FKIE_CVE-2021-20038

Vulnerability from fkie_nvd - Published: 2021-12-08 10:15 - Updated: 2026-06-17 03:33
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
PSIRT@sonicwall.comhttps://github.com/jbaines-r7/badbloodExploit, Third Party Advisory
PSIRT@sonicwall.comhttps://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026Vendor Advisory
PSIRT@sonicwall.comhttps://www.rapid7.com/blog/post/2022/01/11/cve-2021-20038-42-sonicwall-sma-100-multiple-vulnerabilities-fixed-2/Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/jbaines-r7/badbloodExploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.rapid7.com/blog/post/2022/01/11/cve-2021-20038-42-sonicwall-sma-100-multiple-vulnerabilities-fixed-2/Exploit, Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20038US Government Resource
Impacted products
Vendor Product Version
sonicwall sma_200_firmware 10.2.0.8-37sv
sonicwall sma_200_firmware 10.2.1.1-19sv
sonicwall sma_200_firmware 10.2.1.2-24sv
sonicwall sma_200 -
sonicwall sma_210_firmware 10.2.0.8-37sv
sonicwall sma_210_firmware 10.2.1.1-19sv
sonicwall sma_210_firmware 10.2.1.2-24sv
sonicwall sma_210 -
sonicwall sma_410_firmware 10.2.0.8-37sv
sonicwall sma_410_firmware 10.2.1.1-19sv
sonicwall sma_410_firmware 10.2.1.2-24sv
sonicwall sma_410 -
sonicwall sma_400_firmware 10.2.0.8-37sv
sonicwall sma_400_firmware 10.2.1.1-19sv
sonicwall sma_400_firmware 10.2.1.2-24sv
sonicwall sma_400 -
sonicwall sma_500v_firmware 10.2.0.8-37sv
sonicwall sma_500v_firmware 10.2.1.1-19sv
sonicwall sma_500v_firmware 10.2.1.2-24sv
sonicwall sma_500v -
To clipboard 

{
  "affected": [
    {
      "affectedData": [
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          "product": "SonicWall SMA100",
          "vendor": "SonicWall",
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            }
          ]
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    }
  ],
  "cisaActionDue": "2022-02-11",
  "cisaExploitAdd": "2022-01-28",
  "cisaRequiredAction": "Apply updates per vendor instructions.",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de desbordamiento de b\u00fafer en la regi\u00f3n Stack de la memoria en las variables de entorno del m\u00f3dulo mod_cgi del servidor httpd de SMA100 permite a un atacante remoto no autenticado ejecutar potencialmente c\u00f3digo como usuario \"nobody\" en el dispositivo. Esta vulnerabilidad afecta a los dispositivos SMA 200, 210, 400, 410 y 500v con firmware versiones 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv y versiones anteriores"
    }
  ],
  "id": "CVE-2021-20038",
  "lastModified": "2026-06-17T03:33:11.327",
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.



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.