{"id":"CVE-2018-20997","aliases":["EUVD-2021-1934","GHSA-xjxc-vfw2-cg96","RUSTSEC-2018-0010","UBUNTU-CVE-2018-20997"],"status":"published","title":"Use after free in openssl","description":"An issue was discovered in the openssl crate before 0.10.9 for Rust. A use-after-free occurs in CMS Signing.","severity":{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01744,"percentile":0.77935,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-416"],"published":"2018-06-01T12:00:00Z","modified":"2026-10-24T10:30:36Z","fixes":[{"ecosystem":"crates.io","package":"openssl","fixed_in":["0.10.9"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"crates.io","package":"openssl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.10.8"},{"fixed":"0.10.9"}]}]},{"source":"osv","ecosystem":"crates.io","package":"openssl","ranges":[{"type":"SEMVER","events":[{"introduced":"0.10.8"},{"fixed":"0.10.9"}]}]},{"source":"osv","ecosystem":"crates.io","package":"openssl","ranges":[{"type":"SEMVER","events":[{"introduced":"0.10.8"},{"fixed":"0.10.9"}]}]}],"products":[{"vendor":"rust-openssl_project","product":"rust-openssl"}],"references":[{"url":"https://rustsec.org/advisories/RUSTSEC-2018-0010.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-20997","tags":["advisory"]},{"url":"https://github.com/sfackler/rust-openssl/pull/942","tags":["web"]},{"url":"https://github.com/advisories/GHSA-xjxc-vfw2-cg96"},{"url":"https://github.com/sfackler/rust-openssl","tags":["package"]},{"url":"https://crates.io/crates/openssl","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2018-20997","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-20997","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2018-20997","description":"An issue was discovered in the openssl crate before 0.10.9 for Rust. A use-after-free occurs in CMS Signing.","status":"published","published":"2019-08-26T17:12:03Z","modified":"2024-08-05T12:19:27.272Z","updated_at":"2026-11-02T14:34:59.872731Z"}],"euvd":[{"id":"EUVD-2021-1934","description":"An issue was discovered in the openssl crate before 0.10.9 for Rust. A use-after-free occurs in CMS Signing.","status":"published","published":"2019-08-26T17:12:03Z","modified":"2024-08-05T12:19:27Z","updated_at":"2026-11-03T02:39:28.311281Z"}],"ghsa":[{"id":"GHSA-xjxc-vfw2-cg96","title":"Use after free in openssl","description":"An issue was discovered in the openssl crate before 0.10.9 for Rust. A use-after-free occurs in CMS Signing.","status":"published","published":"2021-08-25T20:43:45Z","modified":"2023-06-13T19:56:27Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:36:53.654352Z"}],"nvd":[{"id":"CVE-2018-20997","description":"An issue was discovered in the openssl crate before 0.10.9 for Rust. A use-after-free occurs in CMS Signing.","status":"published","published":"2019-08-26T18:15:11.67Z","modified":"2026-06-17T01:53:54.46Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:04:59.278647Z"}],"osv":[{"id":"CVE-2018-20997","description":"An issue was discovered in the openssl crate before 0.10.9 for Rust. A use-after-free occurs in CMS Signing.","status":"published","published":"2019-08-26T18:15:11.67Z","modified":"2026-10-24T10:30:36.961780427Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:09.145458Z"},{"id":"GHSA-xjxc-vfw2-cg96","title":"Use after free in openssl","description":"An issue was discovered in the openssl crate before 0.10.9 for Rust. 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A use-after-free occurs in CMS Signing.","status":"withdrawn","published":"2019-08-26T18:15:00Z","modified":"2025-10-24T04:47:19Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:54:17.91743Z"}]}}