libcrypt-dsa-perl — security advisory

{
  "id": "78d514010a8b1771c1f8fa2d1bb92719e852583823d1e95ace5e1d7e476e9fb0",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-12205",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2026-12205",
    "summary": "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.",
    "evidence": "osv:DEBIAN-CVE-2026-12205",
    "products": [
      {
        "name": {
          "value": "libcrypt-dsa-perl",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.17-5",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.19-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.20-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.21-1",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "libcrypt-dsa-perl",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.19-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.20-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.21-1",
            "evidence": "/affected/1/versions"
          }
        ]
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "DEBIAN-CVE-2026-12205",
      "aliases": [
        "DEBIAN-CVE-2026-12205"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "libcrypt-dsa-perl",
            "purl": "pkg:deb/debian/libcrypt-dsa-perl?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "versions": [
            "1.17-5",
            "1.19-1",
            "1.20-1",
            "1.21-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-12205.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "libcrypt-dsa-perl",
            "purl": "pkg:deb/debian/libcrypt-dsa-perl?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "versions": [
            "1.19-1",
            "1.20-1",
            "1.21-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-12205.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-26T11:47:24.870756855Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-12205"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2026-12205"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-12205",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 450719,
  "published_at": "2026-06-15T23:16:43.15+00:00"
}