Authentication Bypass Affecting cryptography package, versions [1.9.0,2.3)
Snyk CVSS
Attack Complexity
Low
Confidentiality
High
Threat Intelligence
EPSS
0.18% (55th
percentile)
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Test your applications- Snyk ID SNYK-PYTHON-CRYPTOGRAPHY-42164
- published 19 Jul 2018
- disclosed 17 Jul 2018
- credit Unknown
Introduced: 17 Jul 2018
CVE-2018-10903 Open this link in a new tabHow to fix?
Upgrade cryptography to version 2.3 or higher.
Overview
cryptography is a package which provides cryptographic recipes and primitives to Python developers.
Affected versions of this package are vulnerable to Authentication Bypass. The finalize_with_tag API did not enforce a minimum tag length. If a user did not validate the input length prior to passing it to finalize_with_tag an attacker could craft an invalid payload with a shortened tag (e.g. 1 byte) giving them a 1 in 256 chance of passing the MAC check.