CVE-2021-20038 Information

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.

CVSS Vector

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

Reference

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

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8