GHSA-f3q4-ggfp-jv34: Adyen APIs Library for Python timing attack vulnerability
Adyen has utility methods for validating notification HMAC signatures. The is_valid_hmac and is_valid_hmac_notification methods are vulnerable to a timing attack, you should compare the hash of the HMACs instead.
References
- github.com/Adyen/adyen-python-api-library
- github.com/Adyen/adyen-python-api-library/commit/3292133dbc00ffc4cccfb92de672a76eaa587ca5
- github.com/Adyen/adyen-python-api-library/issues/168
- github.com/Adyen/adyen-python-api-library/pull/170
- github.com/advisories/GHSA-f3q4-ggfp-jv34
- github.com/pypa/advisory-database/tree/main/vulns/adyen/PYSEC-2023-1.yaml
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