Security advisory

{
  "id": "8dd1eb4594b4ed5ed2bb0e41d0028507da7356c2ac97656693292655a7cc60b1",
  "url": "https://osv.dev/vulnerability/CVE-2020-28371",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-28371",
    "summary": "An issue was discovered in ReadyTalk Avian 1.2.0 before 2020-10-27. The FileOutputStream.write() method in FileOutputStream.java has a boundary check to prevent out-of-bounds memory read/write operations. However, an integer overflow leads to bypassing this check and achieving the out-of-bounds access. NOTE: This vulnerability only affects products that are no longer supported by the maintainer",
    "evidence": "osv:CVE-2020-28371",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2020-28371",
      "aliases": [
        "CVE-2020-28371"
      ],
      "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/readytalk/avian",
              "type": "GIT",
              "events": [
                {
                  "introduced": "72c0547f4bdedc1ba8da2882317e3f758deab23f"
                },
                {
                  "last_affected": "72c0547f4bdedc1ba8da2882317e3f758deab23f"
                },
                {
                  "fixed": "0871979b298add320ca63f65060acb7532c8a0dd"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:readytalk:avian:1.2.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.2.0"
                      },
                      {
                        "last_affected": "1.2.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "range": [
                      {
                        "fixed": "0871979b298add320ca63f65060acb7532c8a0dd"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.2.0",
            "v1.2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-28371.json",
            "vanir_signatures": [
              {
                "id": "CVE-2020-28371-6a14a7f6",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "161694260855599367855421958645913010844",
                    "140373232215773158794410512667227169120",
                    "147285217384555310785516609865054958401",
                    "270785023055976051505704826886532062262"
                  ]
                },
                "source": "https://github.com/readytalk/avian/commit/0871979b298add320ca63f65060acb7532c8a0dd",
                "target": {
                  "file": "classpath/java/io/FileOutputStream.java"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2020-28371-8520d70b",
                "digest": {
                  "length": 252,
                  "function_hash": "270870376968626371876760759397673686890"
                },
                "source": "https://github.com/readytalk/avian/commit/0871979b298add320ca63f65060acb7532c8a0dd",
                "target": {
                  "file": "classpath/java/io/FileOutputStream.java",
                  "function": "write"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T13:59:08Z"
          }
        }
      ],
      "modified": "2026-10-20T13:59:08.923424941Z",
      "provider": "osv",
      "references": [
        "https://github.com/ReadyTalk/avian/commit/0871979b298add320ca63f65060acb7532c8a0dd",
        "https://github.com/ReadyTalk/avian/pull/572"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-28371",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 388470,
  "published_at": "2020-11-09T22:15:13.333+00:00"
}