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[email protected]CVE-2021-20041

HistoryDec 08, 2021 - 10:15 a.m.

CVE-2021-20041

2021-12-0810:15:00

CWE-835

[email protected]

web.nvd.nist.gov

cve-2021-20041

unauthenticated access

remote exploit

cpu consumption

sma appliances

nvd

security vulnerability

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

8.6 High

AI Score

Confidence

High

7.8 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:N/I:N/A:C

0.003 Low

EPSS

Percentile

69.4%

JSON

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.

CPENameOperatorVersion
sonicwall:sma_200_firmwaresonicwall sma 200 firmwareeq9.0.0.11-31sv
sonicwall:sma_200_firmwaresonicwall sma 200 firmwareeq10.2.0.8-37sv
sonicwall:sma_200_firmwaresonicwall sma 200 firmwareeq10.2.1.1-19sv
sonicwall:sma_210_firmwaresonicwall sma 210 firmwareeq9.0.0.11-31sv
sonicwall:sma_210_firmwaresonicwall sma 210 firmwareeq10.2.0.8-37sv
sonicwall:sma_210_firmwaresonicwall sma 210 firmwareeq10.2.1.1-19sv
sonicwall:sma_410_firmwaresonicwall sma 410 firmwareeq9.0.0.11-31sv
sonicwall:sma_410_firmwaresonicwall sma 410 firmwareeq10.2.0.8-37sv
sonicwall:sma_410_firmwaresonicwall sma 410 firmwareeq10.2.1.1-19sv
sonicwall:sma_400_firmwaresonicwall sma 400 firmwareeq9.0.0.11-31sv

CPE	Name	Operator	Version
sonicwall:sma_200_firmware	sonicwall sma 200 firmware	eq	9.0.0.11-31sv
sonicwall:sma_200_firmware	sonicwall sma 200 firmware	eq	10.2.0.8-37sv
sonicwall:sma_200_firmware	sonicwall sma 200 firmware	eq	10.2.1.1-19sv
sonicwall:sma_210_firmware	sonicwall sma 210 firmware	eq	9.0.0.11-31sv
sonicwall:sma_210_firmware	sonicwall sma 210 firmware	eq	10.2.0.8-37sv
sonicwall:sma_210_firmware	sonicwall sma 210 firmware	eq	10.2.1.1-19sv
sonicwall:sma_410_firmware	sonicwall sma 410 firmware	eq	9.0.0.11-31sv
sonicwall:sma_410_firmware	sonicwall sma 410 firmware	eq	10.2.0.8-37sv
sonicwall:sma_410_firmware	sonicwall sma 410 firmware	eq	10.2.1.1-19sv
sonicwall:sma_400_firmware	sonicwall sma 400 firmware	eq	9.0.0.11-31sv

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References

psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

8.6 High

AI Score

Confidence

High

7.8 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:N/I:N/A:C

0.003 Low

EPSS

Percentile

69.4%

JSON

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