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TITLE:
Mercury Mail Transport System IMAP Data Handling Buffer Overflow

SECUNIA ADVISORY ID:
SA24367

VERIFY ADVISORY:
http://secunia.com/advisories/24367/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Mercury Mail Transport System 4.x
http://secunia.com/product/4348/

DESCRIPTION:
mu-b has discovered a vulnerability in Mercury Mail Transport System,
which can be exploited by malicious people to compromise a vulnerable
system.

The vulnerability is caused due to a boundary error when processing
IMAP continuation data from the client. This can be exploited to
cause a stack-based buffer overflow via a specially crafted series of
commands and data sent to the IMAP service.

This vulnerability may be related to:
SA22857

Successful exploitation allows execution of arbitrary code.

The vulnerability is reported in version 4.01b and confirmed in
version 4.01a. Other versions may also be affected.

SOLUTION:
Restrict access to the IMAP service.

PROVIDED AND/OR DISCOVERED BY:
mu-b

ORIGINAL ADVISORY:
http://lists.grok.org.uk/pipermail/full-disclosure/2007-March/052802.html

OTHER REFERENCES:
SA22857:
http://secunia.com/advisories/22857

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About:
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