Insufficient Verification of Data Authenticity Affecting cryptography package, versions [0.8,41.0.3)
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Test your applications- Snyk ID SNYK-PYTHON-CRYPTOGRAPHY-5813745
- published 20 Jul 2023
- disclosed 7 Jul 2023
- credit Juerg Wullschleger
Introduced: 7 Jul 2023
CVE-2023-2975 Open this link in a new tabHow to fix?
Upgrade cryptography to version 41.0.3 or higher.
Overview
Affected versions of this package are vulnerable to Insufficient Verification of Data Authenticity in the AES-SIV cipher implementation in ciphers/cipher_aes_siv.c, which ignores empty associated data entries, making them unauthenticated.
Applications that use the AES-SIV algorithm and want to authenticate empty data entries as associated data can be misled by removing, adding or reordering such empty entries as these are ignored by the OpenSSL implementation.
NOTE: This issue does not affect non-empty associated data authentication and the maintainers are currently unaware of any applications that use empty associated data entries.