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).
github.com/sybrenstuvel/python-rsa
github.com/sybrenstuvel/python-rsa/issues/146
github.com/sybrenstuvel/python-rsa/issues/146#issuecomment-641845667
lists.fedoraproject.org/archives/list/[email protected]/message/2KILTHBHNSDUCYV22ODLOKTICJJ7JQIQ
lists.fedoraproject.org/archives/list/[email protected]/message/ZYB65VNILRBTXL6EITQTH2PZPK7I23MW
nvd.nist.gov/vuln/detail/CVE-2020-13757
usn.ubuntu.com/4478-1