Summary

This flaw allows a malicious HTTP server to set "super cookies" in curl that are then passed back to more origins than what is otherwise allowed or possible. This allows a site to set cookies that then would get sent to different and unrelated sites and domains. It could do this by exploiting a mixed case flaw in curl's function that verifies a given cookie domain against the Public Suffix List (PSL). For example a cookie could be set with `domain=co.UK` when the URL used a lower case hostname `curl.co.uk`, even though `co.uk` is listed as a PSL domain.

Products Affected

• Brocade ASCG before 3.1.0

Products Not Affected

• Brocade Fabric OS versions before 10.0.0
  [VEX Justification: Vulnerable_code_cannot_be_controlled_by_adversary]
• Brocade SANnav
  [VEX Justification: Vulnerable_code_cannot_be_controlled_by_adversary]

Solution

• While Brocade Fabric OS is not affected, a security update has been provided in Brocade Fabric OS 10.0.0
• Security update provided in Brocade ASCG 3.1.0

Revision History

Disclaimer

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