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GHSA-537h-rv9q-vvph

Python-RSA decryption of ciphertext leads to DoS

Source: GitHub Advisory Database (reviewed) High CVE-2020-13757

Packages

EcosystemPackageAffectedFixed in
PyPI rsa < 4.1 4.1

Details

As written in the advisory (Markdown source, shown as plain text).

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

External links from the advisory. They lead to third-party sites.