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TITLE:
Novell eDirectory iMonitor HTTP Protocol Stack Buffer Overflow

SECUNIA ADVISORY ID:
SA22519

VERIFY ADVISORY:
http://secunia.com/advisories/22519/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From local network

SOFTWARE:
Novell eDirectory 8.x
http://secunia.com/product/1120/

DESCRIPTION:
Michael Ligh and Ryan Smith have reported a vulnerability in Novell
eDirectory, which can be exploited by malicious people to compromise
a vulnerable system.

A boundary error exists in the HTTP Protocol Stack (httpstk)
component of iMonitor within the "BuildRedirectURL()" function when
processing "Host" HTTP headers. This can be exploited to cause a
stack-based buffer overflow via a specially crafted request with an
overly long "Host" header (more than 64 bytes).

Successful exploitation allows execution of arbitrary code.

The vulnerability is reported in version 8.7.3.8. Other versions may
also be affected.

SOLUTION:
The vendor has issued a beta FTF1.

eDirectory Post 8.7.3.8 FTF1 HTTPSTK (beta):
http://support.novell.com/servlet/filedownload/sec/nsd/edir8738ftf_http.tgz/

PROVIDED AND/OR DISCOVERED BY:
Michael Ligh and Ryan Smith.

ORIGINAL ADVISORY:
mnin.org:
http://www.mnin.org/advisories/2006_novell_httpstk.pdf

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