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 Subscribe |
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
CVSSv3.1: 3.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C]
CVE-ID: CVE-2021-20031
CWE-ID:
CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax
Exploit availability: Yes
DescriptionThe 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.
MitigationInstall updates from vendor's website.
Vulnerable software versionsSonicOS: 5.9 - 7.0.1-R1283
External linkshttp://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.
