{
  "schema_version": "1.4.0",
  "id": "GHSA-269w-9hm6-g22q",
  "modified": "2022-05-24T19:05:26Z",
  "published": "2022-05-24T19:05:26Z",
  "aliases": [
    "CVE-2021-34813"
  ],
  "details": "Matrix libolm before 3.2.3 allows a malicious Matrix homeserver to crash a client (while it is attempting to retrieve an Olm encrypted room key backup from the homeserver) because olm_pk_decrypt has a stack-based buffer overflow. Remote code execution might be possible for some nonstandard build configurations.",
  "severity": [],
  "affected": [],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-34813"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.matrix.org/matrix-org/olm/-/commit/ccc0d122ee1b4d5e5ca4ec1432086be17d5f901b"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.matrix.org/matrix-org/olm/-/releases/3.2.3"
    },
    {
      "type": "WEB",
      "url": "https://matrix.org/blog/2021/06/14/adventures-in-fuzzing-libolm"
    }
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "severity": "CRITICAL",
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-06-16T18:15:00Z"
  }
}