[NEWS] Novell eDirectory dhost Integer Overflow Code Execution Vulnerability

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Novell eDirectory dhost Integer Overflow Code Execution Vulnerability
------------------------------------------------------------------------


SUMMARY

A vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Novell eDirectory. Authentication is not
required to exploit this vulnerability.

DETAILS

Vulnerable Systems:
* Novell eDirectory version 8.8 for All Platforms
* Novell eDirectory version 8.7.3 for All Platforms

The specific flaw exists within dhost.exe, bound by default to TCP port
524. Flawed arithmetic applied to a user-supplied value results in an
integer overflow and subsequently a complete stack smash allowing an
attacker to execute arbitrary code via SEH redirection.

Vendor Response:
Novell has issued an update to correct this vulnerability. More details
can be found at:

<http://www.novell.com/support/search.do?cmd=displayKC&sliceId=SAL_Public&externalId=3694858> http://www.novell.com/support/search.do?cmd=displayKC&sliceId=SAL_Public&externalId=3694858

Solution:
To resolve this issue in eDirectory 8.8.2:
* Apply eDir 8.8.2 ftf2 or later

To resolve this issue in eDirectory 8.7.3:
* Apply eDir 8.7.3 SP10b or later

Disclosure Timeline:
2007-12-04 - Vulnerability reported to vendor
2008-07-10 - Coordinated public release of advisory


ADDITIONAL INFORMATION

The information has been provided by <mailto:zdi-disclosures@xxxxxxxx>
TippingPoint, The Zero Day Initiative (ZDI).
The original article can be found at:
<http://www.zerodayinitiative.com/advisories/ZDI-08-041>
http://www.zerodayinitiative.com/advisories/ZDI-08-041



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