RUSTSEC-2023-0053

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Source

https://rustsec.org/advisories/RUSTSEC-2023-0053

Import Source

https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2023-0053.json

JSON Data

https://api.osv.dev/v1/vulns/RUSTSEC-2023-0053

Aliases

GHSA-fh2r-99q2-6mmg

Related

CVE-2018-16875

Published

2023-08-22T12:00:00Z

Modified

2023-11-08T04:19:00.286305Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator

Summary

rustls-webpki: CPU denial of service in certificate path building

Details

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.

We now give each path building operation a budget of 100 signature verifications.

The original webpki crate is also affected.

This was previously reported in the original crate https://github.com/briansmith/webpki/issues/69 and re-reported to us recently by Luke Malinowski.

References

Affected packages

crates.io / rustls-webpki

Package

Name: rustls-webpki; View open source insights on deps.dev
Purl: pkg:cargo/rustls-webpki

Affected ranges

Type: SEMVER
Events: Introduced

0.0.0-0

Fixed

0.100.2

Introduced

0.101.0

Fixed

0.101.4

Ecosystem specific

{
    "affected_functions": null,
    "affects": {
        "os": [],
        "functions": [],
        "arch": []
    }
}

Database specific

{
    "cvss": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
    "informational": null,
    "categories": [
        "denial-of-service"
    ]
}