. So it is recommended to stop using dangerous version of ICQ until the fix will be released.
It is not the first time the vulnerability was found in the instant messengers. There were 16 vulnerabilities published in 2007. 5 of them (in Trillian, MSN Messenger, Miranda and Skype) were allowing to execute program code.
Source article:
http://www.securitylab.ru/news/347737.php If this happens try to remove contact's history from your ICQ program folder or use ICQ2Go to remove the contact causing ICQ crash from your contact list.
ICQ2Go:
Flash version -
http://www.icq.com/icq2go/flicq-content.htmlJava version -
http://www.icq.com/icq2go/web.htmlAbout ICQ2Go -
http://go.icq.com