Spoofing attack in SonicWall SonicOS



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-20031
CWE-ID CWE-644
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 SonicOS
Operating systems & Components / Operating system

Vendor SonicWall

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Improper Neutralization of HTTP Headers for Scripting Syntax

EUVDB-ID: #VU57238

Risk: Low

CVSSv4.0: 2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2021-20031

CWE-ID: CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to perform a spoofing attack.

The vulnerability exists due to insufficient validation of user-supplied input when processing HTTP headers. A remote attacker can send a specially crafted HTTP response with arbitrary Host header value and redirect firewall management users to arbitrary web domains.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

SonicOS: 5.9 - 7.0.1-R1283

CPE2.3 External links

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0019


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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