{
  "cveId": "CVE-2021-42384",
  "url": "https://patchblox.com/security/cve/CVE-2021-42384",
  "summary": "CVE-2021-42384 is fixed in 6 products on 1 platform, first by busybox 1:1.27.2-2ubuntu3.4, released November 15, 2021. It is not reported as exploited. Patch Radar priority: High.",
  "title": "busybox: A use-after-free in Busybox\u0027s awk applet leads to denial of service and possibly code execution when processing a cra...",
  "description": "A use-after-free in Busybox\u0027s awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the handle_special function",
  "published": "2021-11-15T13:15:00Z",
  "severity": "high",
  "cvss": 7.2,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.02733,
  "epssPercentile": 0.86198,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "busybox",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1:1.35.0-1",
      "fix": "DEBIAN-CVE-2021-42384",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-42384",
      "released": "2021-11-15T21:15:08Z"
    },
    {
      "platform": "linux",
      "product": "busybox",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1:1.35.0-1",
      "fix": "DEBIAN-CVE-2021-42384",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-42384",
      "released": "2021-11-15T21:15:08Z"
    },
    {
      "platform": "linux",
      "product": "busybox",
      "release": "Debian 14",
      "fixedVersion": "1:1.35.0-1",
      "fix": "DEBIAN-CVE-2021-42384",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-42384",
      "released": "2021-11-15T21:15:08Z"
    },
    {
      "platform": "linux",
      "product": "busybox",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:1.27.2-2ubuntu3.4",
      "fix": "busybox 1:1.27.2-2ubuntu3.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-busybox-1-1.27.2-2ubuntu3.4",
      "released": "2021-11-15T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "busybox",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:1.30.1-4ubuntu6.4",
      "fix": "busybox 1:1.30.1-4ubuntu6.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-busybox-1-1.30.1-4ubuntu6.4",
      "released": "2021-11-15T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "busybox",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:1.30.1-7ubuntu2",
      "fix": "busybox 1:1.30.1-7ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-busybox-1-1.30.1-7ubuntu2",
      "released": "2021-11-15T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "busybox-initramfs",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:1.27.2-2ubuntu3.4",
      "fix": "busybox-initramfs 1:1.27.2-2ubuntu3.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-busybox-initramfs-1-1.27.2-2ubuntu3.4",
      "released": "2021-11-15T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "busybox-initramfs",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:1.30.1-4ubuntu6.4",
      "fix": "busybox-initramfs 1:1.30.1-4ubuntu6.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-busybox-initramfs-1-1.30.1-4ubuntu6.4",
      "released": "2021-11-15T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "busybox-initramfs",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:1.30.1-7ubuntu2",
      "fix": "busybox-initramfs 1:1.30.1-7ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-busybox-initramfs-1-1.30.1-7ubuntu2",
      "released": "2021-11-15T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "busybox-static",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:1.27.2-2ubuntu3.4",
      "fix": "busybox-static 1:1.27.2-2ubuntu3.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-busybox-static-1-1.27.2-2ubuntu3.4",
      "released": "2021-11-15T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "busybox-static",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:1.30.1-4ubuntu6.4",
      "fix": "busybox-static 1:1.30.1-4ubuntu6.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-busybox-static-1-1.30.1-4ubuntu6.4",
      "released": "2021-11-15T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "busybox-static",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:1.30.1-7ubuntu2",
      "fix": "busybox-static 1:1.30.1-7ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-busybox-static-1-1.30.1-7ubuntu2",
      "released": "2021-11-15T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "busybox-syslogd",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:1.27.2-2ubuntu3.4",
      "fix": "busybox-syslogd 1:1.27.2-2ubuntu3.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-busybox-syslogd-1-1.27.2-2ubuntu3.4",
      "released": "2021-11-15T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "busybox-syslogd",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:1.30.1-4ubuntu6.4",
      "fix": "busybox-syslogd 1:1.30.1-4ubuntu6.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-busybox-syslogd-1-1.30.1-4ubuntu6.4",
      "released": "2021-11-15T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "busybox-syslogd",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:1.30.1-7ubuntu2",
      "fix": "busybox-syslogd 1:1.30.1-7ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-busybox-syslogd-1-1.30.1-7ubuntu2",
      "released": "2021-11-15T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "udhcpc",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:1.27.2-2ubuntu3.4",
      "fix": "udhcpc 1:1.27.2-2ubuntu3.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-udhcpc-1-1.27.2-2ubuntu3.4",
      "released": "2021-11-15T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "udhcpc",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:1.30.1-4ubuntu6.4",
      "fix": "udhcpc 1:1.30.1-4ubuntu6.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-udhcpc-1-1.30.1-4ubuntu6.4",
      "released": "2021-11-15T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "udhcpc",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:1.30.1-7ubuntu2",
      "fix": "udhcpc 1:1.30.1-7ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-udhcpc-1-1.30.1-7ubuntu2",
      "released": "2021-11-15T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "udhcpd",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:1.27.2-2ubuntu3.4",
      "fix": "udhcpd 1:1.27.2-2ubuntu3.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-udhcpd-1-1.27.2-2ubuntu3.4",
      "released": "2021-11-15T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "udhcpd",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:1.30.1-4ubuntu6.4",
      "fix": "udhcpd 1:1.30.1-4ubuntu6.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-udhcpd-1-1.30.1-4ubuntu6.4",
      "released": "2021-11-15T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "udhcpd",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:1.30.1-7ubuntu2",
      "fix": "udhcpd 1:1.30.1-7ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-udhcpd-1-1.30.1-7ubuntu2",
      "released": "2021-11-15T13:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}