Advisory ID: cisco-sa-20111005-nac
2012 July 14 11:05 UTC (GMT)
For Public Release 2011 October 5 16:00 UTC (GMT)
Cisco Network Admission Control (NAC) Manager contains a directory
traversal vulnerability that may allow an unauthenticated attacker to obtain
There are no workarounds to mitigate this
Cisco has released free software updates that address this
This advisory is posted at http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20111005-nac
Only Cisco NAC Manager software versions 4.8.X are affected by this
vulnerability. Cisco NAC Manager software versions 4.7.X and earlier are not
affected. The Cisco NAC Server (Appliance) is not affected. The Cisco Identity
Services Engine (ISE) is not affected. No other Cisco products are currently
known to be affected by this vulnerability.
The Cisco NAC (formerly Cisco Clean Access) solution allows network
administrators to authenticate, authorize, evaluate, and remediate wired,
wireless, and remote users and their machines prior to allowing users onto the
network. The solution identifies whether machines are compliant with security
policies and repairs vulnerabilities before permitting access to the network.
You can use the NAC Manager server and its web-based administration console to
manage multiple NAC Appliances in a deployment.
Cisco NAC Manager contains a directory traversal vulnerability. The
management interface uses TCP port 443. An unauthenticated attacker could
exploit this vulnerability to access sensitive information, including password
files and system logs, that could be leveraged to launch subsequent attacks.
This vulnerability is documented in Cisco bug ID
registered customers only)
and has been assigned
Common Vulnerabilities and Exposures (CVE) ID CVE-2011-3305.
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
CSCtq10755 - Directory Traversal in CCA
Calculate the environmental score of
CVSS Base Score - 7.8
CVSS Temporal Score - 6.4
An unauthenticated attacker could exploit this vulnerability to access
sensitive information, including password files and system logs, that could be
leveraged to launch subsequent attacks.
When considering software upgrades, also 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.
This vulnerability has been corrected in Cisco NAC Manager Software
Cisco NAC Manager software can be downloaded from the
Cisco has released free 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 http://www.cisco.com
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
acquire upgrades 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 their product serial number available and be
prepared to give the URL of this notice as evidence of entitlement to a free
upgrade. Free upgrades for non-contract customers must be requested through the
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 reported to Cisco by Nenad
Stojanovski of Macedonian Telekom.
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.
||Updated meta-tags for Affected Products.
Initial public release.