GitHub Advisoryadvisory · crates.io

GHSA-8qv2-5vq6-g2g7 webpki: CPU denial of service in certificate path building

HIGH Published 2023-08-25 Modified 2023-09-06 Official page ↗
Ecosystem
crates.io
Packages
webpki
Severity
High
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-400
Reviewed
2023-08-25

Affected packages

• crates.io webpki: < 0.22.2 → fixed in 0.22.2

Description

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. `rustls-webpki` is a fork of this crate which contains a fix for this issue and is actively maintained.

Related

Weakness · CWE (1)

  • CWE-400 Uncontrolled Resource Consumption weakness

References