Stack-Based Buffer Overflow in SMA100 Apache httpd Server by SonicWall
CVE-2021-20038

9.8CRITICAL

Key Information:

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

Badges

💰 Ransomware👾 Exploit Exists🟡 Public PoC🟣 EPSS 96%🦅 CISA Reported

Summary

A stack-based buffer overflow vulnerability in the Apache httpd server's mod_cgi module on SonicWall's SMA100 appliances could allow a remote, unauthenticated attacker to execute arbitrary code with the privileges of the 'nobody' user. This issue affects multiple SMA appliance models, specifically versions prior to firmware updates 10.2.0.8-37sv, 10.2.1.1-19sv, and 10.2.1.2-24sv. Users are advised to update their firmware to mitigate this risk and secure their systems against potential exploitation.

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 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