[Full-disclosure] TELUS Security Labs VR - Symantec Alert Management System HNDLRSVC Arbitrary Command Execution

[TELUS Security Labs - Vulnerability Research <noreply@xxxxxxxxx>]

Symantec Alert Management System HNDLRSVC Arbitrary Command Execution

TSL ID: FSC20100727-01

1. Affected Software

     Symantec Antivirus Corporate Edition 10.1.8.8000 and possibly prior
     Symantec System Center 10.1.8.8000 and possibly prior

Reference: http://www.symantec.com/business/antivirus-corporate-edition

2. Vulnerability Summary

An arbitrary program execution vulnerability exists in Symantec Alert 
Management System (AMS) service shipped with multiple Symantec products. The 
vulnerability could be exploited by remote unauthenticated attackers to execute 
arbitrary code with SYSTEM privileges.

3. Vulnerability Analysis

The Alert Management System (AMS) component of Symantec Antivirus Corporate 
Edition installs an alert handler service, HNDLRSVC, that listens for commands 
from the AMS server. This service does not perform proper authentication checks 
before executing such commands. Remote unauthenticated attackers could exploit 
this vulnerability by sending a crafted packet via the MSGSYS.EXE service on 
port 38292/TCP. The Run Program command would allow executing arbitrary 
programs from a remote SMB share with SYSTEM privileges on the vulnerable 
system.


4. Vulnerability Detection

TELUS Security Labs has confirmed the vulnerability in:

     Symantec Antivirus Corporate Edition 10.1.8.8000
     Symantec System Center 10.1.8.8000

5. Workaround

Disable the AMS service, or update to the non-vulnerable version of Symantec 
Antivirus 11.x series which does not include the vulnerable AMS component.

6. Vendor Response

Patches have been made available by the vendor to eliminate this vulnerability:

http://www.symantec.com/business/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=2011&suid=20110126_00

7. Disclosure Timeline

  2009-07-31 Reported to the vendor
  2009-08-03 Vendor response
  2011-01-26 Coordinated public disclosure

8. Credits

Junaid Bohio of Vulnerability Research Team, TELUS Security Labs

9. References

  CVE: CVE-2010-0110

  Vendor: 
http://www.symantec.com/business/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=2011&suid=20110126_00

  http://telussecuritylabs.com/threats/show/FSC20100727-01

10. About TELUS Security Labs

TELUS Security Labs, formerly Assurent Secure Technologies is the leading 
provider of security research. Our research services include:

    * Vulnerability Research
    * Malware Research
    * Signature Development
    * Shellcode Exploit Development
    * Application Protocols
    * Product Security Testing
    * Security Content Development (parsers, reports, alerts)

TELUS Security Labs provides a specialized portfolio of services to assist 
security product vendors with newly discovered commercial product 
vulnerabilities and malware attacks. Many of our services are provided on a 
subscription basis to reduce research costs for our customers. Over 50 of the 
world's leading security product vendors rely on TELUS Security Labs research.

http://telussecuritylabs.com

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