{"id":"CVE-2020-13757","details":"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).","aliases":["GHSA-537h-rv9q-vvph","PYSEC-2020-99"],"modified":"2026-07-07T08:50:19.456008181Z","published":"2020-06-01T19:15:10.067Z","related":["SUSE-SU-2021:2008-1","SUSE-SU-2021:2237-1","SUSE-SU-2021:2253-1","SUSE-SU-2022:3287-1","openSUSE-SU-2021:0901-1","openSUSE-SU-2021:2008-1","openSUSE-SU-2024:11269-1","openSUSE-SU-2024:14163-1"],"database_specific":{"unresolved_ranges":[{"vendor_product":"canonical:ubuntu_linux","cpes":["cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*"],"extracted_events":[{"introduced":"14.04"},{"last_affected":"14.04"}],"source":"CPE_STRING"},{"extracted_events":[{"introduced":"31"},{"last_affected":"31"},{"introduced":"32"},{"last_affected":"32"}],"source":"CPE_STRING","vendor_product":"fedoraproject:fedora","cpes":["cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*","cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*"]}]},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2KILTHBHNSDUCYV22ODLOKTICJJ7JQIQ/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZYB65VNILRBTXL6EITQTH2PZPK7I23MW/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4478-1/"},{"type":"REPORT","url":"https://github.com/sybrenstuvel/python-rsa/issues/146"},{"type":"REPORT","url":"https://github.com/sybrenstuvel/python-rsa/issues/146#issuecomment-641845667"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/sybrenstuvel/python-rsa","events":[{"introduced":"0"},{"fixed":"c6731b1dda461676b998a18004b23a9879378041"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:python-rsa_project:python-rsa:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"4.1"}]}}],"versions":["version-4.0","version-3.4","version-3.3","version-3.2.3","version-3.2.2","version-3.2.1","version-3.2","version-3.1.4","version-3.1.3","version-3.1.2","version-3.1.1","version-3.1","version-3.0.1","version-3.0","version-2.0","version-1.3.3","version-1.3.2","version-1.3.1","version-1.3","version-1.2","version-1.1"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-13757.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}