Snort, Sourcefire, and Nortel Threat Protection IDS/IPS DCE/RPC buffer overflow

smb-bo (31275) The risk level is classified as HighHigh Risk

Description:

Snort IDS (Intrusion Detection System), Sourcefire Intrusion Sensor software, and Nortel Threat Protection are vulnerable to a stack-based buffer overflow in the DCE/RPC reassembly process. By sending specially-crafted SMB traffic to a vulnerable system, a remote attacker could overflow a buffer and execute arbitrary code on the system with root or SYSTEM privileges.

*CVSS:

Base Score: 10
  Access Vector: Remote
  Access Complexity: Low
  Authentication: Not Required
  Confidentiality Impact: Complete
  Integrity Impact: Complete
  Availability Impact: Complete
 
Temporal Score: 8.3
  Exploitability: Functional
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Gain Access

Remedy:

For Snort IDS/IPS:
Upgrade to the latest version of Snort (2.6.1.3 or later), available from the Snort Web site. See References.

For Gentoo Linux:
Refer to GLSA 200703-01 for patch, upgrade, or suggested workaround information. See References.

For Nortel Threat Protection:
Refer to Nortel Networks Security Advisory DOCUMENT ID 2007007755 for patch, upgrade, or suggested workaround information. See References.

As a workaround, disable the DCE/RPC preprocessor by removing the DCE/RPC preprocessor directives from snort.conf and restarting Snort. However, be advised that disabling the DCE/RPC preprocessor reduces detection capabilities for attacks in DCE/RPC traffic. After upgrading, customers should re-enable the DCE/RPC preprocessor.

References:

Platforms Affected:

  • Gentoo Linux
  • Nortel Threat Protection System 2050
  • Nortel Threat Protection System 2070
  • Nortel Threat Protection System 2150
  • Nortel Threat Protection System 2170
  • Nortel Threat Protection System SEU
  • Snort Snort 2.6.1
  • Snort Snort 2.6.1.1
  • Snort Snort 2.6.1.2
  • Snort Snort 2.7 Beta1
  • Sourcefire Sourcefire Intrusion Sensors 4.1.x before SEU 64
  • Sourcefire Sourcefire Intrusion Sensors 4.5.x before SEU 64
  • Sourcefire Sourcefire Intrusion Sensors 4.6.x before SEU 64
  • Sourcefire Sourcefire Intrusion Sensors (Crossbeam) 4.1.x before SEU 64
  • Sourcefire Sourcefire Intrusion Sensors (Crossbeam) 4.5.x before SEU 64
  • Sourcefire Sourcefire Intrusion Sensors (Crossbeam) 4.6.x before SEU 64

Reported:

Feb 19, 2007

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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