low
3.2
Advisory Published
Updated

F5-K000138650

First published: Wed Feb 21 2024(Updated: )

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.

Affected SoftwareAffected VersionHow to fix
F5 BIG-IP Next (LTM)>=20.0.1<=20.0.2
20.1.0
F5 BIG-IP Next Central Manager>=20.0.1<=20.0.2
20.1.0
F5 BIG-IP Next>=1.7.0<=1.9.1
F5 BIG-IP Next>=1.1.0<=1.2.1
F5 BIG-IP and BIG-IQ Centralized Management>=17.1.0<=17.1.1
F5 BIG-IP and BIG-IQ Centralized Management>=16.1.0<=16.1.4
F5 BIG-IP and BIG-IQ Centralized Management>=15.1.0<=15.1.10
F5 BIG-IP and BIG-IQ Centralized Management>=8.0.0<=8.3.0

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Reference Links

Frequently Asked Questions

  • What is the severity of F5-K000138650?

    F5-K000138650 is considered a medium severity vulnerability due to its potential to allow super cookies to be set by malicious servers.

  • How do I fix F5-K000138650?

    To fix F5-K000138650, users should upgrade to the latest version of the affected products, specifically version 20.1.0 or above.

  • What are the affected software versions for F5-K000138650?

    Affected software versions for F5-K000138650 include certain versions of F5 BIG-IP, BIG-IP Next, BIG-IP Next Central Manager, and others based on the specified version ranges.

  • What could happen if F5-K000138650 is exploited?

    If F5-K000138650 is exploited, it could enable a malicious HTTP server to set cookies that are incorrectly shared across multiple unrelated sites, compromising user data.

  • Is there a workaround for F5-K000138650?

    Currently, the recommended mitigation for F5-K000138650 is to apply the necessary software updates to prevent exploitation.

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