{"id":"UBUNTU-CVE-2026-12205","details":"Crypt::DSA versions before 1.21 for Perl reused the nonce across signatures, leading to private-key recovery. Crypt::DSA::sign caches the per-signature nonce material in the Key object without ever clearing it. The first sign() on a Key object picks a nonce, and every later sign() on that same object reuses it, producing an identical \"r\". Keys used to sign more than once with an affected version should be considered compromised.","modified":"2026-06-24T11:01:17.193602483Z","published":"2026-06-15T23:16:00Z","upstream":["CVE-2026-12205"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-12205"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-12205"},{"type":"REPORT","url":"https://lists.security.metacpan.org/cve-announce/msg/41004653/"}],"affected":[{"package":{"name":"libcrypt-dsa-perl","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libcrypt-dsa-perl?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.17-3","1.17-4"],"ecosystem_specific":{"binaries":[{"binary_name":"libcrypt-dsa-perl","binary_version":"1.17-4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12205.json"}},{"package":{"name":"libcrypt-dsa-perl","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libcrypt-dsa-perl?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.17-4"],"ecosystem_specific":{"binaries":[{"binary_version":"1.17-4","binary_name":"libcrypt-dsa-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12205.json"}},{"package":{"name":"libcrypt-dsa-perl","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libcrypt-dsa-perl?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.17-4"],"ecosystem_specific":{"binaries":[{"binary_name":"libcrypt-dsa-perl","binary_version":"1.17-4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12205.json"}},{"package":{"name":"libcrypt-dsa-perl","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libcrypt-dsa-perl?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.17-4"],"ecosystem_specific":{"binaries":[{"binary_version":"1.17-4","binary_name":"libcrypt-dsa-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12205.json"}},{"package":{"name":"libcrypt-dsa-perl","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libcrypt-dsa-perl?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.17-5"],"ecosystem_specific":{"binaries":[{"binary_name":"libcrypt-dsa-perl","binary_version":"1.17-5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12205.json"}},{"package":{"name":"libcrypt-dsa-perl","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/libcrypt-dsa-perl?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.19-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libcrypt-dsa-perl","binary_version":"1.19-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12205.json"}},{"package":{"name":"libcrypt-dsa-perl","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libcrypt-dsa-perl?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.19-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libcrypt-dsa-perl","binary_version":"1.19-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12205.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}