Opera 6.0/7.0 - 'Username' URI Warning Dialog Buffer Overflow

source: https://www.securityfocus.com/bid/6811/info

The Opera browser for Win32 (and possibly other) systems is prone to a remotely exploitable buffer overflow condition. For security purposes, Opera will display a warning any time a user of the client visits a link containing a username as part of the URI. An excessively long username will trigger a buffer overflow condition related to this security feature that may overwrite the stack frame of the affected function. Attackers may exploit this vulnerability to execute instructions on client systems. 

https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/22239.tgz