Vulnerability-Lookup

CVE-2021-42385 (GCVE-0-2021-42385)

Vulnerability from cvelistv5 – Published: 2021-11-15 00:00 – Updated: 2025-11-03 20:34

Summary

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 evaluate function

Severity

7.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-04-23 13:32 UTC

CWE

CWE-416

Assigner

JFROG CNA under the mitre root

CNA scorecard C 75/100 over 62 records in the last 180 days details

References

6 references

URL	Tags
https://jfrog.com/blog/unboxing-busybox-14-new-vu…
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://security.netapp.com/advisory/ntap-2021122…
https://claroty.com/team82/research/unboxing-busy…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

1 product

Vendor	Product	Version	CPE status
busybox	busybox	Affected: unspecified , < 1.34.0 (custom)	guessed

Show details on NVD website

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        "datePublished": "2021-11-15T00:00:00.000Z",
        "dateReserved": "2021-10-14T00:00:00.000Z",
        "dateUpdated": "2025-11-03T20:34:13.955Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

ICSA-23-080-07

Vulnerability from csaf_cisa - Published: 2023-03-14 00:00 - Updated: 2023-03-14 00:00

Summary

Siemens SCALANCE Third-Party

Scope

17 vulnerabilities in this advisory, including CVE-2021-42385.

CVE-2021-42385

6.6 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C

Known affected: 9 products

https://support.industry.siemens.com/cs/ww/en/view/109815650/

Open the full advisory

ICSA-23-166-10

Vulnerability from csaf_cisa - Published: 2023-06-13 00:00 - Updated: 2024-04-09 00:00

Summary

Siemens SIMATIC S7-1500 TM MFP BIOS

Scope

72 vulnerabilities in this advisory, including CVE-2021-42385.

CVE-2021-42385

6.6 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C

Known affected: 1 product

https://support.industry.siemens.com/cs/ww/en/view/109945851/

Open the full advisory

ICSA-23-166-12

Vulnerability from csaf_cisa - Published: 2023-06-13 00:00 - Updated: 2023-06-14 00:00

Summary

Siemens SINAMICS Medium Voltage Products

Scope

23 vulnerabilities in this advisory, including CVE-2021-42385.

CVE-2021-42385

6.6 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C

Known affected: 1 product

Open the full advisory

MSRC_CVE-2021-42385

Vulnerability from csaf_microsoft - Published: 2021-11-02 00:00 - Updated: 2021-12-16 00:00

Summary

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 evaluate function

Scope

1 vulnerability in this advisory, including CVE-2021-42385.

CVE-2021-42385

7.2 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Fixed: 2 products Known affected: 2 products

https://learn.microsoft.com/en-us/azure/azure-linux/tutoria…

Open the full advisory

OESA-2021-1449 (CVE-2021-42382)

Vulnerability from osv_openeuler – Published: 2021-12-03 11:04 – Updated: 2026-08-06 11:04 – Source website

Summary

busybox security update

Details

BusyBox combines tiny versions of many common UNIX utilities into a single small executable. It provides replacements for most of the utilities you usually find in GNU fileutils, shellutils, etc. It provides a fairly complete environment for any small or embedded system.

Security Fix(es):

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 getvar_s function(CVE-2021-42382)

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 hash_init function(CVE-2021-42381)

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 clrvar function(CVE-2021-42380)

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 evaluate function(CVE-2021-42385)

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 getvar_i function(CVE-2021-42378)

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 next_input_file function(CVE-2021-42379)

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 evaluate function(CVE-2021-42383)

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(CVE-2021-42384)

Severity

7.2 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References

URL

Type

	https://www.openeuler.org/en/security/safety-bull…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-42382	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-42381	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-42380	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-42385	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-42378	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-42379	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-42383	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-42384	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "busybox-help-1.31.1-13.oe1.aarch64.rpm",
          "busybox-petitboot-1.31.1-13.oe1.aarch64.rpm",
          "busybox-debuginfo-1.31.1-13.oe1.aarch64.rpm",
          "busybox-1.31.1-13.oe1.aarch64.rpm",
          "busybox-debugsource-1.31.1-13.oe1.aarch64.rpm"
        ],
        "src": [
          "busybox-1.31.1-13.oe1.src.rpm"
        ],
        "x86_64": [
          "busybox-help-1.31.1-13.oe1.x86_64.rpm",
          "busybox-petitboot-1.31.1-13.oe1.x86_64.rpm",
          "busybox-debuginfo-1.31.1-13.oe1.x86_64.rpm",
          "busybox-1.31.1-13.oe1.x86_64.rpm",
          "busybox-debugsource-1.31.1-13.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "busybox",
        "purl": "pkg:rpm/openEuler/busybox\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.31.1-13.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "busybox-help-1.31.1-11.oe1.aarch64.rpm",
          "busybox-debugsource-1.31.1-11.oe1.aarch64.rpm",
          "busybox-1.31.1-11.oe1.aarch64.rpm",
          "busybox-debuginfo-1.31.1-11.oe1.aarch64.rpm",
          "busybox-petitboot-1.31.1-11.oe1.aarch64.rpm"
        ],
        "src": [
          "busybox-1.31.1-11.oe1.src.rpm"
        ],
        "x86_64": [
          "busybox-help-1.31.1-11.oe1.x86_64.rpm",
          "busybox-debugsource-1.31.1-11.oe1.x86_64.rpm",
          "busybox-1.31.1-11.oe1.x86_64.rpm",
          "busybox-debuginfo-1.31.1-11.oe1.x86_64.rpm",
          "busybox-petitboot-1.31.1-11.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP2",
        "name": "busybox",
        "purl": "pkg:rpm/openEuler/busybox\u0026distro=openEuler-20.03-LTS-SP2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.31.1-11.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "BusyBox combines tiny versions of many common UNIX utilities into a single small executable. It provides replacements for most of the utilities you usually find in GNU fileutils, shellutils, etc. It provides a fairly complete environment for any small or embedded system.\r\n\r\n\r\n\r\nSecurity Fix(es):\r\n\r\nA use-after-free in Busybox\u0026apos;s awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the getvar_s function(CVE-2021-42382)\r\n\r\nA use-after-free in Busybox\u0026apos;s awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the hash_init function(CVE-2021-42381)\r\n\r\nA use-after-free in Busybox\u0026apos;s awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the clrvar function(CVE-2021-42380)\r\n\r\nA use-after-free in Busybox\u0026apos;s awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the evaluate function(CVE-2021-42385)\r\n\r\nA use-after-free in Busybox\u0026apos;s awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the getvar_i function(CVE-2021-42378)\r\n\r\nA use-after-free in Busybox\u0026apos;s awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the next_input_file function(CVE-2021-42379)\r\n\r\nA use-after-free in Busybox\u0026apos;s awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the evaluate function(CVE-2021-42383)\r\n\r\nA use-after-free in Busybox\u0026apos;s awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the handle_special function(CVE-2021-42384)",
  "id": "OESA-2021-1449",
  "modified": "2026-08-06T11:04:43Z",
  "published": "2021-12-03T11:04:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1449"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-42382"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-42381"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-42380"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-42385"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-42378"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-42379"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-42383"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-42384"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "busybox security update",
  "upstream": [
    "CVE-2021-42382",
    "CVE-2021-42381",
    "CVE-2021-42380",
    "CVE-2021-42385",
    "CVE-2021-42378",
    "CVE-2021-42379",
    "CVE-2021-42383",
    "CVE-2021-42384"
  ]
}

OPENSUSE-SU-2022:0135-1

Vulnerability from csaf_opensuse - Published: 2022-01-20 09:04 - Updated: 2026-09-20 19:38

Summary

Security update for busybox

Severity

Important

Scope

27 vulnerabilities in this advisory, including CVE-2021-42385.

CVE-2021-42385

6.6 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Recommended: 21 products

Open the full advisory

OPENSUSE-SU-2024:11738-1

Vulnerability from csaf_opensuse - Published: 2024-06-15 00:00 - Updated: 2026-09-20 20:24

Summary

busybox-1.35.0-1.1 on GA media

Severity

Moderate

Scope

17 vulnerabilities in this advisory, including CVE-2021-42385.

CVE-2021-42385

6.6 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Recommended: 16 products

Open the full advisory

SSA-419740

Vulnerability from csaf_siemens - Published: 2023-03-14 00:00 - Updated: 2023-03-14 00:00

Summary

SSA-419740: Multiple Third-Party Component Vulnerabilities in RUGGEDCOM and SCALANCE Products before V7.2

Scope

65 vulnerabilities in this advisory, including CVE-2021-42385.

CVE-2021-42385

6.6 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C

Known affected: 20 products

https://support.industry.siemens.com/cs/document/109817007/

Open the full advisory

SSA-565386

Vulnerability from csaf_siemens - Published: 2023-03-14 00:00 - Updated: 2023-03-14 00:00

Summary

SSA-565386: Third-Party Component Vulnerabilities in SCALANCE W-700 IEEE 802.11ax devices before V2.0

Scope

17 vulnerabilities in this advisory, including CVE-2021-42385.

CVE-2021-42385

6.6 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C

Known affected: 9 products

https://support.industry.siemens.com/cs/ww/en/view/109815650/

Open the full advisory

SSA-831302

Vulnerability from csaf_siemens - Published: 2023-06-13 00:00 - Updated: 2024-04-09 00:00

Summary

SSA-831302: Vulnerabilities in the BIOS of the SIMATIC S7-1500 TM MFP before V1.3.0

Scope

72 vulnerabilities in this advisory, including CVE-2021-42385.

CVE-2021-42385

6.6 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C

Known affected: 1 product

https://support.industry.siemens.com/cs/ww/en/view/109945851/

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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CVE-2021-42385 (GCVE-0-2021-42385)

OESA-2021-1449 (CVE-2021-42382)

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