CVE-2020-13757: Python-RSA decryption of ciphertext leads to DoS
(updated )
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).
References
- github.com/advisories/GHSA-537h-rv9q-vvph
- github.com/pypa/advisory-database/tree/main/vulns/rsa/PYSEC-2020-99.yaml
- github.com/sybrenstuvel/python-rsa
- github.com/sybrenstuvel/python-rsa/issues/146
- github.com/sybrenstuvel/python-rsa/issues/146
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2KILTHBHNSDUCYV22ODLOKTICJJ7JQIQ
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZYB65VNILRBTXL6EITQTH2PZPK7I23MW
- nvd.nist.gov/vuln/detail/CVE-2020-13757
- usn.ubuntu.com/4478-1
Code Behaviors & Features
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