CVE-2021-20038
CriticalActively exploited (CISA KEV)Known to be used in ransomware campaigns
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
SonicWall SMA 100 Appliances
PublishedDec 8, 2021
First seenDec 8, 2021
Added to KEVJan 28, 2022
Weakness typeCWE-121CWE-121
How to fix
CISA required action
Apply updates per vendor instructions.
CISA due date: Feb 11, 2022Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| sonicwall sma_200_firmware | 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv | — |
| sonicwall sma_210_firmware | 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv | — |
| sonicwall sma_410_firmware | 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv | — |
| sonicwall sma_400_firmware | 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv | — |
| sonicwall sma_500v_firmware | 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv | — |
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