Upstream information

CVE-2017-11424 at MITRE

Description

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.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 5
Vector AV:N/AC:L/Au:N/C:N/I:P/A:N
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None
CVSS v3 Scores
  National Vulnerability Database
Base Score 7.5
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact High
Availability Impact None
CVSSv3 Version 3
SUSE Bugzilla entry: 1054106 [RESOLVED / FIXED]

SUSE Security Advisories:

    openSUSE-SU-2017:2820-1

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Linux Enterprise High Performance Computing 12 python-PyJWT Released
SUSE Linux Enterprise Module for Public Cloud 12 python-PyJWT Released
SUSE Linux Enterprise Server 12 SP5 python-PyJWT Released
SUSE Linux Enterprise Server for SAP Applications 12 SP5 python-PyJWT Released
Products past their end of life and not receiving proactive updates anymore.
Magnum Orchestration 7 python-PyJWT Released
SUSE CaaS Platform 3.0 python-PyJWT Affected
SUSE Container as a Service Platform 1.0 python-PyJWT Released
SUSE Container as a Service Platform 2.0 python-PyJWT Released
SUSE Linux Enterprise Server 12 python-PyJWT Released
SUSE Linux Enterprise Server 12 SP3 python-PyJWT Released
SUSE Linux Enterprise Server 12 SP4 python-PyJWT Released
SUSE Linux Enterprise Server for SAP Applications 12 python-PyJWT Released
SUSE Linux Enterprise Server for SAP Applications 12 SP3 python-PyJWT Released
SUSE Linux Enterprise Server for SAP Applications 12 SP4 python-PyJWT Released
SUSE Manager Server 3.2 python-PyJWT Released
SUSE OpenStack Cloud 7 python-PyJWT Released

SUSE Timeline for this CVE

CVE page created: Wed Aug 16 21:12:33 2017
CVE page last modified: Thu Dec 7 13:15:07 2023