CVE-2017-11424

Impact:
Moderate
Public Date:
2017-06-22
Bugzilla:
1482529: CVE-2017-11424 python-jwt: Incorrect handling of PEM-encoded public keys

The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2017-11424 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v3 metrics

NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.

CVSS3 Base Score 5.3
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Impact Low
Availability Impact None

Affected Packages State

Platform Package State
Red Hat Gluster Storage 3 python-jwt Will not fix
Red Hat Enterprise Linux 7 python-jwt Not affected

Last Modified

CVE description copyright © 2017, The MITRE Corporation

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