CVE-2021-20038

9.8CRITICAL

Key Information

Vendor: Sonicwall
Status: Sonicwall Sma100
Vendor: CVE Published:; 8 December 2021

Badges

👾 Exploit Exists🔴 Public PoC🟣 EPSS 96%

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.

CISA Reported

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed CVE-2021-20038 as being exploited and is known by the CISA as enabling ransomware campaigns.

The CISA's recommendation is: Apply updates per vendor instructions.

Affected Version(s)

SonicWall SMA100 = 10.2.0.8-37sv and earlier

SonicWall SMA100 = 10.2.1.1-19sv and earlier

SonicWall SMA100 = 10.2.1.2-24sv and earlier

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

badblood
Created by jbaines-r7

CVE-2021-20038-SonicWall-RCE
Created by vesperp