CVE-2021-20038: SonicWall SMA 100 Appliances Stack-Based Buffer Overflow Vulnerability
First published: Wed Dec 08 2021(Updated: )
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.
Credit: PSIRT@sonicwall.com PSIRT@sonicwall.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| SonicWall SMA100 SSLVPN | ||
| SonicWall SMA 200 firmware | =10.2.0.8-37sv | |
| SonicWall SMA 200 firmware | =10.2.1.1-19sv | |
| SonicWall SMA 200 firmware | =10.2.1.2-24sv | |
| SonicWall SMA 200 firmware | ||
| SonicWall SMA 210 | =10.2.0.8-37sv | |
| SonicWall SMA 210 | =10.2.1.1-19sv | |
| SonicWall SMA 210 | =10.2.1.2-24sv | |
| SonicWall SMA 210 Firmware | ||
| SonicWall SMA 410 | =10.2.0.8-37sv | |
| SonicWall SMA 410 | =10.2.1.1-19sv | |
| SonicWall SMA 410 | =10.2.1.2-24sv | |
| SonicWall SMA 410 | ||
| SonicWall SMA 400 firmware | =10.2.0.8-37sv | |
| SonicWall SMA 400 firmware | =10.2.1.1-19sv | |
| SonicWall SMA 400 firmware | =10.2.1.2-24sv | |
| SonicWall SMA 400 firmware | ||
| SonicWall SMA 500v Firmware | =10.2.0.8-37sv | |
| SonicWall SMA 500v Firmware | =10.2.1.1-19sv | |
| SonicWall SMA 500v Firmware | =10.2.1.2-24sv | |
| SonicWall SMA 500v Firmware | ||
| All of | ||
| Any of | ||
| SonicWall SMA 200 firmware | =10.2.0.8-37sv | |
| SonicWall SMA 200 firmware | =10.2.1.1-19sv | |
| SonicWall SMA 200 firmware | =10.2.1.2-24sv | |
| SonicWall SMA 200 firmware | ||
| All of | ||
| Any of | ||
| SonicWall SMA 210 | =10.2.0.8-37sv | |
| SonicWall SMA 210 | =10.2.1.1-19sv | |
| SonicWall SMA 210 | =10.2.1.2-24sv | |
| SonicWall SMA 210 Firmware | ||
| All of | ||
| Any of | ||
| SonicWall SMA 410 | =10.2.0.8-37sv | |
| SonicWall SMA 410 | =10.2.1.1-19sv | |
| SonicWall SMA 410 | =10.2.1.2-24sv | |
| SonicWall SMA 410 | ||
| All of | ||
| Any of | ||
| SonicWall SMA 400 firmware | =10.2.0.8-37sv | |
| SonicWall SMA 400 firmware | =10.2.1.1-19sv | |
| SonicWall SMA 400 firmware | =10.2.1.2-24sv | |
| SonicWall SMA 400 firmware | ||
| All of | ||
| Any of | ||
| SonicWall SMA 500v Firmware | =10.2.0.8-37sv | |
| SonicWall SMA 500v Firmware | =10.2.1.1-19sv | |
| SonicWall SMA 500v Firmware | =10.2.1.2-24sv | |
| SonicWall SMA 500v Firmware |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID for the SonicWall SMA 100 Appliances stack-based buffer overflow vulnerability?
The vulnerability ID for the SonicWall SMA 100 Appliances stack-based buffer overflow vulnerability is CVE-2021-20038.
What is the severity of CVE-2021-20038?
The severity of CVE-2021-20038 is critical with a CVSS score of 9.8.
Which SonicWall SMA 100 Appliances firmware versions are affected by CVE-2021-20038?
SonicWall SMA 200, 210, 400, 410, and 500v appliances firmware versions 10.2.0.8-37sv, 10.2.1.1-19sv, and 10.2.1.2-24sv are affected by CVE-2021-20038.
How can an attacker exploit CVE-2021-20038?
A remote unauthenticated attacker can exploit CVE-2021-20038 by exploiting a stack-based buffer overflow vulnerability in SMA100 Apache httpd server's mod_cgi module environment variables, potentially executing code as a 'nobody' user on the affected appliance.
Are SonicWall SMA 200, 210, 400, 410, and 500v appliances vulnerable to CVE-2021-20038?
Yes, SonicWall SMA 200, 210, 400, 410, and 500v appliances are vulnerable to CVE-2021-20038 if they are running the affected firmware versions.
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- agent/software-canonical-lookup-request
- agent/tags
- agent/softwarecombine
- collector/nvd-index
- collector/nvd-cve
- source/NVD
- vendor/sonicwall
- canonical/sonicwall sma100 sslvpn
- canonical/sonicwall sma 200 firmware
- version/sonicwall sma 200 firmware/10.2.0.8-37sv
- version/sonicwall sma 200 firmware/10.2.1.1-19sv
- version/sonicwall sma 200 firmware/10.2.1.2-24sv
- canonical/sonicwall sma 210
- version/sonicwall sma 210/10.2.0.8-37sv
- version/sonicwall sma 210/10.2.1.1-19sv
- version/sonicwall sma 210/10.2.1.2-24sv
- canonical/sonicwall sma 210 firmware
- canonical/sonicwall sma 410
- version/sonicwall sma 410/10.2.0.8-37sv
- version/sonicwall sma 410/10.2.1.1-19sv
- version/sonicwall sma 410/10.2.1.2-24sv
- canonical/sonicwall sma 400 firmware
- version/sonicwall sma 400 firmware/10.2.0.8-37sv
- version/sonicwall sma 400 firmware/10.2.1.1-19sv
- version/sonicwall sma 400 firmware/10.2.1.2-24sv
- canonical/sonicwall sma 500v firmware
- version/sonicwall sma 500v firmware/10.2.0.8-37sv
- version/sonicwall sma 500v firmware/10.2.1.1-19sv
- version/sonicwall sma 500v firmware/10.2.1.2-24sv