Cisco Security Advisory-
The Cisco Content Services (CSS) switch product, also known as Arrowpoint, has two security vulnerabilities once access to the command line interface (CLI) is granted. The first vulnerability, the switch can be forced into a temporary denial of service by an unprivileged user, this is documented in Cisco Bug ID CSCdt08730. The second issue allows a non-privileged user to view filenames and file contents. This is documented in Cisco Bug ID CSCdt12748.
The full text of this advisory can be viewed at: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20010131-arrowpoint-cli-fs.
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This section provides details on affected products.
Vulnerable Products
The Cisco Content Services Switch is affected by this group of vulnerabilities. The CSS switch is also known as Arrowpoint product, and runs the Cisco WebNS Software.
Cisco CSS 11050, CSS 11150, and CSS 11800 hardware platforms are affected by this group of vulnerabilities.
No other Cisco products are affected by this group of vulnerabilities.
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by these vulnerabilities.
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The Cisco CSS11000 must be configured to permit command line access to users by providing a management address and defining user accounts. Once command line access is gained by non privileged users (defined user accounts without administrative privileges), running a command requiring a filename, and providing a filename that is the maximum length of the input buffer can cause the switch to reboot, and a system check to be started which will prevent normal function of the switch for up to 5 minutes. The show script, clear script, show archive, clear archive, show log, and clear log commands are capable of causing the CSS to restart if the specified file name is the maximum length of the input buffer. Cisco Bug ID CSCdt08730.
If command line access is not restricted, a non privileged user (defined user account without administrative privileges) can gain information on the directory structure by requesting non-existent filenames. Additionally, the non privileged user can gain read access for files if the directory structure of the target files are known to the user. Cisco Bug ID CSCdt12748 describes this file system vulnerability.
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Access control lists can be applied to restrict access to the Cisco CSS device, as well as additional firewall or access lists to restrict connection to the management interface. Access control lists also affect traffic to the Virtual interface of the Cisco CSS device, so must be applied with care. For further details on configuring access lists please refer to the product documentation:
http://www.cisco.com/univercd/cc/td/doc/product/webscale/css/bsccfggd/profiles.htm
http://www.cisco.com/univercd/cc/td/doc/product/webscale/css/advcfggd/sgacleql.htm
Additionally, the use of SSH to prevent snooping of the management traffic to the device is encouraged.
Telnet service can also be disabled, for many customers in a co-location environment this is not a feasible option, but is included in this section for customers that may have the ability to implement this configuration.
CS150(config)# telnet access disabled
Additionally, it is recommended to select strong passwords in accordance with your own security policies, and to adhere to your own security policies on changing passwords frequently, or when staffing changes occur.
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CSCdt08730 is resolved in revision 4.01(12s), and revision 3.10 (71s) of Cisco WebNS software. The file system information disclosure vulnerabilities are resolved in revision 4.01(23s) and revision 4.10(13s).
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The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities described in this advisory. These vulnerabilities were discovered by a Security Consulting firm during a customer security audit.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Revision 1.2
2001-April-13
The Software Versions and Fixes section was changed from : "CSCdt08730 is resolved in revision 4.01(12s), and revision 3.10 (71s) of Cisco WebNS software. The file system information disclosure vulnerabilities are scheduled to be fixed, but are currently unresolved. Workarounds are recommended in the interim. This notice will be updated when the vulnerabilities are resolved, or monthly until the vulnerabilities are resolved."
to:
"CSCdt08730 is resolved in revision 4.01(12s), and revision 3.10 (71s) of Cisco WebNS software. The file system information disclosure vulnerabilities are resolved in revision 4.01(23s) and revision 4.10(13s)."
The status of this notice was changed from INTERIM to FINAL, and the wording under the Status of This Notice section was changed from: "This is an interim notice. Although Cisco cannot guarantee the accuracy of all statements in this notice, all of the facts have been checked to the best of our ability. Cisco anticipates issuing updated versions of this notice as the software is updated. Cisco will update this notice by 2001-MAR-01."
to:
"This is an final notice. Although Cisco cannot guarantee the accuracy of all statements in this notice, all of the facts have been checked to the best of our ability. Cisco does not anticipate issuing updated versions of this notice unless there is some material change in the facts. Should there be a significant change in the facts, Cisco may update this notice."
Revision 1.1
2001-February-02
The following sentence was changed: "The Cisco Content Services (CSS) switch product, also known as Arrowpoint, has several security vulnerabilities once access to the command line interface (CLI) is granted."
to:
"The Cisco Content Services (CSS) switch product, also known as Arrowpoint, has two security vulnerabilities once access to the command line interface (CLI) is granted."
The word "several" was changed to "two"
Revision 1.0
2001-January-31
Initial public release.
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