CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS
Percentile
88.6%
SonicWall SonicOS 7.0 contains an open redirect vulnerability. The values of the Host headers are implicitly set as trusted. An attacker can spoof a particular host header, allowing the attacker to render arbitrary links, obtain sensitive information, modify data, execute unauthorized operations. and/or possibly redirect a user to a malicious site.
id: CVE-2021-20031
info:
name: SonicWall SonicOS 7.0 - Open Redirect
author: gy741
severity: medium
description: SonicWall SonicOS 7.0 contains an open redirect vulnerability. The values of the Host headers are implicitly set as trusted. An attacker can spoof a particular host header, allowing the attacker to render arbitrary links, obtain sensitive information, modify data, execute unauthorized operations. and/or possibly redirect a user to a malicious site.
remediation: |
Apply the latest security patch or update provided by SonicWall to mitigate the vulnerability.
reference:
- https://www.exploit-db.com/exploits/50414
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0019
- http://packetstormsecurity.com/files/164502/Sonicwall-SonicOS-7.0-Host-Header-Injection.html
- https://nvd.nist.gov/vuln/detail/CVE-2021-20031
- https://github.com/ARPSyndicate/cvemon
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
cvss-score: 6.1
cve-id: CVE-2021-20031
cwe-id: CWE-601
epss-score: 0.01452
epss-percentile: 0.86646
cpe: cpe:2.3:h:sonicwall:nsa_2650:-:*:*:*:*:*:*:*
metadata:
max-request: 1
vendor: sonicwall
product: nsa_2650
google-query: inurl:"auth.html" intitle:"SonicWall"
tags: cve,cve2021,sonicwall,redirect,edb,packetstorm
http:
- raw:
- |
GET / HTTP/1.1
Host: {{randstr}}.tld
matchers-condition: and
matchers:
- type: word
part: body
words:
- 'https://{{randstr}}.tld/auth.html'
- 'Please be patient as you are being re-directed'
condition: and
- type: status
status:
- 200
# digest: 4a0a00473045022059f740a31b60ed89fa96f917d460c88ee8f530001b4a7f379d899dc654d4e1e002210091c3f5cd2ea67e6382a8ed4ee86abb86ff080cb39045dc5cb218b105ba8d67b6:922c64590222798bb761d5b6d8e72950
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS
Percentile
88.6%