Advisory ID: cisco-sa-20110216-csa
For Public Release 2011 February 16 16:00 UTC (GMT)
The Management Center for Cisco Security Agent is affected by a
vulnerability that may allow an unauthenticated attacker to perform remote code
execution on the affected device.
Cisco has released software updates that address this vulnerability.
A workaround is available to mitigate this
This advisory is posted at
Cisco Security Agent software releases 5.1, 5.2, and 6.0 are affected
by this vulnerability.
Note: Only the Management Center for Cisco Security Agent is affected by
this vulnerability. Cisco Security Agent installations on end-point
workstations or servers are not affected by this vulnerability.
No other Cisco products are currently known to be affected by this
Cisco Security Agent provides threat protection for server and desktop
computing systems. Cisco Security Agent can function in a standalone manner or
can be managed by the Management Center for Cisco Security Agent.
The Management Center for Cisco Security Agent is affected
by a vulnerability that could allow an unauthenticated attacker to perform
remote code execution on the affected device. A successful exploit could allow
the attacker to modify agent policies and system configuration and perform
other administrative tasks.
Note: This vulnerability can be exploited only by sending certain packets
to the web management interface, which by default listens on TCP port 443.
This vulnerability is documented in Cisco Bug ID
registered customers only)
and has been assigned
the Common Vulnerabilities and Exposures (CVE) identifier CVE-2011-0364.
Cisco has provided scores for the vulnerability in this advisory based
on the Common Vulnerability Scoring System (CVSS). The CVSS scoring in this
Security Advisory is done in accordance with CVSS version 2.0.
CVSS is a standards-based scoring method that conveys
vulnerability severity and helps determine urgency and priority of response.
Cisco has provided a base and temporal score. Customers can
then compute environmental scores to assist in determining the impact of the
vulnerability in individual networks.
Cisco has provided an FAQ to answer additional questions
regarding CVSS at
Cisco has also provided a CVSS calculator to help compute
the environmental impact for individual networks at
CSCtj51216 - CSAMC webagent security issue
Calculate the environmental score of
CVSS Base Score - 10
CVSS Temporal Score - 8.3
Successful exploitation of the vulnerability could allow an
unauthenticated attacker to perform remote code execution on the affected
device and to perform agent policy modification, system configuration, and
other administrative tasks.
When considering software upgrades, consult
and any subsequent advisories to determine exposure and a complete upgrade
In all cases, customers should exercise caution to be
certain the devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported properly by
the new release. If the information is not clear, contact the Cisco Technical
Assistance Center (TAC) or your contracted maintenance provider for assistance.
The vulnerability is corrected in Cisco Security Agent software
versions 126.96.36.199 and later.
Cisco Security Agent software can be downloaded from the
The following policy can be configured as a workaround to mitigate this
vulnerability. Complete the following steps to deploy this policy for the Cisco
Security Agent running on the Management Center for Cisco Security Agent
Create a New Application Class
Step 1. Specify the name of the
application class as 'CSA MC - all applications but not its
Step 2. Select when created from
one of the following executables in the Add Process to
application class area and specify @(regpath
as the value.
Step 3. Ensure that the Only this
process option is selected.
Step 4. Click Save.
Create a priority deny Application Control Rule
Step 1. Name the APCR as CSAMC
applications invoking non-CSAMC applications for better
Step 2. Enable logging.
Step 3. For Current applications
in any of the following selected classes select the application class
created under "Create a New Application Class." For the But
not option, select <none>.
Step 4. For New applications in
any of the following selected classes select <All
Applications>. For the But not option, select the
new application class created under "Create a New Application Class."
Step 5. Click
Cisco has released software updates that address this vulnerability. Prior to deploying software, customers should consult their
maintenance provider or check the software for feature set compatibility and
known issues specific to their environment.
Customers may only install and expect support for the
feature sets they have purchased. By installing, downloading, accessing or
otherwise using such software upgrades, customers agree to be bound by the
terms of Cisco's software license terms found at
or as otherwise set forth at Cisco.com Downloads at
Do not contact firstname.lastname@example.org or email@example.com
for software upgrades.
Customers with contracts should obtain upgraded software through their
regular update channels. For most customers, this means that upgrades should be
obtained through the Software Center on Cisco's worldwide website at
Customers whose Cisco products are provided or maintained through prior
or existing agreements with third-party support organizations, such as Cisco
Partners, authorized resellers, or service providers should contact that
support organization for guidance and assistance with the appropriate course of
action in regards to this advisory.
The effectiveness of any workaround or fix is dependent on
specific customer situations, such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected products
and releases, customers should consult with their service provider or support
organization to ensure any applied workaround or fix is the most appropriate
for use in the intended network before it is deployed.
Customers who purchase direct from Cisco but do not hold a Cisco
service contract, and customers who purchase through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain software patches and bug fixes by contacting the Cisco Technical Assistance Center (TAC). TAC
contacts are as follows.
+1 800 553 2447 (toll free from within North America)
+1 408 526 7209 (toll call from anywhere in the world)
Customers should have the product serial number available and be prepared to provide the URL of this notice as evidence of entitlement to a software patch or bug fix. Customers without service contracts should request a software patch or bug fix through the TAC.
for additional TAC contact information, including localized telephone numbers,
and instructions and e-mail addresses for use in various languages.
The Cisco PSIRT is not aware of any public announcements or malicious
use of the vulnerability described in this advisory.
This vulnerability was found by Gerry Eisenhaur and reported
to Cisco by ZDI.
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A stand-alone copy or Paraphrase of the text of this document that omits the distribution URL in the following section is an uncontrolled copy, and may lack important information or contain factual errors.
This advisory is posted on Cisco's worldwide website at :
In addition to worldwide web posting, a text version of
this notice is clear-signed with the Cisco PSIRT PGP key and is posted to the
following e-mail and Usenet news recipients.
Future updates of this advisory, if any, will be placed on Cisco's
worldwide website, but may or may not be actively announced on mailing lists or
newsgroups. Users concerned about this problem are encouraged to check the
above URL for any updates.
Initial public release.