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CVE-2021-20038SonicWall SMA 100 Appliances Stack-Based Buffer Overflow Vulnerability
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.
9.8 CRITICALEPSS 99.91%⚡ Known Exploited (CISA KEV)NVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 9.8 | CRITICAL | 3.1NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 7.5 | HIGH | 2.0NVD | AV:N/AC:L/Au:N/C:P/I:P/A:P |
CISA required action
⚡ Known exploited · remediation due Feb 11, 2022
Apply updates per vendor instructions.
Details
- CVE ID
- CVE-2021-20038
- Status
- Analyzed
- Assigner (CNA)
- sonicwall
- Published
- Dec 8, 2021
- Last modified
- 2026-06-17 03:33 UTC
Affected Products
As published by the CNA in the CVE record.
SonicWallSonicWall SMA1003 version ranges
- 10.2.0.8-37sv and earlier
- 10.2.1.1-19sv and earlier
- 10.2.1.2-24sv and earlier
References
- github.com https://github.com/jbaines-r7/badblood
- psirt.global.sonicwall.com https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026
- rapid7.com https://www.rapid7.com/blog/post/2022/01/11/cve-2021-20038-42-sonicwall-sma-100-multiple-vulnerabilities-fixed-2/
- cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20038