{"id":"RUSTSEC-2023-0071","summary":"Marvin Attack: potential key recovery through timing sidechannels","details":"### Impact\nDue to a non-constant-time implementation, information about the private key is leaked through timing information which is observable over the network. An attacker may be able to use that information to recover the key.\n\n### Patches\nThe `rsa` v0.10 series includes a migration to `crypto-bigint` and constant-time mitigations recommended in `draft-irtf-cfrg-rsa-guidance`. Upgrading to this release should resolve all known constant-time issues.\n\n### References\nThis vulnerability was discovered as part of the \"[Marvin Attack]\", which revealed several implementations of RSA including OpenSSL had not properly mitigated timing sidechannel attacks.\n\n[Marvin Attack]: https://people.redhat.com/~hkario/marvin/","aliases":["CVE-2023-49092","GHSA-4grx-2x9w-596c","GHSA-c38w-74pg-36hr"],"modified":"2026-11-08T23:15:02.609337046Z","published":"2023-11-22T12:00:00Z","database_specific":{"license":"CC0-1.0"},"references":[{"type":"PACKAGE","url":"https://crates.io/crates/rsa"},{"type":"ADVISORY","url":"https://rustsec.org/advisories/RUSTSEC-2023-0071.html"},{"type":"REPORT","url":"https://github.com/RustCrypto/RSA/issues/626"},{"type":"REPORT","url":"https://github.com/RustCrypto/RSA/issues/19#issuecomment-1822995643"},{"type":"WEB","url":"https://people.redhat.com/~hkario/marvin/"},{"type":"WEB","url":"https://github.com/RustCrypto/RSA/pull/394"},{"type":"WEB","url":"https://github.com/RustCrypto/RSA/pull/680"},{"type":"WEB","url":"https://github.com/RustCrypto/RSA/pull/702"}],"affected":[{"package":{"name":"rsa","ecosystem":"crates.io","purl":"pkg:cargo/rsa"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.0.0-0"},{"fixed":"0.10.0"}]}],"ecosystem_specific":{"affects":{"arch":[],"os":[],"functions":[]},"affected_functions":null},"database_specific":{"source":"https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2023-0071.json","cvss":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","informational":null,"categories":["crypto-failure"]}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}