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AUSCERT External Security Bulletin Redistribution
ESB-2013.1064
Security Advisories Relating to Symantec Products - Symantec
Backup Exec Multiple Issues
5 August 2013
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AusCERT Security Bulletin Summary
---------------------------------
Product: Symantec Backup Exec
Publisher: Symantec
Operating System: Windows
Linux variants
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Cross-site Scripting -- Remote with User Interaction
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
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Security Advisories Relating to Symantec Products - Symantec Backup Exec
Multiple Issues
SYM13-009
August 1, 2013
Revisions
None
Severity
CVSS2 Impact Exploitability CVSS2 Vector
Base Score
Linux Agent Utility Heap Overflow - High
7.9 10 5.5 AV:A/AC:M/Au:N/C:C/I:C/A:C
Management Console/beutility XSS - Medium
3.7 4.9 4.1 AV:A/AC:L/Au:M/C:P/I:P/A:N
Backup Data Storage Files Weak Permissions - Medium
4.3 6.4 3.1 AV:L/AC:L/Au:S/C:P/I:P/A:P
NDMP Information Disclosure - Low
2.7 2.9 5.1 AV:A/AC:L/Au:S/C:P/I:N/A:N
Overview
Symantec Backup Exec is susceptible to security issues including a remote heap
overflow in the utility program shipping with the Linux agent. Also potentially
susceptible to cross-site scripting (XSS) issues in the management console,
unauthorized access to backup data due to weak permissions and an information
disclosure in the NDMP protocol. These issues could result in unauthorized OS
version information disclosure, session hijacking/redirection or unauthorized
access to sensitive information, crashing a Linux agent or potential elevation
of privilege on a system hosting a Linux agent.
Product(s) Affected
Product Version Build Solution
Symantec Backup Exec 2012 1798 2012 SP2
Symantec Backup Exec 2010 R3 5204 2010 R3 SP3
Details
Symantec was notified of security issues in Symantec Backup Exec. The utility
program shipping with the Linux agent used to back-up MAC/Unix/Linux clients is
susceptible to a heap overflow that could potentially result in crashing the
agent or possibly allow unauthorized privilege access to the host.
During a normal backup process, backup and restore data files are stored with
weak ACLs allowing r/w access to everyone. This information could be useful to
an authorized but non-privileged user able to access the stored data. The
information could be used to leverage unauthorized access to or elevated
privilege on network systems.
The NMDP protocol shipped with Symantec Backup Exec leaks host versioning
information that could provide reconnaissance information to a malicious
authorized user. The malicious user could potentially leverage this
information for unauthorized access attempts against a network system.
The Symantec Backup Exec management console is susceptible to XSS issues in
various pages used to generate custom reports, create Storage Devices and
jobs. Beutility console is also susceptible to XSS issues when managing Backup
Exec servers. A malicious user with authorized access to the management console
or beutility could insert scripts that could be used to gather information from
other authorized utility users potentially resulting in access to areas of the
network or systems not normally authorized to them.
In a normal Symantec Backup Exec installation, neither agents nor servers
should be accessible outside of the network environment. These restrictions
reduce exposure to these issues from external sources. However, an external
attacker able to successfully leverage network access or entice an authorized
user to download a malicious code package could attempt to exploit some of
these issues.
Symantec Response
Symantec engineers verified these issues and have released updates to address
them. Customers should ensure they are on the latest release of Symantec Backup
Exec 2012 or Symantec Backup Exec 2010 as indicated in the product matrix
above.
Symantec is not aware of exploitation of or adverse customer impact from these
issues.
Update Information
Updates are available through customers' normal support locations.
Best Practices
As part of normal best practices, Symantec strongly recommends:
Restrict access to administration or management systems to privileged
users.
Disable remote access if not required or restrict it to
trusted/authorized systems only.
Where possible, limit exposure of application and web interfaces to
trusted/internal networks only.
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 thanks Perran Hill, Shaun Jones, Edward Torkington, Daniele Costa, and
Andy Davis with NCC Group for discovering, reporting these issues and
coordinating with us as we addressed them.
References
BID: Security Focus, http://www.securityfocus.com, has assigned Bugtraq IDs
(BIDs) to these issues for inclusion in the Security Focus vulnerability
database.
CVE: These issues are candidates for inclusion in the CVE list
(http://cve.mitre.org), which standardizes names for security problems.
CVE BID Description
CVE-2013-4575 BID 61485 Linux Agent Utility Heap Overflow
CVE-2013-4676 BID 61486 Management Console/beutility Console XSS
CVE-2013-4677 BID 61487 Backup Data Storage Files Weak Permissions
CVE-2013-4678 BID 61488 NDMP Information Disclosure
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.
Symantec Vulnerability Response Policy
Symantec Product Vulnerability Management PGP Key
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: August 1, 2013
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