CVE-2021-20038

KEV
Published: Dic 08, 2021 Last Modified: Ott 31, 2025
ExploitDB:
Other exploit source:
Google Dorks:
CRITICAL 9,8
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
HIGH 7,5
Source: [email protected]
Access Vector: network
Access Complexity: low
Authentication: none
Confidentiality: partial
Integrity: partial
Availability: partial

Description

AI Translation Available

A Stack-based buffer overflow vulnerability in SMA100 Apache httpd server's mod_cgi module environment variables allows a remote unauthenticated attacker to potentially execute code as a 'nobody' user in the appliance. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,9429
Percentile
1,0th
Updated

EPSS Score Trend (Last 90 Days)

121

Stack-based Buffer Overflow

Draft
Abstraction: Variant Structure: Simple
Common Consequences
Security Scopes Affected:
Availability Integrity Confidentiality Access Control Other
Potential Impacts:
Modify Memory Dos: Crash, Exit, Or Restart Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Execute Unauthorized Code Or Commands Bypass Protection Mechanism Other
Applicable Platforms
Languages: C, C++, Memory-Unsafe
Likelihood of Exploit: High
View CWE Details
787

Out-of-bounds Write

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Availability Other
Potential Impacts:
Modify Memory Execute Unauthorized Code Or Commands Dos: Crash, Exit, Or Restart Unexpected State
Applicable Platforms
Languages: Assembly, C, C++, Memory-Unsafe
Technologies: ICS/OT
Likelihood of Exploit: High
View CWE Details
Operating System

Sma 200 Firmware by Sonicwall

Product Information
Vendor Sonicwall
Product Sma 200 Firmware
Version 10.2.1.2-24sv
cpe:2.3:o:sonicwall:sma_200_firmware:10.2.1.2-24sv:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Sma 200 Firmware by Sonicwall

Product Information
Vendor Sonicwall
Product Sma 200 Firmware
Version 10.2.1.1-19sv
cpe:2.3:o:sonicwall:sma_200_firmware:10.2.1.1-19sv:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Sma 500V Firmware by Sonicwall

Product Information
Vendor Sonicwall
Product Sma 500V Firmware
Version 10.2.0.8-37sv
cpe:2.3:o:sonicwall:sma_500v_firmware:10.2.0.8-37sv:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Sma 200 Firmware by Sonicwall

Product Information
Vendor Sonicwall
Product Sma 200 Firmware
Version 10.2.0.8-37sv
cpe:2.3:o:sonicwall:sma_200_firmware:10.2.0.8-37sv:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Sma 410 Firmware by Sonicwall

Product Information
Vendor Sonicwall
Product Sma 410 Firmware
Version 10.2.0.8-37sv
cpe:2.3:o:sonicwall:sma_410_firmware:10.2.0.8-37sv:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Sma 400 Firmware by Sonicwall

Product Information
Vendor Sonicwall
Product Sma 400 Firmware
Version 10.2.1.2-24sv
cpe:2.3:o:sonicwall:sma_400_firmware:10.2.1.2-24sv:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Sma 410 Firmware by Sonicwall

Product Information
Vendor Sonicwall
Product Sma 410 Firmware
Version 10.2.1.1-19sv
cpe:2.3:o:sonicwall:sma_410_firmware:10.2.1.1-19sv:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Sma 500V Firmware by Sonicwall

Product Information
Vendor Sonicwall
Product Sma 500V Firmware
Version 10.2.1.2-24sv
cpe:2.3:o:sonicwall:sma_500v_firmware:10.2.1.2-24sv:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Sma 400 Firmware by Sonicwall

Product Information
Vendor Sonicwall
Product Sma 400 Firmware
Version 10.2.0.8-37sv
cpe:2.3:o:sonicwall:sma_400_firmware:10.2.0.8-37sv:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Sma 410 Firmware by Sonicwall

Product Information
Vendor Sonicwall
Product Sma 410 Firmware
Version 10.2.1.2-24sv
cpe:2.3:o:sonicwall:sma_410_firmware:10.2.1.2-24sv:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Sma 500V Firmware by Sonicwall

Product Information
Vendor Sonicwall
Product Sma 500V Firmware
Version 10.2.1.1-19sv
cpe:2.3:o:sonicwall:sma_500v_firmware:10.2.1.1-19sv:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Sma 210 Firmware by Sonicwall

Product Information
Vendor Sonicwall
Product Sma 210 Firmware
Version 10.2.1.2-24sv
cpe:2.3:o:sonicwall:sma_210_firmware:10.2.1.2-24sv:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Sma 400 Firmware by Sonicwall

Product Information
Vendor Sonicwall
Product Sma 400 Firmware
Version 10.2.1.1-19sv
cpe:2.3:o:sonicwall:sma_400_firmware:10.2.1.1-19sv:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Sma 210 Firmware by Sonicwall

Product Information
Vendor Sonicwall
Product Sma 210 Firmware
Version 10.2.1.1-19sv
cpe:2.3:o:sonicwall:sma_210_firmware:10.2.1.1-19sv:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Sma 210 Firmware by Sonicwall

Product Information
Vendor Sonicwall
Product Sma 210 Firmware
Version 10.2.0.8-37sv
cpe:2.3:o:sonicwall:sma_210_firmware:10.2.0.8-37sv:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://www.cisa.gov/known-exploited-vulnerabilities-catalo…
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021…
https://github.com/jbaines-r7/badblood
https://github.com/jbaines-r7/badblood
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-…
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026
https://www.rapid7.com/blog/post/2022/01/11/cve-2021-20038-…
https://www.rapid7.com/blog/post/2022/01/11/cve-2021-20038-42-sonicwall-sma-100…
https://github.com/jbaines-r7/badblood
https://github.com/jbaines-r7/badblood
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-…
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026
https://www.rapid7.com/blog/post/2022/01/11/cve-2021-20038-…
https://www.rapid7.com/blog/post/2022/01/11/cve-2021-20038-42-sonicwall-sma-100…