9th Apr 2003 [SBWID-6125]
COMMAND
Opera Buffer Overflow
SYSTEMS AFFECTED
Tested version : Opera 7.02 Build 2668
PROBLEM
David F. Madrid [conde0(at)telefonica(dot)net] found following:
Opera web browser has an unchecked buffer in his code that allow a
malicious website to crash it and in certain circumstances , execute
code with user priviliges .
To reproduce the bug open this link
http://usuarios.lycos.es/idoru/aaAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA.zip
Opera crashes with an access violation . Instruction pointer EIP is
overwritten by the file name converted to unicode . That makes only
possible to reference certain addresses in memory to execute . To place
your code to execute in a valid address you have to assign it to an
enviroment variable .That place your code in an address that can be
referenced by EIP ( ~00010040 )
SOLUTION
unknown