CVE-2021-20027 - Vulnerability Details

Description

A buffer overflow vulnerability in SonicOS allows a remote attacker to cause a Denial of Service (DoS) by sending a specially crafted request. This vulnerability affects SonicOS Gen5, Gen6, Gen7 platforms, and SonicOSv virtual firewalls.

Published: 2021-06-14

Score: 7.5 High

EPSS: 1.3% Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

SonicWall

SonicOS

affected

Version	Status	Constraints
`SonicOS 5.9.1.13 and earlier`	affected	—
`SonicOSv 6.5.4.4 and earlier`	affected	—
`SonicOS 6.0.5.3 and earlier`	affected	—
`SonicOS 6.5.1.12 and earlier`	affected	—
`SonicOS 6.5.4.7 and earlier`	affected	—
`SonicOS 7.0.1-R1219 and earlier`	affected	—
`SonicOS 7.0.1-R514 and earlier`	affected	—
`SonicOS 7.0.1-R1262 and earlier`	affected	—

Configuration 1 [-]

AND

cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*

OR	cpe:2.3:h:sonicwall:nsa_2650:-:::::::*
	cpe:2.3:h:sonicwall:nsa_2700:-:::::::*
	cpe:2.3:h:sonicwall:nsa_3650:-:::::::*
	cpe:2.3:h:sonicwall:nsa_3700:-:::::::*
	cpe:2.3:h:sonicwall:nsa_4650:-:::::::*
	cpe:2.3:h:sonicwall:nsa_4700:-:::::::*
	cpe:2.3:h:sonicwall:nsa_5650:-:::::::*
	cpe:2.3:h:sonicwall:nsa_6650:-:::::::*
	cpe:2.3:h:sonicwall:nsa_6700:-:::::::*
	cpe:2.3:h:sonicwall:nsa_9250:-:::::::*
	cpe:2.3:h:sonicwall:nsa_9450:-:::::::*
	cpe:2.3:h:sonicwall:nsa_9650:-:::::::*
	cpe:2.3:h:sonicwall:tz270:-:::::::*
	cpe:2.3:h:sonicwall:tz270w:-:::::::*
	cpe:2.3:h:sonicwall:tz300:-:::::::*
	cpe:2.3:h:sonicwall:tz300p:-:::::::*
	cpe:2.3:h:sonicwall:tz300w:-:::::::*
	cpe:2.3:h:sonicwall:tz350:-:::::::*
	cpe:2.3:h:sonicwall:tz350w:-:::::::*
	cpe:2.3:h:sonicwall:tz370:-:::::::*
	cpe:2.3:h:sonicwall:tz370w:-:::::::*
	cpe:2.3:h:sonicwall:tz400:-:::::::*
	cpe:2.3:h:sonicwall:tz400w:-:::::::*
	cpe:2.3:h:sonicwall:tz470:-:::::::*
	cpe:2.3:h:sonicwall:tz470w:-:::::::*
	cpe:2.3:h:sonicwall:tz500:-:::::::*
	cpe:2.3:h:sonicwall:tz500w:-:::::::*
	cpe:2.3:h:sonicwall:tz570:-:::::::*
	cpe:2.3:h:sonicwall:tz570p:-:::::::*
	cpe:2.3:h:sonicwall:tz570w:-:::::::*
	cpe:2.3:h:sonicwall:tz600:-:::::::*
	cpe:2.3:h:sonicwall:tz600p:-:::::::*
	cpe:2.3:h:sonicwall:tz670:-:::::::*

Configuration 2 [-]

AND

cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*

OR	cpe:2.3:h:sonicwall:nsv_10:-:::::::*
	cpe:2.3:h:sonicwall:nsv_100:-:::::::*
	cpe:2.3:h:sonicwall:nsv_1600:-:::::::*
	cpe:2.3:h:sonicwall:nsv_200:-:::::::*
	cpe:2.3:h:sonicwall:nsv_25:-:::::::*
	cpe:2.3:h:sonicwall:nsv_270:-:::::::*
	cpe:2.3:h:sonicwall:nsv_300:-:::::::*
	cpe:2.3:h:sonicwall:nsv_400:-:::::::*
	cpe:2.3:h:sonicwall:nsv_470:-:::::::*
	cpe:2.3:h:sonicwall:nsv_50:-:::::::*
	cpe:2.3:h:sonicwall:nsv_800:-:::::::*
	cpe:2.3:h:sonicwall:nsv_870:-:::::::*

Configuration 3 [-]

AND

cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*

OR	cpe:2.3:h:sonicwall:nssp_12400:-:::::::*
	cpe:2.3:h:sonicwall:nssp_12800:-:::::::*
	cpe:2.3:h:sonicwall:nssp_13700:-:::::::*
	cpe:2.3:h:sonicwall:nssp_15700:-:::::::*

Configuration 4 [-]

AND

cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*

OR	cpe:2.3:h:sonicwall:nsa_2650:-:::::::*
	cpe:2.3:h:sonicwall:nsa_2700:-:::::::*
	cpe:2.3:h:sonicwall:nsa_3650:-:::::::*
	cpe:2.3:h:sonicwall:nsa_3700:-:::::::*
	cpe:2.3:h:sonicwall:nsa_4650:-:::::::*
	cpe:2.3:h:sonicwall:nsa_4700:-:::::::*
	cpe:2.3:h:sonicwall:nsa_5650:-:::::::*
	cpe:2.3:h:sonicwall:nsa_6650:-:::::::*
	cpe:2.3:h:sonicwall:nsa_6700:-:::::::*
	cpe:2.3:h:sonicwall:nsa_9250:-:::::::*
	cpe:2.3:h:sonicwall:nsa_9450:-:::::::*
	cpe:2.3:h:sonicwall:nsa_9650:-:::::::*
	cpe:2.3:h:sonicwall:soho_250:-:::::::*
	cpe:2.3:h:sonicwall:soho_250w:-:::::::*
	cpe:2.3:h:sonicwall:tz270:-:::::::*
	cpe:2.3:h:sonicwall:tz270w:-:::::::*
	cpe:2.3:h:sonicwall:tz300:-:::::::*
	cpe:2.3:h:sonicwall:tz300p:-:::::::*
	cpe:2.3:h:sonicwall:tz300w:-:::::::*
	cpe:2.3:h:sonicwall:tz350:-:::::::*
	cpe:2.3:h:sonicwall:tz350w:-:::::::*
	cpe:2.3:h:sonicwall:tz370:-:::::::*
	cpe:2.3:h:sonicwall:tz370w:-:::::::*
	cpe:2.3:h:sonicwall:tz400:-:::::::*
	cpe:2.3:h:sonicwall:tz400w:-:::::::*
	cpe:2.3:h:sonicwall:tz470:-:::::::*
	cpe:2.3:h:sonicwall:tz470w:-:::::::*
	cpe:2.3:h:sonicwall:tz500:-:::::::*
	cpe:2.3:h:sonicwall:tz500w:-:::::::*
	cpe:2.3:h:sonicwall:tz570:-:::::::*
	cpe:2.3:h:sonicwall:tz570p:-:::::::*
	cpe:2.3:h:sonicwall:tz570w:-:::::::*
	cpe:2.3:h:sonicwall:tz600:-:::::::*
	cpe:2.3:h:sonicwall:tz600p:-:::::::*
	cpe:2.3:h:sonicwall:tz670:-:::::::*

Configuration 5 [-]

AND

cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*

OR	cpe:2.3:h:sonicwall:nssp_12400:-:::::::*
	cpe:2.3:h:sonicwall:nssp_12800:-:::::::*
	cpe:2.3:h:sonicwall:supermassive_9800:-:::::::*

Configuration 6 [-]

AND

cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*

OR	cpe:2.3:h:sonicwall:nsa_2650:-:::::::*
	cpe:2.3:h:sonicwall:nsa_2700:-:::::::*
	cpe:2.3:h:sonicwall:nsa_3650:-:::::::*
	cpe:2.3:h:sonicwall:nsa_3700:-:::::::*
	cpe:2.3:h:sonicwall:nsa_4650:-:::::::*
	cpe:2.3:h:sonicwall:nsa_4700:-:::::::*
	cpe:2.3:h:sonicwall:nsa_5650:-:::::::*
	cpe:2.3:h:sonicwall:nsa_6650:-:::::::*
	cpe:2.3:h:sonicwall:nsa_6700:-:::::::*
	cpe:2.3:h:sonicwall:nsa_9250:-:::::::*
	cpe:2.3:h:sonicwall:nsa_9450:-:::::::*
	cpe:2.3:h:sonicwall:nsa_9650:-:::::::*
	cpe:2.3:h:sonicwall:soho_250:-:::::::*
	cpe:2.3:h:sonicwall:soho_250w:-:::::::*
	cpe:2.3:h:sonicwall:supermassive_9200:-:::::::*
	cpe:2.3:h:sonicwall:supermassive_9400:-:::::::*
	cpe:2.3:h:sonicwall:supermassive_9600:-:::::::*
	cpe:2.3:h:sonicwall:tz270:-:::::::*
	cpe:2.3:h:sonicwall:tz270w:-:::::::*
	cpe:2.3:h:sonicwall:tz300:-:::::::*
	cpe:2.3:h:sonicwall:tz300p:-:::::::*
	cpe:2.3:h:sonicwall:tz300w:-:::::::*
	cpe:2.3:h:sonicwall:tz350:-:::::::*
	cpe:2.3:h:sonicwall:tz350w:-:::::::*
	cpe:2.3:h:sonicwall:tz370:-:::::::*
	cpe:2.3:h:sonicwall:tz370w:-:::::::*
	cpe:2.3:h:sonicwall:tz400:-:::::::*
	cpe:2.3:h:sonicwall:tz400w:-:::::::*
	cpe:2.3:h:sonicwall:tz470:-:::::::*
	cpe:2.3:h:sonicwall:tz470w:-:::::::*
	cpe:2.3:h:sonicwall:tz500:-:::::::*
	cpe:2.3:h:sonicwall:tz500w:-:::::::*
	cpe:2.3:h:sonicwall:tz570:-:::::::*
	cpe:2.3:h:sonicwall:tz570p:-:::::::*
	cpe:2.3:h:sonicwall:tz570w:-:::::::*
	cpe:2.3:h:sonicwall:tz600:-:::::::*
	cpe:2.3:h:sonicwall:tz600p:-:::::::*
	cpe:2.3:h:sonicwall:tz670:-:::::::*

Configuration 7 [-]

AND

cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*

OR	cpe:2.3:h:sonicwall:nsv_10:-:::::::*
	cpe:2.3:h:sonicwall:nsv_100:-:::::::*
	cpe:2.3:h:sonicwall:nsv_1600:-:::::::*
	cpe:2.3:h:sonicwall:nsv_200:-:::::::*
	cpe:2.3:h:sonicwall:nsv_25:-:::::::*
	cpe:2.3:h:sonicwall:nsv_270:-:::::::*
	cpe:2.3:h:sonicwall:nsv_300:-:::::::*
	cpe:2.3:h:sonicwall:nsv_400:-:::::::*
	cpe:2.3:h:sonicwall:nsv_470:-:::::::*
	cpe:2.3:h:sonicwall:nsv_50:-:::::::*
	cpe:2.3:h:sonicwall:nsv_800:-:::::::*
	cpe:2.3:h:sonicwall:nsv_870:-:::::::*

Configuration 8 [-]

AND

cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*

OR	cpe:2.3:h:sonicwall:supermassive_e10200:-:::::::*
	cpe:2.3:h:sonicwall:supermassive_e10400:-:::::::*
	cpe:2.3:h:sonicwall:supermassive_e10800:-:::::::*

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2021-7490	A buffer overflow vulnerability in SonicOS allows a remote attacker to cause a Denial of Service (DoS) by sending a specially crafted request. This vulnerability affects SonicOS Gen5, Gen6, Gen7 platforms, and SonicOSv virtual firewalls.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.01291.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0016

History

No history.

Subscriptions

Sonicwall Nsa 2650 Nsa 2700 Nsa 3650 Nsa 3700 Nsa 4650 Nsa 4700 Nsa 5650 Nsa 6650 Nsa 6700 Nsa 9250 Nsa 9450 Nsa 9650 Nssp 12400 Nssp 12800 Nssp 13700 Nssp 15700 Nsv 10 Nsv 100 Nsv 1600 Nsv 200 Nsv 25 Nsv 270 Nsv 300 Nsv 400 Nsv 470 Nsv 50 Nsv 800 Nsv 870 Soho 250 Soho 250w Sonicos Supermassive 9200 Supermassive 9400 Supermassive 9600 Supermassive 9800 Supermassive E10200 Supermassive E10400 Supermassive E10800 Tz270 Tz270w Tz300 Tz300p Tz300w Tz350 Tz350w Tz370 Tz370w Tz400 Tz400w Tz470 Tz470w Tz500 Tz500w Tz570 Tz570p Tz570w Tz600 Tz600p Tz670

MITRE

Status: PUBLISHED

Assigner: sonicwall

Published: 2021-06-14T22:30:11.000Z

Updated: 2024-08-03T17:30:07.579Z

Reserved: 2020-12-17T00:00:00.000Z

Link: CVE-2021-20027

Vulnrichment

No data.

NVD

Status : Modified

Published: 2021-06-14T23:15:07.473

Modified: 2026-06-17T03:33:10.257

Link: CVE-2021-20027

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Tracking

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

Subscriptions

JSON object

JSON object

JSON object

JSON object

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