Vulnerability-Lookup

GHSA-JMHC-VXG9-H2G4

Vulnerability from github – Published: 2021-12-09 00:01 – Updated: 2025-10-22 00:32

Details

A Stack-based buffer overflow vulnerability in SMA100 Apache httpd server's mod_cgi module environment variables allows a remote unauthenticated attacker to potentially execute code as a 'nobody' user in the appliance. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions.

Severity

9.8 (Critical)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2021-20038"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-121",
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-12-08T10:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "A Stack-based buffer overflow vulnerability in SMA100 Apache httpd server\u0027s mod_cgi module environment variables allows a remote unauthenticated attacker to potentially execute code as a \u0027nobody\u0027 user in the appliance. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions.",
  "id": "GHSA-jmhc-vxg9-h2g4",
  "modified": "2025-10-22T00:32:26Z",
  "published": "2021-12-09T00:01:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-20038"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jbaines-r7/badblood"
    },
    {
      "type": "WEB",
      "url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026"
    },
    {
      "type": "WEB",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20038"
    },
    {
      "type": "WEB",
      "url": "https://www.rapid7.com/blog/post/2022/01/11/cve-2021-20038-42-sonicwall-sma-100-multiple-vulnerabilities-fixed-2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2021-20038 (GCVE-0-2021-20038)

Vulnerability from cvelistv5 – Published: 2021-12-08 09:55 – Updated: 2025-10-21 23:25

Summary

Severity

9.8 (Critical)


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

SSVC

Exploitation: active Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-02-04 14:26 UTC

CWE

CWE-121 - Stack-based Buffer Overflow

Assigner

sonicwall mitre root

References

4 references

URL	Tags
https://psirt.global.sonicwall.com/vuln-detail/SN…	x_refsource_CONFIRM
https://github.com/jbaines-r7/badblood	x_refsource_MISC
https://www.rapid7.com/blog/post/2022/01/11/cve-2…	x_refsource_MISC
https://www.cisa.gov/known-exploited-vulnerabilit…	government-resource

Impacted products

1 product

Vendor	Product	Version
SonicWall	SonicWall SMA100	Affected: 10.2.0.8-37sv and earlier Affected: 10.2.1.1-19sv and earlier Affected: 10.2.1.2-24sv and earlier

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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.

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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GHSA-JMHC-VXG9-H2G4

CVE-2021-20038 (GCVE-0-2021-20038)

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