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Cisco Bug: CSCta04885 - CSS May omit headers when processing client certificates

Last Modified

Sep 23, 2017

Products (1)

  • Cisco CSS 11000 Series Content Services Switches

Known Affected Releases

5.0(0.3.1.1)

Description (partial)

Symptom:
An issue in the validation of HTTP Requests by researcher George D. Gal of Virtual Security Research LLC.

This is documented at the following IntelliShield alert:

 * http://tools.cisco.com/security/center/viewAlert.x?alertId=20808

Conditions:
The CSS will only insert client certificate header information when a HTTP header terminator uses carriage return/line feed (CRLF) as per RFC 2612. Some web servers may however allow various permutations of this end-of-line terminator. If an unrecognized end-of-line terminator is detected client certificate header information insertion may fail.
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