CVE-2021-20041 — Infinite Loop in Sma100

CWE-835 — Infinite Loop4 documents4 sources
Severity
7.5HIGHNVD
EPSS
0.6%
top 30.48%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
6
Sonicwall Sma100Sonicwall SMA 200 FirmwareSonicwall SMA 210 Firmware+3 more
Timeline
PublishedDec 8
Latest updateApr 14

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages6 packages

▶CVEListV5sonicwall/sonicwall_sma1004 versions+3
▶NVDsonicwall/sma_500v_firmware10.2.0.8-37sv, 10.2.1.1-19sv, 9.0.0.11-31sv+2
▶NVDsonicwall/sma_200_firmware10.2.0.8-37sv, 10.2.1.1-19sv, 9.0.0.11-31sv+2
▶NVDsonicwall/sma_210_firmware10.2.0.8-37sv, 10.2.1.1-19sv, 9.0.0.11-31sv+2
▶NVDsonicwall/sma_400_firmware10.2.0.8-37sv, 10.2.1.1-19sv, 9.0.0.11-31sv+2

🔴Vulnerability Details

2
GHSA
GHSA-qhp6-xj37-53m2: An unauthenticated and remote adversary can consume all of the device's CPU due to crafted HTTP requests sent to SMA100 /fileshare/sonicfiles/sonicfil↗2021-12-09
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CVEList
CVE-2021-20041: An unauthenticated and remote adversary can consume all of the device's CPU due to crafted HTTP requests sent to SMA100 /fileshare/sonicfiles/sonicfil↗2021-12-08
▶

🔍Detection Rules

1
Suricata
ET WEB_SERVER SonicWall SMA Unauthenticated sonicfiles CPU Exhaustion (CVE-2021-20041)↗2025-04-14
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CVE-2021-20041 — Infinite Loop in Sonicwall Sma100 | cvebase