{
  "cveId": "CVE-2024-7531",
  "url": "https://patchblox.com/security/cve/CVE-2024-7531",
  "summary": "CVE-2024-7531 is fixed in 111 products on 2 platforms, first by Firefox Developer Edition (en-US) 129.0, released July 9, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Mozilla Firefox ESR and 4 others: Time-of-check Time-of-use (TOCTOU) Race Condition",
  "description": "Calling \u0060PK11_Encrypt()\u0060 in NSS using CKM_CHACHA20 and the same buffer for input and output can result in plaintext on an Intel Sandy Bridge processor. In Firefox this only affects the QUIC header protection feature when the connection is using the ChaCha20-Poly1305 cipher suite. The most likely outcome is connection failure, but if the connection persists despite the high packet loss it could be possible for a network observer to identify packets as coming from the same source despite a network path change. This vulnerability affects Firefox \u003C 129, Firefox ESR \u003C 115.14, and Firefox ESR \u003C 128.1.",
  "published": "2024-08-06T06:15:00Z",
  "severity": "medium",
  "cvss": 6.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
  "cwe": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition",
  "epss": 0.00437,
  "epssPercentile": 0.3824,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://nvd.nist.gov/vuln/detail/CVE-2024-7531",
  "fixes": [
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      "platform": "windows-app",
      "product": "Firefox Developer Edition (en-US)",
      "fixedVersion": "129.0",
      "fix": "Firefox Developer Edition (en-US) 129.0",
      "url": "https://patchblox.com/security/fix/windows-app/mozilla.firefox.developeredition-129.0",
      "released": "2024-07-09T00:00:00Z"
    },
    {
      "platform": "windows-app",
      "product": "Mozilla Firefox (en-US)",
      "fixedVersion": "129.0",
      "fix": "Mozilla Firefox (en-US) 129.0",
      "url": "https://patchblox.com/security/fix/windows-app/mozilla.firefox-129.0",
      "released": "2024-08-06T00:00:00Z"
    },
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      "product": "Mozilla Firefox ESR (ach)",
      "fixedVersion": "140.3.0",
      "fix": "Mozilla Firefox ESR (ach) 140.3.0",
      "url": "https://patchblox.com/security/fix/windows-app/mozilla.firefox.esr.ach-140.3.0",
      "released": "2025-09-16T00:00:00Z"
    },
    {
      "platform": "windows-app",
      "product": "Mozilla Firefox ESR (af)",
      "fixedVersion": "140.3.0",
      "fix": "Mozilla Firefox ESR (af) 140.3.0",
      "url": "https://patchblox.com/security/fix/windows-app/mozilla.firefox.esr.af-140.3.0",
      "released": "2025-09-16T00:00:00Z"
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      "product": "Mozilla Firefox ESR (an)",
      "fixedVersion": "140.3.0",
      "fix": "Mozilla Firefox ESR (an) 140.3.0",
      "url": "https://patchblox.com/security/fix/windows-app/mozilla.firefox.esr.an-140.3.0",
      "released": "2025-09-16T00:00:00Z"
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      "product": "Mozilla Firefox ESR (ar)",
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      "fix": "Mozilla Firefox ESR (ar) 140.3.0",
      "url": "https://patchblox.com/security/fix/windows-app/mozilla.firefox.esr.ar-140.3.0",
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      "url": "https://patchblox.com/security/fix/windows-app/mozilla.firefox.esr.az-140.3.0",
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}