CVE-2020-26244 – Cryptographic issues in Python oic

https://notcve.org/view.php?id=CVE-2020-26244

Python oic is a Python OpenID Connect implementation. In Python oic before version 1.2.1, there are several related cryptographic issues affecting client implementations that use the library. The issues are: 1) The IdToken signature algorithm was not checked automatically, but only if the expected algorithm was passed in as a kwarg. 2) JWA `none` algorithm was allowed in all flows. 3) oic.consumer.Consumer.parse_authz returns an unverified IdToken. The verification of the token was left to the discretion of the implementator. 4) iat claim was not checked for sanity (i.e. it could be in the future). These issues are patched in version 1.2.1. • https://github.com/OpenIDC/pyoidc/commit/62f8d753fa17c8b1f29f8be639cf0b33afb02498 https://github.com/OpenIDC/pyoidc/releases/tag/1.2.1 https://github.com/OpenIDC/pyoidc/security/advisories/GHSA-4fjv-pmhg-3rfg https://pypi.org/project/oic • CWE-325: Missing Cryptographic Step CWE-347: Improper Verification of Cryptographic Signature •