CVE-2021-20041: sonicwall sma_200_firmware Infinite Loop

Vulnerability summary

CVE-2021-20041 is a high (CVSS 7.8) Infinite Loop vulnerability in sonicwall sma_200_firmware. EPSS estimates a 21.20% chance of exploitation in the next 30 days, higher than 97.5% of scored vulnerabilities.

Timeline

1. 08-12-2021
   PublishedVulnerability first disclosed.
2. 03-08-2024
   Last modifiedVulnerability information updated.

Description

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.

• CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.