Back to KEVs

CVE-2021-20038

A Stack-based buffer overflow vulnerability in SMA100 Apache httpd server's mod_cgi module environment variables allows a remote unauthenticated...

Basic Information

CVE State
PUBLISHED
Reserved Date
December 17, 2020
Published Date
December 08, 2021
Last Updated
February 04, 2025
Vendor
SonicWall
Product
SonicWall SMA100
Description
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.
Tags
apache cisa malware ransomware nuclei_scanner edge

CVSS Scores

CVSS v3.1

9.8 - CRITICAL

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

CVSS v2.0

7.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

SSVC Information

Exploitation
active
Automatable
Yes
Technical Impact
total

Exploit Status

Exploited in the Wild
Yes (2022-01-28 00:00:00 UTC) Source
Used in Malware
Yes (added 2022-01-28 00:00:00 UTC) Source

References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026 https://github.com/jbaines-r7/badblood https://www.rapid7.com/blog/post/2022/01/11/cve-2021-20038-42-sonicwall-sma-100-multiple-vulnerabilities-fixed-2/

Known Exploited Vulnerability Information

Source Added Date
CISA 2022-01-28 00:00:00 UTC

Scanner Integrations

Scanner URL Date Detected
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-20038.yaml 2025-04-26 00:00:00 UTC

Timeline

  • CVE ID Reserved

  • CVE Published to Public

  • Exploit Used in Malware

  • Added to KEVIntel

  • Detected by Nuclei