VDB-187747 · CVE-2021-20042 · SNWLID-2021-0026

SonicWALL SMA 100/SMA 200/SMA 210/SMA 400/SMA 410/SMA 500v Firewall Rule confused deputy

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.3	$0-$5k	0.00

Summaryinfo

A vulnerability was found in SonicWALL SMA 100, SMA 200, SMA 210, SMA 400, SMA 410 and SMA 500v. It has been rated as critical. Affected is an unknown function of the component Firewall Rule Handler. This manipulation causes confused deputy. This vulnerability is tracked as CVE-2021-20042. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in SonicWALL SMA 100, SMA 200, SMA 210, SMA 400, SMA 410 and SMA 500v (Firewall Software). It has been declared as critical. Affected by this vulnerability is an unknown function of the component Firewall Rule Handler. The manipulation with an unknown input leads to a confused deputy vulnerability. The CWE definition for the vulnerability is CWE-441. The product receives a request, message, or directive from an upstream component, but the product does not sufficiently preserve the original source of the request before forwarding the request to an external actor that is outside of the product's control sphere. This causes the product to appear to be the source of the request, leading it to act as a proxy or other intermediary between the upstream component and the external actor. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was disclosed 12/08/2021 as SNWLID-2021-0026. It is possible to read the advisory at psirt.global.sonicwall.com. This vulnerability is known as CVE-2021-20042 since 12/17/2020. The technical details are unknown and an exploit is not publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

Firewall Software

Vendor

SonicWALL

Name

License

commercial

Website

Vendor: https://www.sonicwall.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Confused deputy
CWE: CWE-441
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/17/2020 🔍
12/08/2021 +356 days 🔍
12/08/2021 +0 days 🔍
12/11/2021 +3 days 🔍

Sourcesinfo

Vendor: sonicwall.com

Advisory: SNWLID-2021-0026
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-20042 (🔍)
GCVE (CVE): GCVE-0-2021-20042
GCVE (VulDB): GCVE-100-187747

Entryinfo

Created: 12/08/2021 13:21
Updated: 12/11/2021 07:53
Changes: 12/08/2021 13:21 (37), 12/11/2021 07:53 (2)
Complete: 🔍
Cache ID: 216::103