AOH :: HP Unsorted A :: TB11575.HTM

Active Directory low risk vuln



Low Risk Vulnerability in Active Directory
Low Risk Vulnerability in Active Directory



Peter Winter-Smith of NGSSoftware has discovered a low risk vulnerability in
Active Directory which can allow an unauthenticated user to cause a denial
of service condition on any affected system.

The only affected platform is Windows 2000 with Active Directory. Windows
2003 Server is NOT affected by this issue.

The vulnerability occurs when Active Directory attempts to parse an LDAP
request containing the ASN.1 type 0x08. As soon as this type is encountered,
the hosting system reaches a 100% CPU usage condition from which it does not
seem to recover. Making multiple such requests will render the system
completely unresponsive.

This issue has been fixed in the Microsoft bulletin MS07-039, which can be
found at:

http://www.microsoft.com/technet/security/Bulletin/MS07-039.mspx 

NGSSoftware Insight Security Research
http://www.ngssoftware.com/ 
http://www.databasesecurity.com/ 
http://www.nextgenss.com/ 
+44(0)208 401 0070
--
E-MAIL DISCLAIMER

The information contained in this email and any subsequent
correspondence is private, is solely for the intended recipient(s) and
may contain confidential or privileged information. For those other than
the intended recipient(s), any disclosure, copying, distribution, or any
other action taken, or omitted to be taken, in reliance on such
information is prohibited and may be unlawful. If you are not the
intended recipient and have received this message in error, please
inform the sender and delete this mail and any attachments.

The views expressed in this email do not necessarily reflect NGS policy.
NGS accepts no liability or responsibility for any onward transmission
or use of emails and attachments having left the NGS domain.

NGS and NGSSoftware are trading names of Next Generation Security
Software Ltd. Registered office address: 52 Throwley Way, Sutton, SM1
4BF with Company Number 04225835 and VAT Number 783096402

The entire AOH site is optimized to look best in Firefox® 3 on a widescreen monitor (1440x900 or better).
Site design & layout copyright © 1986-2014 AOH
We do not send spam. If you have received spam bearing an artofhacking.com email address, please forward it with full headers to abuse@artofhacking.com.