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When this crate is given a pathological certificate chain to validate, it will spend CPU time exponential with the number of candidate certificates at each step of path building.
Both TLS clients and TLS servers that accept client certificate are affected.
This was previously reported in https://github.com/briansmith/webpki/issues/69 and re-reported recently by Luke Malinowski.
webpki 0.22.1 included a partial fix and webpki 0.22.2 added further fixes.
When this crate is given a pathological certificate chain to validate, it will spend CPU time exponential with the number of candidate certificates at each step of path building.
Both TLS clients and TLS servers that accept client certificate are affected.
This was previously reported in https://github.com/briansmith/webpki/issues/69 and re-reported recently by Luke Malinowski.
webpki 0.22.1 included a partial fix and webpki 0.22.2 added further fixes.
This high-severity vulnerability could allow attackers to gain unauthorized access, execute arbitrary code, or compromise data integrity. Prompt remediation is strongly recommended.
Apply security patches to version 0.22.2 immediately
Isolate affected systems from untrusted networks until patching is complete
Implement enhanced monitoring for exploitation attempts and unusual behavior