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                     Secunia Research 29/02/2008

 - Symantec Backup Exec Calendar Control Multiple Vulnerabilities -

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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: Moderately Critical
Impact: System Access
        Manipulation of data
Where:  From Remote

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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 
overwrite arbitrary files or compromise a vulnerable system.

1) Two boundary errors within the PVATLCalendar.PVCalendar.1 
(pvcalendar.ocx) ActiveX control when handling strings assigned to 
various properties (e.g. "_DOWText0" to "_DOWText6", "_MonthText0" to 
"_MonthText11") can be exploited to cause stack-based buffer overflows 
by assigning overly-long strings to the affected properties and then 
calling the "Save()" method .

2) The PVATLCalendar.PVCalendar.1 (pvcalendar.ocx) ActiveX control 
includes the insecure "Save()" method, which can be exploited to e.g. 
overwrite and corrupt arbitrary files or save malicious script code to 
an arbitrary location on the target system by assigning strings to 
certain properties (e.g. "_DOWText0" to "_DOWText6", "_MonthText0" to 
"_MonthText11").

Successful exploitation of the vulnerabilities allow execution of
arbitrary code.

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5) Solution 

Apply hotfix.
http://seer.entsupport.symantec.com/docs/300471.htm

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6) Time Table 

03/12/2007 - Vendor notified/replied.
29/02/2008 - Public disclosure.

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7) Credits 

Discovered by JJ Reyes, Secunia Research.

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8) References

SYM08-007:
http://www.symantec.com/avcenter/security/Content/2008.02.28.html

The Common Vulnerabilities and Exposures (CVE) project has assigned
CVE-2007-6016 and CVE-2007-6017 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/2007-101/

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

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