VDB-187745 · CVE-2021-20040 · SNWLID-2021-0026

SonicWALL SMA 100/SMA 200/SMA 210/SMA 400/SMA 410/SMA 500v Upload path traversal

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 classified as problematic. This affects an unknown function of the component Upload. The manipulation leads to path traversal. This vulnerability is referenced as CVE-2021-20040. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in SonicWALL SMA 100, SMA 200, SMA 210, SMA 400, SMA 410 and SMA 500v (Firewall Software) and classified as critical. This issue affects an unknown code block of the component Upload. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-23. The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory. Impacted is confidentiality, integrity, and availability.

The weakness was published 12/08/2021 as SNWLID-2021-0026. The advisory is shared at psirt.global.sonicwall.com. The identification of this vulnerability is CVE-2021-20040 since 12/17/2020. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

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

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Path traversal
CWE: CWE-23 / CWE-22
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-2021-20040 (🔍)
GCVE (CVE): GCVE-0-2021-20040
GCVE (VulDB): GCVE-100-187745

Entryinfo

Created: 12/08/2021 13:07
Updated: 12/11/2021 07:37
Changes: 12/08/2021 13:07 (38), 12/11/2021 07:31 (2), 12/11/2021 07:37 (1)
Complete: 🔍
Cache ID: 216::103