{"id":"CVE-2026-14570","aliases":["DEBIAN-CVE-2026-14570","EUVD-2026-41713","GHSA-v6rc-95xw-8xp5","UBUNTU-CVE-2026-14570"],"status":"published","title":"Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery","description":"Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery.\n\n\"Crypt::DSA::Util::makerandom forces the high bit of every value it returns to obtain an exactly N-bit integer for prime search. The signing nonce and the private key are drawn from makerandom. Because the high bit is always set, the result is not uniform: its top bit is fixed, producing insecure values.\"\n\nAn attacker who collects a modest number of signatures under an affected key, together with the public key, can recover the private key with a lattice attack.\n\nKeys used to sign with an affected version should be considered compromised and new keys should be generated.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-09","score":0.00508,"percentile":0.43703,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-330"],"published":"2026-07-05T01:30:12Z","modified":"2026-10-28T02:30:35Z","affected":[{"source":"osv","ecosystem":"Debian:12","package":"libcrypt-dsa-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.17-5","1.19-1","1.20-1","1.21-1"]},{"source":"osv","ecosystem":"Debian:13","package":"libcrypt-dsa-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.19-1","1.20-1","1.21-1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"libcrypt-dsa-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.17-3","1.17-4"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"libcrypt-dsa-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.17-4"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"libcrypt-dsa-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.17-4"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"libcrypt-dsa-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.17-4"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"libcrypt-dsa-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.17-5"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"libcrypt-dsa-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.19-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"libcrypt-dsa-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.19-1"]}],"products":[{"vendor":"timlegge","product":"crypt::dsa"}],"references":[{"url":"https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.21/source/lib/Crypt/DSA/Util.pm#L56","tags":["web","report"]},{"url":"https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.22/diff/TIMLEGGE/Crypt-DSA-1.21#lib/Crypt/DSA/Util.pm","tags":["web","report"]},{"url":"https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.22/changes","tags":["release-notes","advisory","report"]},{"url":"http://www.openwall.com/lists/oss-security/2026/07/05/1","tags":["web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-14570","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-v6rc-95xw-8xp5"},{"url":"https://cpan.org/modules","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/14xxx/CVE-2026-14570.json","tags":["advisory"]},{"url":"https://github.com/perl-Crypt-OpenPGP/Crypt-DSA","tags":["package"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-14570","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-14570","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-14570","tags":["report"]},{"url":"https://lists.security.metacpan.org/cve-announce/msg/41542402/","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-14570","title":"Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery","description":"Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery.\n\n\"Crypt::DSA::Util::makerandom forces the high bit of every value it returns to obtain an exactly N-bit integer for prime search. The signing nonce and the private key are drawn from makerandom. Because the high bit is always set, the result is not uniform: its top bit is fixed, producing insecure values.\"\n\nAn attacker who collects a modest number of signatures under an affected key, together with the public key, can recover the private key with a lattice attack.\n\nKeys used to sign with an affected version should be considered compromised and new keys should be generated.","status":"published","published":"2026-07-05T01:30:12.849Z","modified":"2026-07-06T13:42:11.715Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"adp"}],"cwes":["CWE-330"],"updated_at":"2026-11-02T13:38:43.260938Z"}],"euvd":[{"id":"EUVD-2026-41713","description":"Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery.\n\n\"Crypt::DSA::Util::makerandom forces the high bit of every value it returns to obtain an exactly N-bit integer for prime search. The signing nonce and the private key are drawn from makerandom. Because the high bit is always set, the result is not uniform: its top bit is fixed, producing insecure values.\"\n\nAn attacker who collects a modest number of signatures under an affected key, together with the public key, can recover the private key with a lattice attack.\n\nKeys used to sign with an affected version should be considered compromised and new keys should be generated.","status":"published","published":"2026-07-05T01:30:12Z","modified":"2026-07-06T13:42:11Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T18:20:13.541613Z"}],"ghsa":[{"id":"GHSA-v6rc-95xw-8xp5","title":"Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased...","description":"Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery.\n\n\"Crypt::DSA::Util::makerandom forces the high bit of every value it returns to obtain an exactly N-bit integer for prime search. The signing nonce and the private key are drawn from makerandom. Because the high bit is always set, the result is not uniform: its top bit is fixed, producing insecure values.\"\n\nAn attacker who collects a modest number of signatures under an affected key, together with the public key, can recover the private key with a lattice attack.\n\nKeys used to sign with an affected version should be considered compromised and new keys should be generated.","status":"published","published":"2026-07-05T03:32:33Z","modified":"2026-07-06T15:30:47Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-330"],"updated_at":"2026-11-02T15:09:17.527527Z"}],"nvd":[{"id":"CVE-2026-14570","description":"Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery.\n\n\"Crypt::DSA::Util::makerandom forces the high bit of every value it returns to obtain an exactly N-bit integer for prime search. The signing nonce and the private key are drawn from makerandom. Because the high bit is always set, the result is not uniform: its top bit is fixed, producing insecure values.\"\n\nAn attacker who collects a modest number of signatures under an affected key, together with the public key, can recover the private key with a lattice attack.\n\nKeys used to sign with an affected version should be considered compromised and new keys should be generated.","status":"published","published":"2026-07-05T02:17:40.19Z","modified":"2026-10-25T15:10:00.147Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-330"],"updated_at":"2026-11-02T14:12:27.541515Z"}],"osv":[{"id":"CVE-2026-14570","title":"Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery","description":"Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery.\n\n\"Crypt::DSA::Util::makerandom forces the high bit of every value it returns to obtain an exactly N-bit integer for prime search. The signing nonce and the private key are drawn from makerandom. Because the high bit is always set, the result is not uniform: its top bit is fixed, producing insecure values.\"\n\nAn attacker who collects a modest number of signatures under an affected key, together with the public key, can recover the private key with a lattice attack.\n\nKeys used to sign with an affected version should be considered compromised and new keys should be generated.","status":"published","published":"2026-07-05T01:30:12.849Z","modified":"2026-10-28T02:30:35.943665116Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-330"],"updated_at":"2026-11-02T15:44:57.354194Z"},{"id":"DEBIAN-CVE-2026-14570","description":"Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery.  \"Crypt::DSA::Util::makerandom forces the high bit of every value it returns to obtain an exactly N-bit integer for prime search. The signing nonce and the private key are drawn from makerandom. Because the high bit is always set, the result is not uniform: its top bit is fixed, producing insecure values.\"  An attacker who collects a modest number of signatures under an affected key, together with the public key, can recover the private key with a lattice attack.  Keys used to sign with an affected version should be considered compromised and new keys should be generated.","status":"published","published":"2026-07-05T02:17:40.19Z","modified":"2026-10-26T11:47:32.301047815Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:45:51.8748Z"},{"id":"UBUNTU-CVE-2026-14570","description":"Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery. \"Crypt::DSA::Util::makerandom forces the high bit of every value it returns to obtain an exactly N-bit integer for prime search. The signing nonce and the private key are drawn from makerandom. Because the high bit is always set, the result is not uniform: its top bit is fixed, producing insecure values.\" An attacker who collects a modest number of signatures under an affected key, together with the public key, can recover the private key with a lattice attack. Keys used to sign with an affected version should be considered compromised and new keys should be generated.","status":"published","published":"2026-07-05T02:17:00Z","modified":"2026-07-09T15:15:46Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T16:56:00.592716Z"}]}}