{"id":"CVE-2011-4121","aliases":["EUVD-2011-4069","GHSA-mjg4-5rfj-952f"],"status":"published","title":"The OpenSSL extension of Ruby (Git trunk) versions after 2011-09-01 up to 2011-11-03 always...","description":"The OpenSSL extension of Ruby (Git trunk) versions after 2011-09-01 up to 2011-11-03 always generated an exponent value of '1' to be used for private RSA key generation. A remote attacker could use this flaw to bypass or corrupt integrity of services, depending on strong private RSA keys generation mechanism.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/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":0.02529,"percentile":0.85011,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-326"],"published":"2019-11-26T04:35:56Z","modified":"2026-06-16T23:34:27Z","products":[{"vendor":"openssl","product":"openssl extension of ruby (git trunk)"},{"vendor":"ruby-lang","product":"ruby"}],"references":[{"url":"https://security-tracker.debian.org/tracker/CVE-2011-4121","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4121","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory"]},{"url":"https://access.redhat.com/security/cve/cve-2011-4121","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2013/07/01/1","tags":["x_refsource_MISC","x_transferred","Mailing List","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-4121"},{"url":"https://github.com/advisories/GHSA-mjg4-5rfj-952f"}],"sources":{"cve":[{"id":"CVE-2011-4121","description":"The OpenSSL extension of Ruby (Git trunk) versions after 2011-09-01 up to 2011-11-03 always generated an exponent value of '1' to be used for private RSA key generation. A remote attacker could use this flaw to bypass or corrupt integrity of services, depending on strong private RSA keys generation mechanism.","status":"published","published":"2019-11-26T04:35:56Z","modified":"2024-08-07T00:01:50.387Z","updated_at":"2026-11-02T14:35:37.671707Z"}],"euvd":[{"id":"EUVD-2011-4069","description":"The OpenSSL extension of Ruby (Git trunk) versions after 2011-09-01 up to 2011-11-03 always generated an exponent value of '1' to be used for private RSA key generation. A remote attacker could use this flaw to bypass or corrupt integrity of services, depending on strong private RSA keys generation mechanism.","status":"published","published":"2019-11-26T04:35:56Z","modified":"2024-08-07T00:01:50Z","updated_at":"2026-11-03T01:39:49.441333Z"}],"ghsa":[{"id":"GHSA-mjg4-5rfj-952f","title":"The OpenSSL extension of Ruby (Git trunk) versions after 2011-09-01 up to 2011-11-03 always...","description":"The OpenSSL extension of Ruby (Git trunk) versions after 2011-09-01 up to 2011-11-03 always generated an exponent value of '1' to be used for private RSA key generation. A remote attacker could use this flaw to bypass or corrupt integrity of services, depending on strong private RSA keys generation mechanism.","status":"published","published":"2022-04-22T00:24:19Z","modified":"2024-04-03T23:05:50Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-326"],"updated_at":"2026-11-02T14:55:47.283285Z"}],"nvd":[{"id":"CVE-2011-4121","description":"The OpenSSL extension of Ruby (Git trunk) versions after 2011-09-01 up to 2011-11-03 always generated an exponent value of '1' to be used for private RSA key generation. A remote attacker could use this flaw to bypass or corrupt integrity of services, depending on strong private RSA keys generation mechanism.","status":"published","published":"2019-11-26T05:15:13.96Z","modified":"2026-06-16T23:34:27.92Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/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-326"],"updated_at":"2026-11-02T14:02:12.945371Z"}]}}