[Full-disclosure] Assurent VR - CA ARCserve Backup Tape Engine Denial of Service

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CA ARCserve Backup Tape Engine Denial of Service

Assurent ID: FSC20081009-11

1. Affected Software

  CA ARCserve Backup 11.1 Windows
  CA ARCserve Backup 11.5 Windows
  CA ARCserve Backup 12.0 Windows

Reference: http://www.ca.com/us/data-loss-prevention.aspx


2. Vulnerability Summary

A vulnerability has been discovered in the Tape Engine component of CA ARCserve 
Backup. Insufficient input validation when processing remote procedure call 
(RPC) requests is the cause of this vulnerability.


3. Vulnerability Analysis

A remote unauthenticated attacker can exploit this vulnerability by sending a 
crafted message to the target server on TCP port 6502. A successful attack 
could cause a denial of service condition for the Tape Engine and Media Server 
services.


4. Vulnerability Detection

Assurent has confirmed the vulnerability in:

  CA ARCserve Backup 11.1 Windows
  CA ARCserve Backup 11.5 Windows
  CA ARCserve Backup 12.0 Windows

5. Workaround

Apply the vendor patch or block communication from untrusted networks to TCP 
port 6502.


6. Vendor Response

CA has released a bulletin addressing this vulnerability. 

Reference: 
https://support.ca.com/irj/portal/anonymous/phpsupcontent?contentID=188143 


7. Disclosure Timeline

  2008-05-12 Reported to vendor
  2008-05-14 Initial vendor response
  2008-10-09 Coordinated public disclosure


8. Credits

Vulnerability Research Team, Assurent Secure Technologies, a TELUS company


9. References

  CVE: CVE-2008-4398
  Vendor: 188143


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