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Cryptographic Issues Affecting oic package, versions [,1.2.1)

0.0
low

Snyk CVSS

    Attack Complexity High

    Threat Intelligence

    EPSS 0.16% (52nd percentile)
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NVD
6.8 medium

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  • Snyk ID SNYK-PYTHON-OIC-1047572
  • published 1 Dec 2020
  • disclosed 1 Dec 2020
  • credit tpazderka
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Introduced: 1 Dec 2020

CVE-2020-26244 Open this link in a new tab
CWE-310 Open this link in a new tab

How to fix?

Upgrade oic to version 1.2.1 or higher.

Overview

Affected versions of this package are vulnerable to Cryptographic Issues due to the following:

  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)