Brussels / 3 & 4 February 2024

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Fixing a Kerberos vulnerability with the bare necessities


Fixing vulnerabilities on long term support distributions can be a challenging task. Constraints such as protocol compatibility or ABI stability often get in the way of backporting security fixes. When a fix simply is incompatible with an older OS version, designing a new one taking advantage of the limited processes and data available might be required.

I will illustrate this with the case of the Bronze-Bit Kerberos vulnerability, which affected FreeIPA and couldn't be fixed the expected way on CentOS 8 Stream and RHEL 8.

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Photo of Julien Rische Julien Rische

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