Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Sonicwall | Sma 200 Firmware | 10.2.0.8-37sv |
| Sonicwall | Sma 200 | - |
| Sonicwall | Sma 210 Firmware | 10.2.0.8-37sv |
| Sonicwall | Sma 210 | - |
| Sonicwall | Sma 410 Firmware | 10.2.0.8-37sv |
| Sonicwall | Sma 410 | - |
| Sonicwall | Sma 400 Firmware | 10.2.0.8-37sv |
| Sonicwall | Sma 400 | - |
| Sonicwall | Sma 500V Firmware | 10.2.0.8-37sv |
| Sonicwall | Sma 500V | - |
Related Weaknesses (CWE)
References
- https://github.com/jbaines-r7/badbloodExploitThird Party Advisory
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026Vendor Advisory
- https://www.rapid7.com/blog/post/2022/01/11/cve-2021-20038-42-sonicwall-sma-100-ExploitThird Party Advisory
- https://github.com/jbaines-r7/badbloodExploitThird Party Advisory
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026Vendor Advisory
- https://www.rapid7.com/blog/post/2022/01/11/cve-2021-20038-42-sonicwall-sma-100-ExploitThird Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-US Government Resource
FAQ
What is CVE-2021-20038?
CVE-2021-20038 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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...
How severe is CVE-2021-20038?
CVE-2021-20038 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2021-20038?
Check the references section above for vendor advisories and patch information. Affected products include: Sonicwall Sma 200 Firmware, Sonicwall Sma 200, Sonicwall Sma 210 Firmware, Sonicwall Sma 210, Sonicwall Sma 410 Firmware.