{
  "crds_version": "0.1",
  "kind": "base",
  "id": "crds:cve-2024-6387",
  "revision": 1,
  "title": "regreSSHion — Signal Handler Race in the OpenSSH Server",
  "summary": "A regression reintroduced an unsafe signal handler in the OpenSSH server, so an unauthenticated attacker who wins a race runs code as the highest-privileged account.",
  "source_type": "cve",
  "severity": "high",
  "cvss": {
    "score": 8.1,
    "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "version": "3.1"
  },
  "epss": 0.99506,
  "exploitation": {
    "known_exploited": false,
    "exploit_available": true,
    "attack_complexity": "high",
    "prerequisites": "Network access to the server, and a great many attempts"
  },
  "remediation": {
    "patch_available": true
  },
  "mitre_attack": [
    "T1190"
  ],
  "kill_chain": "initial_access",
  "recommended_action": "Upgrade OpenSSH to a fixed release, and reduce the login grace period to narrow the window.",
  "confidence": "medium",
  "provenance": [
    {
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        "published_at"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2024-6387",
      "retrieved_at": "2026-08-07T17:02:45.847Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "epss"
      ],
      "source": "https://api.first.org/data/v1/epss?cve=CVE-2024-6387",
      "retrieved_at": "2026-08-07T17:02:45.847Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
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        "remediation",
        "mitre_attack",
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        "recommended_action",
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        "exploitation.prerequisites"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2024-6387",
      "retrieved_at": "2026-08-07T17:02:45.847Z",
      "confidence": "high",
      "extractor": "claude-code"
    }
  ],
  "references": [
    {
      "type": "cve",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-6387",
      "label": "NVD record"
    },
    {
      "type": "vendor_advisory",
      "url": "http://www.openwall.com/lists/oss-security/2024/07/03/3"
    },
    {
      "type": "vendor_advisory",
      "url": "https://github.com/openela-main/openssh/commit/e1f438970e5a337a17070a637c1b9e19697cad09"
    },
    {
      "type": "vendor_advisory",
      "url": "https://lists.mindrot.org/pipermail/openssh-unix-dev/2024-July/041431.html"
    },
    {
      "type": "vendor_advisory",
      "url": "https://news.ycombinator.com/item?id=40843778"
    }
  ],
  "published_at": "2024-07-01T13:15:06.467Z",
  "issued_at": "2026-08-07T17:02:45.847Z",
  "tags": [
    "openssh",
    "unix",
    "race-condition"
  ]
}