CVE-2022-29217
Key confusion through non-blocklisted public key formats
Description
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.
How to fix CVE-2022-29217
To remediate CVE-2022-29217, upgrade the affected package to a fixed version below.
- —upgrade to 2.4.0-1 or later
- —upgrade to 2.4.0 or later
- —upgrade to 9c528670c455b8d948aff95ed50e22940d1ad3fc or later
Is CVE-2022-29217 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 2.4.0-1
- >= 1.5.0, < 2.4.0
- from 0, < 9c528670c455b8d948aff95ed50e22940d1ad3fc | >= 1.5.0, < 2.4.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |