Security advisory

{
  "id": "84469d559f2a94f4979e317bac20bc0bb371c04a0f6696ce57538d18c4ed59c9",
  "url": "https://osv.dev/vulnerability/CVE-2020-15158",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-15158",
    "summary": "In libIEC61850 before version 1.4.3, when a message with COTP message length field with value < 4 is received an integer underflow will happen leading to heap buffer overflow. This can cause an application crash or on some platforms even the execution of remote code. If your application is used in open networks or there are untrusted nodes in the network it is highly recommend to apply the patch. This was patched with commit 033ab5b. Users of version 1.4.x should upgrade to version 1.4.3 when available. As a workaround changes of commit 033ab5b can be applied to older versions.",
    "evidence": "osv:CVE-2020-15158",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2020-15158",
      "aliases": [
        "CVE-2020-15158",
        "GHSA-pq77-fmf7-hjw8"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mz-automation/libiec61850",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "033ab5b6488250c8c3b838f25a7cbc3e099230bb"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "fixed": "033ab5b6488250c8c3b838f25a7cbc3e099230bb"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.4.2.1",
            "v1.4.2",
            "v1.4.1",
            "v1.4.0",
            "v1.2.0",
            "v1.3.0",
            "v1.2.2",
            "v1.2.1",
            "v1.1",
            "v1.0.1",
            "v1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-15158.json",
            "vanir_signatures": [
              {
                "id": "CVE-2020-15158-da1ffc64",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "9747529637114398146814241612898872555",
                    "228877145579337979129107497074593147651",
                    "157299610004521608123355527784644828839"
                  ]
                },
                "source": "https://github.com/mz-automation/libiec61850/commit/033ab5b6488250c8c3b838f25a7cbc3e099230bb",
                "target": {
                  "file": "src/mms/iso_cotp/cotp.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2020-15158-efd3bf5f",
                "digest": {
                  "length": 1593,
                  "function_hash": "246948022025928313530960372354749505204"
                },
                "source": "https://github.com/mz-automation/libiec61850/commit/033ab5b6488250c8c3b838f25a7cbc3e099230bb",
                "target": {
                  "file": "src/mms/iso_cotp/cotp.c",
                  "function": "CotpConnection_readToTpktBuffer"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T13:51:54Z"
          }
        }
      ],
      "modified": "2026-10-20T13:51:54.590315115Z",
      "provider": "osv",
      "references": [
        "https://github.com/mz-automation/libiec61850/issues/250",
        "https://github.com/mz-automation/libiec61850/security/advisories/GHSA-pq77-fmf7-hjw8",
        "https://github.com/mz-automation/libiec61850/commit/033ab5b6488250c8c3b838f25a7cbc3e099230bb"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:mz-automation:libiec61850:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "mz-automation:libiec61850",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "1.4.0"
                  },
                  {
                    "fixed": "1.4.3"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          },
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "61850"
                  },
                  {
                    "fixed": "1.4.3"
                  }
                ],
                "source": "DESCRIPTION"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-15158",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 388294,
  "published_at": "2020-08-26T18:15:10.287+00:00"
}