CVE-2021-20038

critical

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.

References

https://thehackernews.com/2025/02/ransomhub-becomes-2024s-top-ransomware.html

https://www.sygnia.co/blog/abyss-locker-ransomware-attack-analysis/

https://www.cisa.gov/news-events/cybersecurity-advisories/aa24-207a

https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-215a

https://www.tenable.com/cyber-exposure/tenable-2022-threat-landscape-report

https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-040a

https://www.cisa.gov/news-events/cybersecurity-advisories/aa22-117a

https://www.tenable.com/blog/cve-2025-23006-sonicwall-secure-mobile-access-sma-1000-zero-day-reportedly-exploited

https://www.tenable.com/blog/aa23-215a-2022s-top-routinely-exploited-vulnerabilities

https://www.tenable.com/blog/south-korean-and-american-agencies-release-joint-advisory-on-north-korean-ransomware

https://www.tenable.com/blog/sonicwall-urges-users-to-patch-several-vulnerabilities-in-secure-mobile-access-products-cve

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026

https://github.com/jbaines-r7/badblood

Details

Source: Mitre, NVD

Published: 2021-12-08

Updated: 2025-03-14

Named Vulnerability: SonicWall SMA 100 series vulnerabilityKnown Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.94311