CVE-2022-29217: Key confusion through non-blocklisted public key formats

CVE-2022-29217 · Severity: low · CVSS 3.1 · Published 2022-05-24

PyJWT is a Python implementation of RFC 7519. PyJWT supports multiple different JWT signing algorithms. With JWT, an attacker submitting the JWT token can choose the used signing algorithm. The PyJWT library requires that the application chooses what algorithms are supported. The application can specify `jwt.algorithms.get_default_algorithms()` to get support for all algorithms, or specify a single algorithm. The issue is not that big as `algorithms=jwt.algorithms.get_default_algorithms()` has to be used. Users should upgrade to v2.4.0 to receive a patch for this issue. As a workaround, always be explicit with the algorithms that are accepted and expected when decoding.

Technologies: pyjwt (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2022-29217 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2022-29217 being exploited in the wild.
How severe is CVE-2022-29217?
Low severity, with a CVSS score of 3.1, published 24 May 2022.
Which products and versions are affected?
pyjwt (PyPI) ECOSYSTEM:introduced=1.5.0,fixed=2.4.0, GIT:introduced=0,fixed=9c528670c455b8d948aff95ed50e22940d1ad3fc|ECOSYSTEM:introduced=1.5.0,fixed=2.4.0.
Is there a fix for CVE-2022-29217?
Yes. pyjwt (PyPI): upgrade to 2.4.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2022-29217?
Check whether you run pyjwt (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • pyjwt (PyPI): upgrade to 2.4.0 or later
    pip install "pyjwt>=2.4.0"

Affected products

  • pyjwt (PyPI) ECOSYSTEM:introduced=1.5.0,fixed=2.4.0, GIT:introduced=0,fixed=9c528670c455b8d948aff95ed50e22940d1ad3fc|ECOSYSTEM:introduced=1.5.0,fixed=2.4.0

Identifiers

  • CVE-2022-29217
  • GHSA-ffqj-6fqr-9h24
  • PYSEC-2022-202

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