CVE-2021-20039

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-20039
Improper neutralization of special elements in the SMA100 management interface '/cgi-bin/viewcert' POST http method allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.

8.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

9.0 /10

CVSS v2.0 : HIGH

V2 Legend

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

Exploitability : 8.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References
Link Resource
http://packetstormsecurity.com/files/165563/SonicWall-SMA-100-Series-Authenticated-Command-Injection.html Exploit Third Party Advisory VDB Entry
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026 Vendor Advisory
http://packetstormsecurity.com/files/165563/SonicWall-SMA-100-Series-Authenticated-Command-Injection.html Exploit Third Party Advisory VDB Entry
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026 Vendor Advisory
https://attackerkb.com/topics/9szJhq46lw/cve-2021-20039/rapid7-analysis
Configurations

Configuration 1 (hide)

AND
OR cpe:2.3:o:sonicwall:sma_200_firmware:9.0.0.11-31sv:*:*:*:*:*:*:*
cpe:2.3:o:sonicwall:sma_200_firmware:10.2.0.8-37sv:*:*:*:*:*:*:*
cpe:2.3:o:sonicwall:sma_200_firmware:10.2.1.1-19sv:*:*:*:*:*:*:*
cpe:2.3:h:sonicwall:sma_200:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND
OR cpe:2.3:o:sonicwall:sma_210_firmware:9.0.0.11-31sv:*:*:*:*:*:*:*
cpe:2.3:o:sonicwall:sma_210_firmware:10.2.0.8-37sv:*:*:*:*:*:*:*
cpe:2.3:o:sonicwall:sma_210_firmware:10.2.1.1-19sv:*:*:*:*:*:*:*
cpe:2.3:h:sonicwall:sma_210:-:*:*:*:*:*:*:*

Configuration 3 (hide)

AND
OR cpe:2.3:o:sonicwall:sma_410_firmware:9.0.0.11-31sv:*:*:*:*:*:*:*
cpe:2.3:o:sonicwall:sma_410_firmware:10.2.0.8-37sv:*:*:*:*:*:*:*
cpe:2.3:o:sonicwall:sma_410_firmware:10.2.1.1-19sv:*:*:*:*:*:*:*
cpe:2.3:h:sonicwall:sma_410:-:*:*:*:*:*:*:*

Configuration 4 (hide)

AND
OR cpe:2.3:o:sonicwall:sma_400_firmware:9.0.0.11-31sv:*:*:*:*:*:*:*
cpe:2.3:o:sonicwall:sma_400_firmware:10.2.0.8-37sv:*:*:*:*:*:*:*
cpe:2.3:o:sonicwall:sma_400_firmware:10.2.1.1-19sv:*:*:*:*:*:*:*
cpe:2.3:h:sonicwall:sma_400:-:*:*:*:*:*:*:*

Configuration 5 (hide)

AND
OR cpe:2.3:o:sonicwall:sma_500v_firmware:9.0.0.11-31sv:*:*:*:*:*:*:*
cpe:2.3:o:sonicwall:sma_500v_firmware:10.2.0.8-37sv:*:*:*:*:*:*:*
cpe:2.3:o:sonicwall:sma_500v_firmware:10.2.1.1-19sv:*:*:*:*:*:*:*
cpe:2.3:h:sonicwall:sma_500v:-:*:*:*:*:*:*:*
History

05 Sep 2025, 18:15

Type Values Removed Values Added
References
  • () https://attackerkb.com/topics/9szJhq46lw/cve-2021-20039/rapid7-analysis -

21 Nov 2024, 05:45

Type Values Removed Values Added
References () http://packetstormsecurity.com/files/165563/SonicWall-SMA-100-Series-Authenticated-Command-Injection.html - Exploit, Third Party Advisory, VDB Entry () http://packetstormsecurity.com/files/165563/SonicWall-SMA-100-Series-Authenticated-Command-Injection.html - Exploit, Third Party Advisory, VDB Entry
References () https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026 - Vendor Advisory () https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026 - Vendor Advisory
Information

Published : 2021-12-08 10:15

Updated : 2025-09-05 18:15

NVD link : CVE-2021-20039

Mitre link : CVE-2021-20039

CVE.ORG link : CVE-2021-20039

JSON object : View

Products Affected

sonicwall

  • sma_400_firmware
  • sma_210_firmware
  • sma_200
  • sma_410
  • sma_410_firmware
  • sma_500v_firmware
  • sma_400
  • sma_200_firmware
  • sma_210
  • sma_500v
CWE
CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')