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  3. Microsoft Windows RPCSS Multi-thread Race Condition Vulnerability

Microsoft Windows RPCSS Multi-thread Race Condition Vulnerability

Risk

High

Date Discovered

October 10, 2003

Description

It has been reported that a variant attack in the RPCSS service of Microsoft Windows exists. Because of this, it may be possible for an attacker to mount denial of service attacks and execute arbitrary code on the affected system. The source of the issue is reportedly a multi-thread race condition that occurs when handling a large number of RPC request. It has been confirmed by the vendor that this issue may be leveraged to execute arbitrary code on the affected system. This may allow an attacker to gain control of the affected system.

Technologies Affected

  • Avaya DefinityOne Media Servers
  • Avaya IP600 Media Servers
  • Avaya S3400 Message Application Server
  • Avaya S8100 Media Servers
  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Advanced Server SP1
  • Microsoft Windows 2000 Advanced Server SP2
  • Microsoft Windows 2000 Advanced Server SP3
  • Microsoft Windows 2000 Advanced Server SP4
  • Microsoft Windows 2000 Datacenter Server
  • Microsoft Windows 2000 Datacenter Server SP1
  • Microsoft Windows 2000 Datacenter Server SP2
  • Microsoft Windows 2000 Datacenter Server SP3
  • Microsoft Windows 2000 Datacenter Server SP4
  • Microsoft Windows 2000 Professional
  • Microsoft Windows 2000 Professional SP1
  • Microsoft Windows 2000 Professional SP2
  • Microsoft Windows 2000 Professional SP3
  • Microsoft Windows 2000 Professional SP4
  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Server SP1
  • Microsoft Windows 2000 Server SP2
  • Microsoft Windows 2000 Server SP3
  • Microsoft Windows 2000 Server SP4
  • Microsoft Windows NT 4.0
  • Microsoft Windows NT 4.0 SP1
  • Microsoft Windows NT 4.0 SP1 alpha
  • Microsoft Windows NT 4.0 SP2
  • Microsoft Windows NT 4.0 SP2 alpha
  • Microsoft Windows NT 4.0 SP3
  • Microsoft Windows NT 4.0 SP3 alpha
  • Microsoft Windows NT 4.0 SP4
  • Microsoft Windows NT 4.0 SP4 alpha
  • Microsoft Windows NT 4.0 SP5
  • Microsoft Windows NT 4.0 SP5 alpha
  • Microsoft Windows NT 4.0 SP6
  • Microsoft Windows NT 4.0 SP6 alpha
  • Microsoft Windows NT 4.0 SP6a
  • Microsoft Windows NT 4.0 SP6a alpha
  • Microsoft Windows NT 4.0 alpha
  • Microsoft Windows NT Enterprise Server 4.0
  • Microsoft Windows NT Enterprise Server 4.0 SP1
  • Microsoft Windows NT Enterprise Server 4.0 SP2
  • Microsoft Windows NT Enterprise Server 4.0 SP3
  • Microsoft Windows NT Enterprise Server 4.0 SP4
  • Microsoft Windows NT Enterprise Server 4.0 SP5
  • Microsoft Windows NT Enterprise Server 4.0 SP6
  • Microsoft Windows NT Enterprise Server 4.0 SP6a
  • Microsoft Windows NT Server 4.0
  • Microsoft Windows NT Server 4.0 SP1
  • Microsoft Windows NT Server 4.0 SP2
  • Microsoft Windows NT Server 4.0 SP3
  • Microsoft Windows NT Server 4.0 SP4
  • Microsoft Windows NT Server 4.0 SP5
  • Microsoft Windows NT Server 4.0 SP6
  • Microsoft Windows NT Server 4.0 SP6a
  • Microsoft Windows NT Terminal Server 4.0
  • Microsoft Windows NT Terminal Server 4.0 SP1
  • Microsoft Windows NT Terminal Server 4.0 SP2
  • Microsoft Windows NT Terminal Server 4.0 SP3
  • Microsoft Windows NT Terminal Server 4.0 SP4
  • Microsoft Windows NT Terminal Server 4.0 SP5
  • Microsoft Windows NT Terminal Server 4.0 SP6
  • Microsoft Windows NT Terminal Server 4.0 alpha
  • Microsoft Windows NT Workstation 4.0
  • Microsoft Windows NT Workstation 4.0 SP1
  • Microsoft Windows NT Workstation 4.0 SP2
  • Microsoft Windows NT Workstation 4.0 SP3
  • Microsoft Windows NT Workstation 4.0 SP4
  • Microsoft Windows NT Workstation 4.0 SP5
  • Microsoft Windows NT Workstation 4.0 SP6
  • Microsoft Windows NT Workstation 4.0 SP6a
  • Microsoft Windows Server 2003 Datacenter Edition
  • Microsoft Windows Server 2003 Datacenter Edition Itanium
  • Microsoft Windows Server 2003 Enterprise Edition
  • Microsoft Windows Server 2003 Enterprise Edition Itanium
  • Microsoft Windows Server 2003 Standard Edition
  • Microsoft Windows XP Home
  • Microsoft Windows XP Home SP1
  • Microsoft Windows XP Media Center Edition
  • Microsoft Windows XP Professional
  • Microsoft Windows XP Professional SP1

Recommendations

Block external access at the network boundary, unless external parties require service.

Hosts that can send malicious traffic to various ports that listen for RPC traffic can exploit this issue. External access to affected ports should be filtered at network perimeters. Permit access for trusted or internal hosts and networks only.

Implement multiple redundant layers of security.

Multiple layers of network access control and intrusion detection should be deployed to limit exposure to potentially vulnerable systems and monitor network traffic for malicious or anomalous activity.
Avaya has released an advisory to announce that Avaya System Products shipping on Microsoft platforms are also affected by this vulnerability. Avaya advise that customers follow the Microsoft recommendations for the resolution of this issue. The aforementioned advisory can be viewed at the following location: http://support.avaya.com/japple/css/japple?temp.groupID=&temp.selectedFamily=128451&temp.selectedProduct=154235&temp.selectedBucket=126655&temp.feedbackState=askForFeedback&temp.documentID=161384&PAGE=avaya.css.CSSLvl1Detail&executeTransaction=avaya.css.UsageUpdate() Due to the possibility of the existence of working exploit being distributed in the wild, users are advised to apply all available workarounds until the vendor can acknowledge and patch the issue. Microsoft has released a security bulletin MS04-012 with fixes to address this and other issues.

Credits

Discovery credited to ZARAZA. Additional technical details were provided by ISS X-Force. This issue was also independently discovered by Riley Hassell of eEye Digital Security.
Copyright © Symantec Corporation.
Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Security Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from secure@symantec.com.

Disclaimer
The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.
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