CVE-2017-11424

mediumPriorität · verfolgen · 31OT-Risiko · erhöhtEPSS 0.018 · 78. PerzentilEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.80% (78th) EPSS

CVSS 5 · medium

Is it mine?

5 products

Prüfe deine Angriffsfläche

Who says so?

4 sources

cnnvd · enisa_euvd · osv · nvd

EPSS · bewertet 2026-10-27

In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

7.5

010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USAusnutzbarkeit 10 · Auswirkung 2.9

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nprimary · NVD / NIST USAusnutzbarkeit 3.9 · Auswirkung 3.6

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · OSV

v3.06.9mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-327USLLM-abgeleitet

betroffene Produkte (5)

Betroffene Produkte und Versionsbereiche.

n/a n/a≤ n/aenisa_euvdEU
debian debian linux= 8.0nvdUScpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
debian debian linux= 9.0nvdUScpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
pyjwt project pyjwt≤ 1.5.0nvdUScpe:2.3:a:pyjwt_project:pyjwt:*:*:*:*:*:*:*:*
PyPI pyjwt< 1.5.1osvUSpkg:pypi/pyjwt

Advisories (2)

Hersteller- und Ökosystem-Meldungen dazu.

GHSA-r9jw-mwhq-wp62PyJWT vulnerable to key confusion attacks2022-05-13ghsa · osvUS
In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.
PYSEC-2017-242017-08-24vendor · osvUS
In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.

auch bekannt als (6)

Weitere Namen und Kennungen dieser Entität.

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvd enisa_euvd osv nvd NVD CVE.org MITRE

veröffentlicht 2017-08-24geändert 2026-06-17

Referenzen (8)

Externe Belege — Patches, Meldungen, Analysen.

http://www.debian.org/security/2017/dsa-3979 cnnvd
https://github.com/jpadilla/pyjwt/pull/277 cnnvd
https://github.com/jpadilla/pyjwt/pull/277/commitsPatchcnnvd
https://www.debian.org/security/2017/dsa-3979 cnnvd
http://www.debian.org/security/2017/dsa-3979 enisa_euvd
https://github.com/jpadilla/pyjwt/pull/277 enisa_euvd
http://www.debian.org/security/2017/dsa-3979Third Party Advisorynvd
https://github.com/jpadilla/pyjwt/pull/277Issue TrackingPatchThird Party Advisorynvd

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