CVE-2021-20038
Summary
| CVE | CVE-2021-20038 |
|---|---|
| State | PUBLIC |
| Assigner | [email protected] |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2021-12-08 10:15:00 UTC |
| Updated | 2022-05-13 14:54:00 UTC |
| 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. |
Risk And Classification
EPSS: 0.942920000 probability, percentile 0.999410000 (date 2026-04-01)
CISA KEV: Listed on 2022-01-28; due 2022-02-11; ransomware use Known
Problem Types: CWE-787
CISA Known Exploited Vulnerability
| Vendor | SonicWall |
|---|---|
| Product | SMA 100 Appliances |
| Name | SonicWall SMA 100 Appliances Stack-Based Buffer Overflow Vulnerability |
| Required Action | Apply updates per vendor instructions. |
| Notes | https://nvd.nist.gov/vuln/detail/CVE-2021-20038 |
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Hardware | Sonicwall | Sma 200 | - | All | All | All |
| Operating System | Sonicwall | Sma 200 Firmware | 10.2.0.8-37sv | All | All | All |
| Operating System | Sonicwall | Sma 200 Firmware | 10.2.1.1-19sv | All | All | All |
| Operating System | Sonicwall | Sma 200 Firmware | 10.2.1.2-24sv | All | All | All |
| Hardware | Sonicwall | Sma 210 | - | All | All | All |
| Operating System | Sonicwall | Sma 210 Firmware | 10.2.0.8-37sv | All | All | All |
| Operating System | Sonicwall | Sma 210 Firmware | 10.2.1.1-19sv | All | All | All |
| Operating System | Sonicwall | Sma 210 Firmware | 10.2.1.2-24sv | All | All | All |
| Hardware | Sonicwall | Sma 400 | - | All | All | All |
| Operating System | Sonicwall | Sma 400 Firmware | 10.2.0.8-37sv | All | All | All |
| Operating System | Sonicwall | Sma 400 Firmware | 10.2.1.1-19sv | All | All | All |
| Operating System | Sonicwall | Sma 400 Firmware | 10.2.1.2-24sv | All | All | All |
| Hardware | Sonicwall | Sma 410 | - | All | All | All |
| Operating System | Sonicwall | Sma 410 Firmware | 10.2.0.8-37sv | All | All | All |
| Operating System | Sonicwall | Sma 410 Firmware | 10.2.1.1-19sv | All | All | All |
| Operating System | Sonicwall | Sma 410 Firmware | 10.2.1.2-24sv | All | All | All |
| Hardware | Sonicwall | Sma 500v | - | All | All | All |
| Operating System | Sonicwall | Sma 500v Firmware | 10.2.0.8-37sv | All | All | All |
| Operating System | Sonicwall | Sma 500v Firmware | 10.2.1.1-19sv | All | All | All |
| Operating System | Sonicwall | Sma 500v Firmware | 10.2.1.2-24sv | All | All | All |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| GitHub - jbaines-r7/badblood: SonicWall SMA-100 Unauth RCE Exploit (CVE-2021-20038) | MISC | github.com | |
| Security Advisory | CONFIRM | psirt.global.sonicwall.com | |
| CVE-2021-20038..42: SonicWall SMA 100 Multiple Vulnerabilities (FIXED) | Rapid7 Blog | MISC | www.rapid7.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
| CISA Known Exploited Vulnerabilities catalog | CISA | www.cisa.gov | kev |
No vendor comments have been submitted for this CVE.
Legacy QID Mappings
- 730337 SonicWall Secure Mobile Access 100 Multiple Vulnerabilities (SNWLID-2021-0026)