CVE-2021-20038

CVSS V2 High 7.5 CVSS V3 Critical 9.8
Description
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.
Overview
  • CVE ID
  • CVE-2021-20038
  • Assigner
  • PSIRT@sonicwall.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-12-08T10:15:07
  • Last Modified Date
  • 2022-05-13T14:54:32
Weakness Enumerations
CWE URL
CWE-787 http://cwe.mitre.org/data/definitions/787.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:sonicwall:sma_200_firmware:10.2.0.8-37sv:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:sonicwall:sma_200_firmware:10.2.1.1-19sv:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:sonicwall:sma_200_firmware:10.2.1.2-24sv:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:sonicwall:sma_200:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:sonicwall:sma_210_firmware:10.2.0.8-37sv:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:sonicwall:sma_210_firmware:10.2.1.1-19sv:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:sonicwall:sma_210_firmware:10.2.1.2-24sv:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:sonicwall:sma_210:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:sonicwall:sma_410_firmware:10.2.0.8-37sv:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:sonicwall:sma_410_firmware:10.2.1.1-19sv:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:sonicwall:sma_410_firmware:10.2.1.2-24sv:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:sonicwall:sma_410:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:sonicwall:sma_400_firmware:10.2.0.8-37sv:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:sonicwall:sma_400_firmware:10.2.1.1-19sv:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:sonicwall:sma_400_firmware:10.2.1.2-24sv:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:sonicwall:sma_400:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:sonicwall:sma_500v_firmware:10.2.0.8-37sv:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:sonicwall:sma_500v_firmware:10.2.1.1-19sv:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:sonicwall:sma_500v_firmware:10.2.1.2-24sv:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:sonicwall:sma_500v:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:P/I:P/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • PARTIAL
  • Base Score
  • 7.5
  • Severity
  • HIGH
  • Exploitability Score
  • 10
  • Impact Score
  • 6.4
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 9.8
  • Base Severity
  • CRITICAL
  • Exploitability Score
  • 3.9
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026 Vendor Advisory
https://www.rapid7.com/blog/post/2022/01/11/cve-2021-20038-42-sonicwall-sma-100-multiple-vulnerabilities-fixed-2/
https://github.com/jbaines-r7/badblood
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-20038
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20038
History
Created Old Value New Value Data Type Notes
2022-05-08 06:20:36 Added to TrackCVE
2022-12-06 03:16:14 2021-12-08T10:15Z 2021-12-08T10:15:07 CVE Published Date updated
2022-12-06 03:16:14 2022-05-13T14:54:32 CVE Modified Date updated
2022-12-06 03:16:14 Analyzed Vulnerability Status updated