Catálogo de CVE

CVE-2021-42384

busybox affected and fixed versions

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the handle_special function

Gravedad: Medium · CVSS 6.6CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Published: Nov 9, 2021, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 2.73% · Oct 27, 2026

Projects and upstream resources

[busybox][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / release	Package	Version	Status	Source
Debiantrixie	busybox	`1:1.35.0-1`	FixedDistribution-reported fixed boundary	[CVE-2021-42384]
Debiantrixie	busybox	`1:1.37.0-6`	Fixed	[CVE-2021-42384]
Debiansid	busybox	`1:1.35.0-1`	FixedDistribution-reported fixed boundary	[CVE-2021-42384]
Debiansid	busybox	`1:1.38.0-3`	Fixed	[CVE-2021-42384]
Debianforky	busybox	`1:1.35.0-1`	FixedDistribution-reported fixed boundary	[CVE-2021-42384]
Debianforky	busybox	`1:1.38.0-3`	Fixed	[CVE-2021-42384]
Debianbookworm	busybox	`1:1.35.0-1`	FixedDistribution-reported fixed boundary	[CVE-2021-42384]
Debianbookworm	busybox	`1:1.35.0-4+deb12u1`	Fixed	[CVE-2021-42384]

Showing 8 fix observations. All 46 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
UnknownRelease not reported	busybox	`1:1.35.0-1`	UnknownSource applicability is not established	Provider not reported
Alpine3.11	busybox	`1.31.1-r11`	UnknownSource applicability is not established	[ALPINE-CVE-2021-42384]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.12	busybox	`1.31.1-r21`	UnknownSource applicability is not established	[ALPINE-CVE-2021-42384]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.13	busybox	`1.32.1-r7`	UnknownSource applicability is not established	[ALPINE-CVE-2021-42384]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.14	busybox	`1.33.1-r6`	UnknownSource applicability is not established	[ALPINE-CVE-2021-42384]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.15	busybox	`1.34.0-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-42384]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.16	busybox	`1.34.0-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-42384]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.17	busybox	`1.34.0-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-42384]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.18	busybox	`1.34.0-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-42384]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.19	busybox	`1.34.0-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-42384]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.20	busybox	`1.34.0-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-42384]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.21	busybox	`1.34.0-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-42384]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.22	busybox	`1.34.0-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-42384]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.23	busybox	`1.34.0-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-42384]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.24	busybox	`1.34.0-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-42384]Oct 23, 2026, 5:17:56 PM UTC
Debianbookworm	busybox	`1:1.35.0-1`	FixedDistribution-reported fixed boundary	[CVE-2021-42384]
Debianbookworm	busybox	`1:1.35.0-4+deb12u1`	Fixed	[CVE-2021-42384]
Debianforky	busybox	`1:1.35.0-1`	FixedDistribution-reported fixed boundary	[CVE-2021-42384]
Debianforky	busybox	`1:1.38.0-3`	Fixed	[CVE-2021-42384]
Debiansid	busybox	`1:1.35.0-1`	FixedDistribution-reported fixed boundary	[CVE-2021-42384]
Debiansid	busybox	`1:1.38.0-3`	Fixed	[CVE-2021-42384]
Debiantrixie	busybox	`1:1.35.0-1`	FixedDistribution-reported fixed boundary	[CVE-2021-42384]
Debiantrixie	busybox	`1:1.37.0-6`	Fixed	[CVE-2021-42384]
Ubuntu18.04	busybox	`1:1.22.0-19ubuntu2`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntu18.04	busybox	`1:1.27.2-1ubuntu3`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntu18.04	busybox	`1:1.27.2-1ubuntu4`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntu18.04	busybox	`1:1.27.2-2ubuntu2`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntu18.04	busybox	`1:1.27.2-2ubuntu3`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntu18.04	busybox	`1:1.27.2-2ubuntu3.1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntu18.04	busybox	`1:1.27.2-2ubuntu3.2`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntu18.04	busybox	`1:1.27.2-2ubuntu3.3`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntu18.04	busybox	`1:1.27.2-2ubuntu3.4`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntu20.04	busybox	`1:1.30.1-4ubuntu4`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntu20.04	busybox	`1:1.30.1-4ubuntu5`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntu20.04	busybox	`1:1.30.1-4ubuntu6`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntu20.04	busybox	`1:1.30.1-4ubuntu6.1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntu20.04	busybox	`1:1.30.1-4ubuntu6.2`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntu20.04	busybox	`1:1.30.1-4ubuntu6.3`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntu20.04	busybox	`1:1.30.1-4ubuntu6.4`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntu22.04	busybox	`1:1.30.1-6ubuntu3`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntu22.04	busybox	`1:1.30.1-7ubuntu1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntu22.04	busybox	`1:1.30.1-7ubuntu2`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntupro	busybox	`1:1.22.0-15ubuntu1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntupro	busybox	`1:1.22.0-15ubuntu1.4`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntupro	busybox	`1:1.22.0-15ubuntu1.4+esm1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC
Ubuntupro	busybox	`1:1.22.0-15ubuntu1.4+esm2`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-42384]Feb 4, 2026, 4:01:28 AM UTC

Original provider fields

{
  "package_releases": [
    {
      "name": "busybox",
      "status": "fixed",
      "release": "sid",
      "version": "1:1.38.0-3"
    },
    {
      "name": "busybox",
      "status": "fixed",
      "release": "forky",
      "version": "1:1.38.0-3"
    },
    {
      "name": "busybox",
      "status": "fixed",
      "release": "trixie",
      "version": "1:1.37.0-6"
    },
    {
      "name": "busybox",
      "status": "fixed",
      "release": "bookworm",
      "version": "1:1.35.0-4+deb12u1"
    }
  ],
  "fixed_versions": [
    {
      "bug": 999567,
      "name": "busybox",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "1:1.35.0-1"
    },
    {
      "bug": 999567,
      "name": "busybox",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "1:1.35.0-1"
    },
    {
      "bug": 999567,
      "name": "busybox",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "1:1.35.0-1"
    },
    {
      "bug": 999567,
      "name": "busybox",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "1:1.35.0-1"
    }
  ],
  "distribution_packages": [
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    },
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          ]
        }
      ],
      "release": "3.11",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2021-42384",
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      "release": "3.12",
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    },
    {
      "name": "busybox",
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      "applicability_unknown": true
    },
    {
      "name": "busybox",
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          ]
        }
      ],
      "release": "3.18",
      "versions": [],
      "ecosystem": "apk",
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      "release": "3.23",
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      "provider_updated_at": "2026-10-23T17:17:56.220435422Z",
      "applicability_unknown": true
    },
    {
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          ]
        }
      ],
      "release": "3.24",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2021-42384",
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      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2021-42384",
      "provider_updated_at": "2026-10-23T17:17:56.220435422Z",
      "applicability_unknown": true
    },
    {
      "name": "busybox",
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      "ranges": [
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            {
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          ]
        }
      ],
      "release": "pro",
      "versions": [
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      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-42384",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-42384",
      "provider_updated_at": "2026-02-04T04:01:28.302395Z",
      "applicability_unknown": true
    },
    {
      "name": "busybox",
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      "ranges": [
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          "type": "ECOSYSTEM",
          "events": [
            {
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            },
            {
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            }
          ]
        }
      ],
      "release": "18.04",
      "versions": [
        "1:1.22.0-19ubuntu2",
        "1:1.27.2-1ubuntu3",
        "1:1.27.2-1ubuntu4",
        "1:1.27.2-2ubuntu2",
        "1:1.27.2-2ubuntu3",
        "1:1.27.2-2ubuntu3.1",
        "1:1.27.2-2ubuntu3.2",
        "1:1.27.2-2ubuntu3.3"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-42384",
      "fixed_version": "1:1.27.2-2ubuntu3.4",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-42384",
      "provider_updated_at": "2026-02-04T04:01:28.302395Z",
      "applicability_unknown": true
    },
    {
      "name": "busybox",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:1.30.1-4ubuntu6.4"
            }
          ]
        }
      ],
      "release": "20.04",
      "versions": [
        "1:1.30.1-4ubuntu4",
        "1:1.30.1-4ubuntu5",
        "1:1.30.1-4ubuntu6",
        "1:1.30.1-4ubuntu6.1",
        "1:1.30.1-4ubuntu6.2",
        "1:1.30.1-4ubuntu6.3"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-42384",
      "fixed_version": "1:1.30.1-4ubuntu6.4",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-42384",
      "provider_updated_at": "2026-02-04T04:01:28.302395Z",
      "applicability_unknown": true
    },
    {
      "name": "busybox",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:1.30.1-7ubuntu2"
            }
          ]
        }
      ],
      "release": "22.04",
      "versions": [
        "1:1.30.1-6ubuntu3",
        "1:1.30.1-7ubuntu1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-42384",
      "fixed_version": "1:1.30.1-7ubuntu2",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-42384",
      "provider_updated_at": "2026-02-04T04:01:28.302395Z",
      "applicability_unknown": true
    }
  ]
}

[Debian bug #999567]

OpenFactory catalog packages

La asociación de paquetes está en curso.

[Debian 12 (Bookworm)]

[busybox]Desconocido
Paquete fuente: [busybox]
Detalles (2)
- 1:1.35.0-4+deb12u1+b1 · amd64 · bookworm
  Corregida · Corregida: 1:1.35.0-1
  dsa · busybox · debian · bookworm; dsa · busybox · debian · 12
- 1:1.35.0-4+deb12u1+b1 · arm64 · bookworm
  Corregida · Corregida: 1:1.35.0-1
  dsa · busybox · debian · bookworm; dsa · busybox · debian · 12
[busybox-static]Desconocido
Paquete fuente: [busybox]
Detalles (2)
- 1:1.35.0-4+deb12u1+b1 · amd64 · bookworm
  Corregida · Corregida: 1:1.35.0-1
  dsa · busybox · debian · bookworm; dsa · busybox · debian · 12
- 1:1.35.0-4+deb12u1+b1 · arm64 · bookworm
  Corregida · Corregida: 1:1.35.0-1
  dsa · busybox · debian · bookworm; dsa · busybox · debian · 12
[busybox-syslogd]Desconocido
Paquete fuente: [busybox]
Detalles (2)
- 1:1.35.0-4+deb12u1 · all · bookworm
  Corregida · Corregida: 1:1.35.0-1
  dsa · busybox · debian · bookworm; dsa · busybox · debian · 12
- 1:1.35.0-4+deb12u1 · all · bookworm
  Corregida · Corregida: 1:1.35.0-1
  dsa · busybox · debian · bookworm; dsa · busybox · debian · 12
[udhcpc]Desconocido
Paquete fuente: [busybox]
Detalles (2)
- 1:1.35.0-4+deb12u1+b1 · amd64 · bookworm
  Corregida · Corregida: 1:1.35.0-1
  dsa · busybox · debian · bookworm; dsa · busybox · debian · 12
- 1:1.35.0-4+deb12u1+b1 · arm64 · bookworm
  Corregida · Corregida: 1:1.35.0-1
  dsa · busybox · debian · bookworm; dsa · busybox · debian · 12
[udhcpd]Desconocido
Paquete fuente: [busybox]
Detalles (2)
- 1:1.35.0-4+deb12u1+b1 · amd64 · bookworm
  Corregida · Corregida: 1:1.35.0-1
  dsa · busybox · debian · bookworm; dsa · busybox · debian · 12
- 1:1.35.0-4+deb12u1+b1 · arm64 · bookworm
  Corregida · Corregida: 1:1.35.0-1
  dsa · busybox · debian · bookworm; dsa · busybox · debian · 12

[Debian 13 (Trixie)]

[busybox]Desconocido
Paquete fuente: [busybox]
Detalles (2)
- 1:1.37.0-6+b8 · amd64 · trixie
  Corregida · Corregida: 1:1.35.0-1
  dsa · busybox · debian · 13
- 1:1.37.0-6+b8 · arm64 · trixie
  Corregida · Corregida: 1:1.35.0-1
  dsa · busybox · debian · 13
[busybox-static]Desconocido
Paquete fuente: [busybox]
Detalles (2)
- 1:1.37.0-6+b8 · amd64 · trixie
  Corregida · Corregida: 1:1.35.0-1
  dsa · busybox · debian · 13
- 1:1.37.0-6+b8 · arm64 · trixie
  Corregida · Corregida: 1:1.35.0-1
  dsa · busybox · debian · 13
[busybox-syslogd]Desconocido
Paquete fuente: [busybox]
Detalles (2)
- 1:1.37.0-6 · all · trixie
  Corregida · Corregida: 1:1.35.0-1
  dsa · busybox · debian · 13
- 1:1.37.0-6 · all · trixie
  Corregida · Corregida: 1:1.35.0-1
  dsa · busybox · debian · 13
[udhcpc]Desconocido
Paquete fuente: [busybox]
Detalles (2)
- 1:1.37.0-6 · all · trixie
  Corregida · Corregida: 1:1.35.0-1
  dsa · busybox · debian · 13
- 1:1.37.0-6 · all · trixie
  Corregida · Corregida: 1:1.35.0-1
  dsa · busybox · debian · 13
[udhcpd]Desconocido
Paquete fuente: [busybox]
Detalles (2)
- 1:1.37.0-6 · all · trixie
  Corregida · Corregida: 1:1.35.0-1
  dsa · busybox · debian · 13
- 1:1.37.0-6 · all · trixie
  Corregida · Corregida: 1:1.35.0-1
  dsa · busybox · debian · 13

Observado: Oct 23, 2026, 6:03:12 PM UTC

Referencias

[CERT-Bund public advisories] · [CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]