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AUSCERT External Security Bulletin Redistribution
ESB-2008.0220 -- [Win]
Multiple vulnerabilities in the Backup Exec 11d and 12.0 for
Windows Servers scheduler
29 February 2008
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AusCERT Security Bulletin Summary
---------------------------------
Product: Symantec Backup Exec for Windows 11d 11.0.6235
Symantec Backup Exec for Windows 11d 11.0.7170
Symantec Backup Exec for Windows 12 12.0.1364
Publisher: Symantec
Operating System: Windows
Impact: Execute Arbitrary Code/Commands
Denial of Service
Overwrite Arbitrary Files
Access: Remote/Unauthenticated
CVE Names: CVE-2007-6017 CVE-2007-6016
Original Bulletin: http://support.veritas.com/docs/300471
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Symantec Security Advisory SYM08-007
28 February, 2008
Symantec's Backup Exec for Windows Server: Multiple Vulnerabilities
in Scheduler
Revision History
None
Severity
Medium
Requirements
Remote Access Yes
Local Access No
Authentication Required Authenticated user involvment required
Exploited publicly available No
Overview
Vulnerabilities were reported in an ActiveX control that Symantec's
Backup Exec for Windows Servers (BEWS) installs with its scheduler.
Exploitation of these issues could possibly lead to unauthorized
information disclosure, system information corruption or potentially
allow arbitrary code execution in the context of the user's browser.
However, successful exploitation requires specific conditions.
Affected Products
Product Version Build Solution
Symantec Backup Exec for Windows 11d 11.0.6235 Hotfix Available
Symantec Backup Exec for Windows 11d 11.0.7170 Hotfix Available
Symantec Backup Exec for Windows 12 12.0.1364 Hotfix Available
NOTE: ONLY the products and versions listed as affected above are
vulnerable to these issues. This issue impacts the Backup Exec media
server only. Remote client agents are NOT affected.
How to obtain the patch:
For 32bit Media Servers:
Backup Exec 11.0.6235:http://support.veritas.com/docs/300630
Backup Exec 11.0.7170:http://support.veritas.com/docs/300627
Backup Exec 12.0.1364:http://support.veritas.com/docs/300632
For 64bit Media Servers:
Backup Exec 11.0.6235:http://support.veritas.com/docs/300631
Backup Exec 11.0.7170:http://support.veritas.com/docs/300628
Backup Exec 12.0.1364:http://support.veritas.com/docs/300633
To which versions of Backup Exec can this hotfix be applied?
This hotfix can only be applied to the following versions of Backup Exec:
Backup Exec 11d for Windows Servers revision 6235 with Service Pack 2
Backup Exec 11d for Windows Servers revision 7170 with Service Pack 2
Backup Exec 12.0 for Windows Servers revision 1364
Details
Symantec was alerted to multiple vulnerabilities consisting of stack
overflows and unsafe method calls that Secunia Research discovered
in an ActiveX control, installed with BEWS as a part of the scheduler
component. Although this control was not intended to be called via
an external web browser, it failed to properly parse or validate
external input. This improper validation could potentially result
in a browser crash or it could possibly permit unauthorized methods
calls allowing access to overwrite or corrupt files. Unauthorized
access to the vulnerable control could also result in possible
buffer overflows with the potential for malicious code execution
in the context of the targeted user's browser.
The impact of this threat is considerably lessened as it would
require authorized user involvement in any attempt to compromise
the targeted system. To exploit successfully, an attacker would
need to be aware of the exact path to the vulnerable control and
be able to effectively entice a user to upload and execute malicious
scripts via HTML email or visit a malicious web site hosting malicious
code.
Symantec Response
Symantec product engineers have developed and released solutions
for this issue through Symantec's LiveUpdate capability and support
channels as indicated.
Symantec recommends all customers apply all updates to protect
against threats of this nature.
Symantec knows of no exploitation of or adverse customer impact
from these issues.
The patches listed above for affected products are also available
from the following location:
Backup Exec 11.0.6235: http://support.veritas.com/docs/300619
Backup Exec 11.0.7170: http://support.veritas.com/docs/297620
Backup Exec 12.0.1364: http://support.veritas.com/docs/300287
Mitigation
Symantec has developed IDS signatures to detect and block attempts
to exploit this issue.
Best Practices
As part of normal best practices, Symantec strongly recommends a
multi-layered approach to security:
* Run under the principle of least privilege where possible.
* Keep all operating systems and applications updated with the
latest vendor patches.
* Users, at a minimum, should run both a personal firewall and
antivirus application with current updates to provide multiple
points of detection and protection to both inbound and outbound
threats.
* Users should be cautious of mysterious attachments and
executables delivered via email and be cautious of browsing
unknown/untrusted websites or opening unknown/untrusted URL
links.
* Do not open unidentified attachments or executables from
unknown sources or that you didn't request or were unaware of.
* Always err on the side of caution. Even if the sender is
known, the source address may be spoofed.
* If in doubt, contact the sender to confirm they sent it and
why before opening the attachment. If still in doubt, delete
the attachment without opening it.
Credit
Symantec would like to thank JJ Reyes with Secunia Research for
reporting these findings and coordinating closely with Symantec as
we resolved the issues.
References
The Common Vulnerabilities and Exposures (CVE) initiative has
assigned:
CVE-2007-6016 to the buffer overflow issue
CVE-2007-6017 to the unsafe methods issue
These issues are candidates for inclusion in the CVE list
(http://cve.mitre.org ), which standardizes names for security
issues.
SecurityFocus (http://www.securityfocus.com/ ) has assigned Bugtraq
ID BID 26904 for the buffer overflows and BID 28008 for the unsafe
methods for inclusion in the SecurityFocus vulnerability database.
Related Documents:
297853: Symantec Backup Exec (tm) 11.0 (11d) for Windows Servers
revision 7170 Hotfix 39 - Security Hotfix - Requires Service Pack 2
http://support.veritas.com/docs/297853
300287: Symantec Backup Exec (tm) 12.0 for Windows Servers revision
1364 Hotfix 300287 - Security Hotfix
http://support.veritas.com/docs/300287
300619: Symantec Backup Exec (tm) 11.0 (11d) for Windows Servers
revision 6235 Hotfix 31 - Security Hotfix - Requires Service Pack 2
http://support.veritas.com/docs/300619
300627: be7170RHF39_32bit_300627.exe Symantec Backup Exec (tm)
11.0 (11d) for Windows Servers revision 7170 (32bit) - Hotfix 39 -
Security Hotfix - Requires Backup Exec 11.0.7170 Service Pack 2
http://support.veritas.com/docs/300627
300628: be7170RHF39_x64bit_300628.exe Symantec Backup Exec (tm)
11.0 (11d) for Windows Servers revision 7170 (64bit) - Hotfix 39 -
Security Hotfix - Requires Backup Exec 11.0.7170 Service Pack 2
http://support.veritas.com/docs/300628
300630: be6235RHF31_32bit_300630.exe Symantec Backup Exec (tm)
11.0 (11d) for Windows Servers revision 6235 (32bit) - Hotfix 31 -
Security Hotfix - Requires Backup Exec 11.0.6235 Service Pack 2
http://support.veritas.com/docs/300630
300631: be6235RHF31_x64bit_300631.exe Symantec Backup Exec (tm)
11.0 (11d) for Windows Servers revision 6235 (64bit) - Hotfix 31 -
Security Hotfix - Requires Backup Exec 11.0.6235 Service Pack 2
http://support.veritas.com/docs/300631
300632: be1364R300287_32bit_300632.exe Symantec Backup Exec (tm)
12.0 for Windows Servers revision 1364 (32bit) - Hotfix 300287 -
Security Hotfix
http://support.veritas.com/docs/300632
300633: be1364R300287_x64bit_300633.exe Symantec Backup Exec (tm)
12.0 for Windows Servers revision 1364 (64bit) - Hotfix 300287 -
Security Hotfix
http://support.veritas.com/docs/300633
Products Applied:
Backup Exec for Windows Servers 11d (11.0), 11d (11.0) 6235, 11d
(11.0) 7170, 11d (11.0) 7170 SP1, 11d (11.0) 7170 SP2, 12.0
Last Updated: February 28 2008 03:27 PM GMT
Expires on: 02-27-2009
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Subjects:
Backup Exec for Windows Servers
Application: Troubleshooting
Publishing Status: Techalert
Languages:
Russian, English (US), French, German, Spanish, Italian, Japanese,
Chinese, Korean
Operating Systems:
Windows 2000
Advanced Server SP4, Advanced Server Windows Powered SP4, Datacenter
Server SP4, Professional SP4, Server SP4
Windows NT Small Business Server
2000
Windows XP
Pro 5.1 64 bit SP2, Pro 5.1 SP2
Windows Server 2003
DataCenter, DataCenter (x64), DataCenter SP1, DataCenter SP1(x64),
DataCenter SP2, Datacenter SP2(x64), Enterprise (x64), Enterprise
SP1(IA64), Enterprise SP1(x64), Enterprise SP2, Enterprise SP2(x64),
Enterprise Server, Enterprise ServerSP1, R2, Standard Server,
Standard Server SP1, Standard Server SP1 (x64), Standard Server
SP2, Standard Server SP2 (x64), Standard Server(x64), Storage Server,
Storage Server SP1, Storage Server SP2, Web Server, Web Server SP1,
Web Server SP2
Windows Small Business Server 2003
Premium Edition, Premium Edition R2, Premium Edition SP1, Standard
Edition, Standard Edition R2, Standard Edition SP1, Standard Edition
SP2
Symantec World Headquarters:
20330 Stevens Creek Blvd. Cupertino, CA 95014
World Wide Web: http://www.symantec.com,
Tech Support Web: http://entsupport.symantec.com,
E-Mail Support: http://seer.entsupport.symantec.com/email_forms,
FTP: ftp://ftp.entsupport.symantec.com or
http://ftp.entsupport.symantec.com
THE INFORMATION PROVIDED IN THE SYMANTEC SOFTWARE KNOWLEDGE BASE
IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. SYMANTEC SOFTWARE
DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
IN NO EVENT SHALL SYMANTEC SOFTWARE OR ITS SUPPLIERS BE LIABLE FOR
ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,
CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES,EVEN IF
SYMANTEC SOFTWARE OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY
OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION
OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING
LIMITATION MAY NOT APPLY.
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