Python-RSA before 4.1 ignores leading '\0' bytes during decryption of ciphertext. This could conceivably have a security-relevant impact, e.g., by helping an attacker to infer that an application uses Python-RSA, or if the length of accepted ciphertext affects application behavior (such as by causing excessive memory allocation). (CVE-2020-13757 __)
Run yum update python-rsa to update your system.
noarch: python2-rsa-3.4.1-1.amzn2.0.1.noarch src: python-rsa-3.4.1-1.amzn2.0.1.src