Preview Tool

Cisco Bug: CSCsz04690 - SSL Cert Header behavior may allow spoofing of trusted client

Last Modified

Feb 22, 2017

Products (1)

  • Cisco CSS 11000 Series Content Services Switches

Known Affected Releases

5.0( 8.20

Description (partial)

A reported spoofing vulnerability in the enforcement of HTTP certificate headers by researcher George D. Gal of Virtual Security Research LLC.

This is documented at the following IntelliShield alert:


The CSS does not look for and remove any of the headers that may be inserted as part of the http-header command, specifically "ssl-server X http-header client-cert". If someone were to insert these headers prior to encryption before they arrived at the CSS and such they were there after decryption, someone could impersonate a different client.
Bug details contain sensitive information and therefore require a account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.