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AUSCERT External Security Bulletin Redistribution
Symantec System Recovery 2011 and Backup Exec System
Recovery 2010 DLL Loading
25 July 2012
AusCERT Security Bulletin Summary
Product: Backup Exec System Recovery 2010
Symantec System Recovery 2011
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Modify Arbitrary Files -- Existing Account
CVE Names: CVE-2012-0305
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Security Advisories Relating to Symantec Products - Symantec System Recovery
2011 and Backup Exec System Recovery 2010 DLL Loading
July 20, 2012
CVSS2 Base Score Impact Exploitability CVSS2 Vector
DLL Loading Remote Code Execution - Medium
5.39 6.44 5.548 AV:A/AC:M/Au:N/C:P/I:P/A:P
Backup Exec System Recovery 2010 and Symantec System Recovery 2011 are
susceptible to potential dll loading due to improper path restrictions in
system file directories. Successful exploitation could result in an attacker
being able to execute arbitrary code with logged-in user permissions.
Product Build Solution(s)
Backup Exec System Recovery 2010 All Upgrade to Backup Exec System
Recovery 2010 SP5
Symantec System Recovery 2011 All Upgrade to Symantec System
Recovery 2011 SP2
Symantec was notified of potential dll loading due to improper path
restrictions in file directories installed with Backup Exec System Recovery
2010 and Symantec System Recovery 2011. The Granular Restore Option directory
and the Recovery Point Browser directory do not properly restrict the loading
of external libraries. An unauthorized local user with access to the system
could potentially insert a specifically-crafted file in one of the susceptible
directory. An attacker with access to the network would then need to entice an
authorized user to load a specifically formatted file from an alternate file
location or network share. Successful exploitation could allow unauthorized
arbitrary code to be executed with logged-on user permissions.
Symantec product engineers verified that the vulnerability exists in the
versions of Backup Exec System Recovery and Symantec System Recovery indicated
above. Additionally, Symantec engineers reviewed related functionality to
further enhance overall product security.
Symantec has determined that one of the affected files indentified as a vector
for the issue reported in the Granular Restore Library, "imapi.dll" is not a
file that Symantec ships and installs with either Backup Exec System Recovery
2010 or Symantec System Recovery 2011. The Symantec products make use of the
imapi.dll version installed with the underlying operating system.
NOTE: Symantec research determined that the presence of an older version of
the imapi.dll could potentially be leveraged in this type of attack on the
Granular Restore Library. Microsoft upgraded the original imapi.dll to imapiv2
with shipping versions of Windows Vista and Windows 7. Microsoft released
Microsoft Hotfix 932716, http://support.microsoft.com/kb/932716, to upgrade
imapi to imapiv2 for Windows XP SP2/SP3 and Windows Server 2003.
Customers should ensure that they upgrade to the Backup Exec System Recovery
2010 SP5 or Symantec System Recovery 2011 SP2 updates indicated above.
Customers should also ensure Microsoft Hotfix 932716 has been successfully
applied on their operating system.
Symantec knows of no exploitation of or adverse customer impact from this
Customers may obtain Backup Exec System Recovery 2010 SP5 or Symantec System
Recovery 2011 SP2 through their normal support/download locations.
As a part of normal best practices, Symantec strongly recommends:
Restrict access to administration or management systems to privileged
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
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
Symantec credits Nenad Stojanovski, for identifying this and working with us
while Symantec resolved the issue.
BID: Security Focus, http://www.securityfocus.com, has assigned a Bugtraq IDs
(BIDs) to the issue for inclusion in the Security Focus vulnerability database.
CVE: The issue is a candidate for inclusion in the CVE list
(http://cve.mitre.org), which standardizes names for security problems.
CVE BID Description
CVE-2012-0305 BID 54594 dll loading command execution
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seriously. As founding members of the Organization for Internet Safety
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Please contact email@example.com if you feel you have discovered a security
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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.
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* Signature names may have been updated to comply with an updated IPS Signature
naming convention. See
for more information.
Last modified on: July 20, 2012
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