rnp — security advisory

{
  "id": "aa53183ca4828ccccc1e7b2dc3054b05a9f4066fe6204ce29f0ee8c54f4146de",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2025-13470",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2025-13470",
    "summary": "In RNP version 0.18.0 a refactoring regression causes the symmetric session key used for Public-Key Encrypted Session Key (PKESK) packets to be left uninitialized except for zeroing, resulting in it always being an all-zero byte array. Any data encrypted using public-key encryption in this release can be decrypted trivially by supplying an all-zero session key, fully compromising confidentiality. The vulnerability affects only public key encryption (PKESK packets). Passphrase-based encryption (SKESK packets) is not affected. Root cause: Vulnerable session key buffer used in PKESK packet generation. The defect was introduced in commit `7bd9a8dc356aae756b40755be76d36205b6b161a` where initialization logic inside `encrypted_build_skesk()` only randomized the key for the SKESK path and omitted it for the PKESK path.",
    "evidence": "osv:DEBIAN-CVE-2025-13470",
    "products": [
      {
        "name": {
          "value": "rnp",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "0.18.1-1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "0.17.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.18.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.18.0-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.18.0-3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.18.0-4",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "high",
    "structured": {
      "id": "DEBIAN-CVE-2025-13470",
      "aliases": [
        "DEBIAN-CVE-2025-13470"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:H/U:Red"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "0.18.1-1"
                }
              ]
            }
          ],
          "package": {
            "name": "rnp",
            "purl": "pkg:deb/debian/rnp?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "versions": [
            "0.17.1-1",
            "0.18.0-1",
            "0.18.0-2",
            "0.18.0-3",
            "0.18.0-4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-13470.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-09T09:47:35.176165607Z",
      "provider": "osv",
      "upstream": [
        "CVE-2025-13470"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2025-13470"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2025-13470",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 111687,
  "published_at": "2025-11-21T17:15:50.473+00:00"
}