CVE-2021-20041
First published: Wed Dec 08 2021(Updated: )
An unauthenticated and remote adversary can consume all of the device's CPU due to crafted HTTP requests sent to SMA100 /fileshare/sonicfiles/sonicfiles resulting in a loop with unreachable exit condition. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.
Credit: PSIRT@sonicwall.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Sonicwall Sma 200 Firmware | =9.0.0.11-31sv | |
| Sonicwall Sma 200 Firmware | =10.2.0.8-37sv | |
| Sonicwall Sma 200 Firmware | =10.2.1.1-19sv | |
| Sonicwall Sma 200 | ||
| Sonicwall Sma 210 Firmware | =9.0.0.11-31sv | |
| Sonicwall Sma 210 Firmware | =10.2.0.8-37sv | |
| Sonicwall Sma 210 Firmware | =10.2.1.1-19sv | |
| Sonicwall Sma 210 | ||
| Sonicwall Sma 410 Firmware | =9.0.0.11-31sv | |
| Sonicwall Sma 410 Firmware | =10.2.0.8-37sv | |
| Sonicwall Sma 410 Firmware | =10.2.1.1-19sv | |
| Sonicwall Sma 410 | ||
| Sonicwall Sma 400 Firmware | =9.0.0.11-31sv | |
| Sonicwall Sma 400 Firmware | =10.2.0.8-37sv | |
| Sonicwall Sma 400 Firmware | =10.2.1.1-19sv | |
| Sonicwall Sma 400 | ||
| Sonicwall Sma 500v Firmware | =9.0.0.11-31sv | |
| Sonicwall Sma 500v Firmware | =10.2.0.8-37sv | |
| Sonicwall Sma 500v Firmware | =10.2.1.1-19sv | |
| Sonicwall Sma 500v |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Frequently Asked Questions
What is CVE-2021-20041?
CVE-2021-20041 is a vulnerability in the Sonicwall SMA appliances that allows an unauthenticated remote adversary to consume all of the device's CPU by sending crafted HTTP requests.
Which devices are affected by CVE-2021-20041?
CVE-2021-20041 affects the SMA 200, 210, 400, 410, and 500v appliances.
What is the severity of CVE-2021-20041?
CVE-2021-20041 has a severity score of 7.5, which is considered high.
How can I fix CVE-2021-20041?
To fix CVE-2021-20041, users should update their Sonicwall SMA firmware to the latest version provided by Sonicwall.
Where can I find more information about CVE-2021-20041?
You can find more information about CVE-2021-20041 on the Sonicwall PSIRT website.
- collector/nvd-index
- agent/severity
- agent/references
- agent/author
- agent/type
- agent/event
- agent/weakness
- agent/tags
- agent/description
- agent/last-modified-date
- agent/softwarecombine
- agent/first-publish-date
- collector/mitre-cve
- source/MITRE
- vendor/sonicwall
- canonical/sonicwall sma 200 firmware
- version/sonicwall sma 200 firmware/9.0.0.11-31sv
- version/sonicwall sma 200 firmware/10.2.0.8-37sv
- version/sonicwall sma 200 firmware/10.2.1.1-19sv
- canonical/sonicwall sma 200
- canonical/sonicwall sma 210 firmware
- version/sonicwall sma 210 firmware/9.0.0.11-31sv
- version/sonicwall sma 210 firmware/10.2.0.8-37sv
- version/sonicwall sma 210 firmware/10.2.1.1-19sv
- canonical/sonicwall sma 210
- canonical/sonicwall sma 410 firmware
- version/sonicwall sma 410 firmware/9.0.0.11-31sv
- version/sonicwall sma 410 firmware/10.2.0.8-37sv
- version/sonicwall sma 410 firmware/10.2.1.1-19sv
- canonical/sonicwall sma 410
- canonical/sonicwall sma 400 firmware
- version/sonicwall sma 400 firmware/9.0.0.11-31sv
- version/sonicwall sma 400 firmware/10.2.0.8-37sv
- version/sonicwall sma 400 firmware/10.2.1.1-19sv
- canonical/sonicwall sma 400
- canonical/sonicwall sma 500v firmware
- version/sonicwall sma 500v firmware/9.0.0.11-31sv
- version/sonicwall sma 500v firmware/10.2.0.8-37sv
- version/sonicwall sma 500v firmware/10.2.1.1-19sv
- canonical/sonicwall sma 500v