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TITLE:
Mercur Messaging IMAP SUBSCRIBE Command Buffer Overflow

SECUNIA ADVISORY ID:
SA24619

VERIFY ADVISORY:
http://secunia.com/advisories/24619/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Mercur Messaging 2005
http://secunia.com/product/5035/

DESCRIPTION:
Winny Thomas has discovered a vulnerability in Mercur Messaging 2005,
which can be exploited by malicious users to compromise a vulnerable
system.

The vulnerability is caused due to a boundary error within the IMAP
service (MCRIMAP4.EXE) when processing arguments passed to the
SUBSCRIBE command. This can be exploited to cause a stack-based
buffer overflow via a SUBSCRIBE command with an overly long (greater
than 260 bytes) argument.

Successful exploitation allows execution of arbitrary code.

The vulnerability is confirmed in version 2005 SP4 (File version
5.0.15.0). Other versions may also be affected.

SOLUTION:
Grant only trusted users access to the service.

PROVIDED AND/OR DISCOVERED BY:
Winny Thomas

ORIGINAL ADVISORY:
http://www.milw0rm.com/exploits/3537

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