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TITLE:
Mercur Messaging IMAP NTLM Authentication Buffer Overflow
Vulnerabilities

SECUNIA ADVISORY ID:
SA24596

VERIFY ADVISORY:
http://secunia.com/advisories/24596/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From remote

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

DESCRIPTION:
mu-b has discovered some vulnerabilities in Mercur Messaging 2005,
which can be exploited by malicious people to cause a DoS (Denial of
Service) or to potentially compromise a vulnerable system.

The vulnerabilities are caused due to boundary errors within the IMAP
service (MCRIMAP4.EXE) when processing NTLM authentication data. These
can be exploited to cause a stack-based buffer overflow via a
specially crafted series of commands and data.

Successful exploitation may allow execution of arbitrary code.

The vulnerabilities are confirmed in version 2005 SP4 (File version
5.0.15.0). 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

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About:
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