PT-2021-5651 · Sonicwall+1 · Sonicwall Sma410+6

Jake Baines

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Published

2021-12-07

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Updated

2025-10-31

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CVE-2021-20038

CVSS v3.1

9.8

Critical

VectorAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Name of the Vulnerable Software and Affected Versions SonicWall SMA 100 Appliances version 10.2.0.8-37sv SonicWall SMA 100 Appliances version 10.2.1.1-19sv SonicWall SMA 100 Appliances version 10.2.1.2-24sv SonicWall 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
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.
Recommendations For SonicWall SMA 100 Appliances version 10.2.0.8-37sv, update to a version later than 10.2.0.8-37sv. For SonicWall SMA 100 Appliances version 10.2.1.1-19sv, update to a version later than 10.2.1.1-19sv. For SonicWall SMA 100 Appliances version 10.2.1.2-24sv, update to a version later than 10.2.1.2-24sv. For SonicWall SMA 200, 210, 400, 410 and 500v appliances, update to a firmware version later than 10.2.1.2-24sv. As a temporary workaround, consider disabling the mod cgi module in the Apache httpd server until a patch is available.

Exploit

Fix

Stack Overflow

Memory Corruption

Weakness Enumeration

CWE-121CWE-787

Related Identifiers

BDU:2022-00089
CVE-2021-20038

Affected Products

Apache Http Server
Sonicwall Sma100 Appliance
Sonicwall Sma200
Sonicwall Sma210
Sonicwall Sma400
Sonicwall Sma410
Sonicwall Sma500V