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                     Secunia Research 28/11/2007

       - Symantec Backup Exec Job Engine Denial of Service -

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Table of Contents

Affected Software....................................................1
Severity.............................................................2
Vendor's Description of Software.....................................3
Description of Vulnerability.........................................4
Solution.............................................................5
Time Table...........................................................6
Credits..............................................................7
References...........................................................8
About Secunia........................................................9
Verification........................................................10

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1) Affected Software 

* Symantec Backup Exec for Windows Servers version 11d (11.0 rev 7170)

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Less Critical
Impact: Denial of Service
Where:  Local network

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3) Vendor's Description of Software 

Symantec Backup Exec 11d for Windows Servers is the gold standard in 
Windows data recovery, providing cost-effective, high-performance, and 
certified disk-to-disk-to-tape backup and recovery?with available 
continuous data protection for Microsoft Exchange, SQL, file servers, 
and workstations. High-performance agents and options provide fast, 
flexible, granular protection and recovery, and scalable management of
 local and remote server backups."
 
Product Link:
http://www.symantec.com/business/products/overview.jsp?pcid=2244&pvid=57_1

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4) Description of Vulnerability

Secunia Research has discovered some vulnerabilities in Symantec 
Backup Exec for Windows Servers, which can be exploited by malicious 
people to cause a DoS (Denial of Service).

1) A NULL-pointer dereference error in the Backup Exec Job Engine 
service (bengine.exe) when handling exceptions can be exploited to 
crash the service by sending a specially crafted packet to default 
port 5633/TCP.

2) Two integer overflow errors within the Backup Exec Job Engine 
service can be exploited to e.g. cause the service to enter an 
infinite loop and exhaust all available memory or consume large 
amounts of CPU resource by sending a specially crafted packet to 
default port 5633/TCP.

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5) Solution 

Apply hotfixes.

Build 11.0.6235:
http://support.veritas.com/docs/294241

Build 11.0.7170:
http://support.veritas.com/docs/294237

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6) Time Table 

02/10/2007 - Vendor notified. 
02/10/2007 - Vendor replied.
28/11/2007 - Public disclosure.

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7) Credits 

Discovered by JJ Reyes, Secunia Research.

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8) References

SYM07-029:
http://securityresponse.symantec.com/avcenter/security/Content/2007.11.27.html

The Common Vulnerabilities and Exposures (CVE) project has assigned
CVE-2007-4346 (NULL pointer dereference error) and CVE-2007-4347
(integer overflows) for the vulnerabilities.

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9) About Secunia

Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:

http://corporate.secunia.com/

Secunia also provides a publicly accessible and comprehensive advisory
database as a service to the security community and private 
individuals, who are interested in or concerned about IT-security.

http://secunia.com/

Secunia believes that it is important to support the community and to
do active vulnerability research in order to aid improving the 
security and reliability of software in general:

http://corporate.secunia.com/secunia_research/33/

Secunia regularly hires new skilled team members. Check the URL below 
to see currently vacant positions:

http://secunia.com/secunia_vacancies/

Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/secunia_security_advisories/ 

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10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2007-74/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

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