Infinite loop in SMA 100 - CVE-2021-20041
Published: December 7, 2021
Vulnerability identifier: #VU58622
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-20041
CWE-ID: CWE-835
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: SonicWall
Affected software:
SMA 100
SMA 100
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop in the "/fileshare/sonicfiles/sonicfiles" endpoint in the `fileexplorer` process. A remote non-authenticated attacker can send specially crafted HTTP request to the system and consume all available CPU resources.
How to mitigate CVE-2021-20041
Install updates from vendor's website.