9.8
CVE-2021-20038
- EPSS 94.29%
- Published 08.12.2021 10:15:07
- Last modified 30.07.2025 18:58:44
- Source PSIRT@sonicwall.com
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- Open Login
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.
Data is provided by the National Vulnerability Database (NVD)
Sonicwall ≫ Sma 200 Firmware Version10.2.0.8-37sv
Sonicwall ≫ Sma 200 Firmware Version10.2.1.1-19sv
Sonicwall ≫ Sma 200 Firmware Version10.2.1.2-24sv
Sonicwall ≫ Sma 210 Firmware Version10.2.0.8-37sv
Sonicwall ≫ Sma 210 Firmware Version10.2.1.1-19sv
Sonicwall ≫ Sma 210 Firmware Version10.2.1.2-24sv
Sonicwall ≫ Sma 410 Firmware Version10.2.0.8-37sv
Sonicwall ≫ Sma 410 Firmware Version10.2.1.1-19sv
Sonicwall ≫ Sma 410 Firmware Version10.2.1.2-24sv
Sonicwall ≫ Sma 400 Firmware Version10.2.0.8-37sv
Sonicwall ≫ Sma 400 Firmware Version10.2.1.1-19sv
Sonicwall ≫ Sma 400 Firmware Version10.2.1.2-24sv
Sonicwall ≫ Sma 500v Firmware Version10.2.0.8-37sv
Sonicwall ≫ Sma 500v Firmware Version10.2.1.1-19sv
Sonicwall ≫ Sma 500v Firmware Version10.2.1.2-24sv
28.01.2022: CISA Known Exploited Vulnerabilities (KEV) Catalog
SonicWall SMA 100 Appliances Stack-Based Buffer Overflow Vulnerability
VulnerabilitySonicWall SMA 100 devies are vulnerable to an unauthenticated stack-based buffer overflow vulnerability where exploitation can result in code execution.
DescriptionApply updates per vendor instructions.
Required actions| Type | Source | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 94.29% | 0.999 |
| Source | Base Score | Exploit Score | Impact Score | Vector string |
|---|---|---|---|---|
| nvd@nist.gov | 9.8 | 3.9 | 5.9 |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
|
| nvd@nist.gov | 7.5 | 10 | 6.4 |
AV:N/AC:L/Au:N/C:P/I:P/A:P
|
| 134c704f-9b21-4f2e-91b3-4a467353bcc0 | 9.8 | 3.9 | 5.9 |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
|
CWE-121 Stack-based Buffer Overflow
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
CWE-787 Out-of-bounds Write
The product writes data past the end, or before the beginning, of the intended buffer.