GHSA-5p8v-58qm-c7fp

Source

https://github.com/advisories/GHSA-5p8v-58qm-c7fp

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/09/GHSA-5p8v-58qm-c7fp/GHSA-5p8v-58qm-c7fp.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-5p8v-58qm-c7fp

Aliases

Related

CVE-2022-39227

Published

2022-09-21T21:33:22Z

Modified

2024-07-10T21:46:12.326522Z

Severity

9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
9.3 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator

Summary

python-jwt vulnerable to token forgery with new claims

Details

Impact

An attacker who obtains a JWT can arbitrarily forge its contents without knowing the secret key. Depending on the application, this may for example enable the attacker to spoof other user's identities, hijack their sessions, or bypass authentication.

Patches

Users should upgrade to version 3.3.4 Fixed by: https://github.com/davedoesdev/python-jwt/commit/88ad9e67c53aa5f7c43ec4aa52ed34b7930068c9

Workarounds

None

References

Found by Tom Tervoort https://github.com/pypa/advisory-database/blob/main/vulns/python-jwt/PYSEC-2022-259.yaml

More information

The vulnerability allows an attacker, who possesses a single valid JWT, to create a new token with forged claims that the verify_jwt function will accept as valid.

The issue is caused by an inconsistency between the JWT parsers used by python-jwt and its dependency jwcrypto. By mixing compact and JSON representations, an attacker can trick jwcrypto of parsing different claims than those over which a signature is validated by jwcrypto.

Testing the fix has been added as an automated unit test to python-jwt.

If you have any questions or comments about this advisory, please open an issue in python-jwt

Database specific

{
    "nvd_published_at": "2022-09-23T07:15:00Z",
    "cwe_ids": [
        "CWE-290"
    ],
    "severity": "CRITICAL",
    "github_reviewed": true,
    "github_reviewed_at": "2022-09-21T21:33:22Z"
}

References

Affected packages

PyPI / python-jwt

Package

Name: python-jwt; View open source insights on deps.dev
Purl: pkg:pypi/python-jwt

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.3.4

Affected versions

0.*

0.1.0

0.2.0

0.2.1

0.3.0

0.3.1

0.3.2

0.3.3

0.3.4

0.3.5

0.3.6

0.3.7

0.3.8

1.*

1.0.0

1.0.1

1.0.2

1.0.3

1.1.0

1.1.1

1.1.2

1.1.3

1.1.5

1.1.6

1.1.7

1.2.0

1.2.1

2.*

2.0.0

2.0.1

2.0.2

3.*

3.0.0

3.1.0

3.2.0

3.2.1

3.2.2

3.2.3

3.2.4

3.2.5

3.2.6

3.3.0

3.3.1

3.3.2

3.3.3