Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2011.0575
Symantec Backup Exec Man-in-The-Middle
30 May 2011
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Symantec Backup Exec for Windows Servers
Symantec Backup Exec 2010
Publisher: Symantec
Operating System: Windows
Impact/Access: Provide Misleading Information -- Existing Account
Unauthorised Access -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2011-0546
Original Bulletin:
http://www.symantec.com/business/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=2011&suid=20110526_00
- --------------------------BEGIN INCLUDED TEXT--------------------
Security Advisories Relating to Symantec Products - Symantec Backup Exec
Man-in-The-Middle
SYM11-006
May 26, 2011
Revision History
None
Severity
Medium
CVSS v2 : 6.5
Impact : 10
Exploitability : 2.5
CVSS v2 Vector : (AV: A/AC: H/Au: S/C: C/I: C/A: C)
Overview
Symantec Backup Exec is vulnerable to man-in-the-middle (MiTM) attack due to
weakness in communication protocol implementation and lack of validation of
identity information exchanged between media server and remote agent.
Affected Products
Product Symantec Backup Exec for Windows Servers
Version 11.0, 12.0, 12.5
Build All
Solution(s) Upgrade to Symantec Backup Exec 2010 R3
Product Symantec Backup Exec 2010
Version 13.0, 13.0 R2
Build All
Solution(s) Upgrade to Symantec Backup Exec 2010 R3
Details
Symantec was notified of a MiTM issue in the manner in which communication
protocols are implemented between Backup Exec media server and remote agent.
The issue is a result of lack of validation of remote agent identity
information exchanged between media server and remote agent. Successful
exploitation may result in privilege escalation enabling an attacker to
execute post authentication NDMP commands. Successful exploitation requires
the attacker to be an authorized user on the network or have unauthorized
presence on an authorized system on the network.
Symantec Response
Symantec product engineers verified that the vulnerability exists in the
versions of Backup Exec indicated above.
Symantec has released Symantec Backup Exec 2010 R3 which establishes trust
between Backup Exec remote agent and Backup Exec media server before
exchanging any sensitive information. Symantec recommends customers upgrade
to this release of Symantec Backup Exec which addresses the concern.
Symantec knows of no exploitation of or adverse customer impact from this
issue.
Update Information
Customers may obtain Symantec Backup Exec 2010 R3 from their normal support/
download locations.
Best Practices
As a part of normal best practices, Symantec strongly recommends:
* Restrict access to administration or management systems to privileged
users.
* Restrict remote access, if required, to trusted/authorized systems
only.
* Run under the principle of least privilege where possible to limit the
impact of exploit by threats.
* Keep all operating systems and applications updated with the latest
vendor patches.
* Follow a multi-layered approach to security. Run both firewall and
anti-malware applications, at a minimum, to provide multiple points of
detection and protection to both inbound and outbound threats.
* Deploy network and host-based intrusion detection systems to monitor
network traffic for signs of anomalous or suspicious activity. This may
aid in detection of attacks or malicious activity related to exploitation
of latent vulnerabilities
Credit
Symantec credits Nibin Varghese of iViZ Security, for identifying this issue
and working with us while Symantec fixed the issue.
Reference
Security Focus, http://www.securityfocus.com, has assigned Bugtraq ID (BID)
47824 to identify this issue for inclusion in the Security Focus
vulnerability database.
CVE: This issue is a candidate for inclusion in the CVE list
(http://cve.mitre.org), which standardizes names for security problems.
CVE-2011-0546 has been assigned to this issue.
Symantec takes the security and proper functionality of our products very
seriously. As founding members of the Organization for Internet Safety
(OISafety), Symantec supports and follows responsible disclosure guidelines.
Please contact secure@symantec.com if you feel you have discovered a security
issue in a Symantec product. A member of the Symantec Product Security team
will contact you regarding your submission to coordinate any required
response. Symantec strongly recommends using encrypted email for reporting
vulnerability information to secure@symantec.com. The Symantec Product
Security PGP key can be found at the location below.
Symantec has developed a Product Vulnerability Response document outlining
the process we follow in addressing suspected vulnerabilities in our
products. This document is available below.
Copyright (c) by Symantec Corp.
Permission to redistribute this alert electronically is granted as long as it
is not edited in any way unless authorized by Symantec Product Security.
Reprinting the whole or part of this alert in any medium other than
electronically requires permission from secure@symantec.com
Disclaimer
The information in the advisory is believed to be accurate at the time of
publishing based on currently available information. Use of the information
constitutes acceptance for use in an AS IS condition. There are no warranties
with regard to this information. Neither the author nor the publisher accepts
any liability for any direct, indirect, or consequential loss or damage
arising from use of, or reliance on, this information.
Symantec, Symantec products, Symantec Product Security, and secure@symantec.com
are registered trademarks of Symantec Corp. and/or affiliated companies in the
United States and other countries. All other registered and unregistered
trademarks represented in this document are the sole property of their
respective companies/owners.
* Signature names may have been updated to comply with an updated IPS Signature
naming convention. See http://www.symantec.com/business/support/index?page=content&id=TECH152794&key=54619&actp=LIST for more information.
Last modified on: May 26, 2011
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
http://www.auscert.org.au/render.html?cid=1980
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
iD8DBQFN4xro/iFOrG6YcBERAosKAKDRrWcguHqK7E80lVqAI6mAUjhPBwCeOjVW
EZmX3YVACldmSl8b1cKum98=
=1e6i
-----END PGP SIGNATURE-----