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AUSCERT External Security Bulletin Redistribution
ESB-2001.308 -- Microsoft Security Bulletin MS01-039
Services for Unix 2.0 Telnet and NFS Services Contain Memory Leaks
25 July 2001
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AusCERT Security Bulletin Summary
---------------------------------
Product: Services for Unix 2.0
Vendor: Microsoft
Operating System: Windows
Impact: Denial of Service
Access Required: Remote
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Title: Services for Unix 2.0 Telnet and NFS Services Contain
Memory Leaks
Date: 23 July 2001
Software: Services for Unix 2.0
Impact: Denial of service
Bulletin: MS01-039
Microsoft encourages customers to review the Security Bulletin at:
http://www.microsoft.com/technet/security/bulletin/MS01-039.asp.
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Issue:
======
Among the components provided by Services for Unix (SFU) 2.0 are
services that implement the NFS (Network File System) and Telnet
protocols. Both services contain memory leaks that could be triggered
by a user request. An attacker who repeatedly sent such a request
could
deplete the kernel memory on the server to the point where
performance
slowed and the system could potentially fail.
Mitigating Factors:
====================
- Only the implementations provided in SFU 2.0 are affected.
In particular, the Telnet services provided in Windows NT(r) 4.0
and Windows(r) 2000 are not affected by the vulnerability.
- There is no capability via the vulnerability to usurp any
administrative control over the server or compromise any
data on it.
Patch Availability:
===================
- A patch is available to fix this vulnerability. Please read the
Security Bulletin
http://www.microsoft.com/technet/security/bulletin/ms01-039.asp
for information on obtaining this patch.
Acknowledgment:
===============
- Peter Grundl
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THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED
"AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL
WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
SHALL
MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES
WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL,
LOSS
OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION
OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGES.
SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR
CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY
NOT
APPLY.
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