CryptoLib vulnerable to Stack Buffer Overflow in Crypto_Key_Update due to missing TLV length check

{
  "id": "1b0f5f656ea81931b7febe826adfe1c463e169d300872e2951890aa6532837d3",
  "url": "https://osv.dev/vulnerability/CVE-2025-64096",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CryptoLib vulnerable to Stack Buffer Overflow in Crypto_Key_Update due to missing TLV length check",
    "summary": "CryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures (SDLS-EP) to secure communications between a spacecraft running the core Flight System (cFS) and a ground station. Prior to 1.4.2, there is a missing bounds check in Crypto_Key_update() (crypto_key_mgmt.c) which allows a remote attacker to trigger a stack-based buffer overflow by supplying a TLV packet with a spoofed length field. The function calculates the number of keys from an attacker-controlled field (pdu_len), which may exceed the static array size (kblk[98]), leading to an out-of-bounds write and potential memory corruption. This vulnerability is fixed in 1.4.2.",
    "evidence": "osv:CVE-2025-64096",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-64096",
      "aliases": [
        "CVE-2025-64096",
        "GHSA-w6c3-pxvr-6m6j"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nasa/cryptolib",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "309c1c4a57313044215ca730abfa3fbe9e5feed0"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.4.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "cpe": "cpe:2.3:a:nasa:cryptolib:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.4.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.4.0",
            "v1.3.3",
            "v1.3.2",
            "v1.3.1",
            "v1.3.0",
            "v1.2.3",
            "v1.2.2",
            "v1.2.1",
            "v1.2.0",
            "v1.1.1",
            "v1.1.0",
            "v1.0.3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-64096.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:32.424482820Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/64xxx/CVE-2025-64096.json",
        "https://github.com/nasa/CryptoLib/security/advisories/GHSA-w6c3-pxvr-6m6j",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-64096"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-121"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/64xxx/CVE-2025-64096.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-64096",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 499490,
  "published_at": "2025-10-30T17:09:24.24+00:00"
}