Improper Neutralization of HTTP Headers for Scripting Syntax in SonicOS - CVE-2021-20031
Published: October 12, 2021 / Updated: November 25, 2021
Vulnerability identifier: #VU57238
CSH Severity: Low
CVSS v4: 5.1 [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]
CVE-ID: CVE-2021-20031
CWE-ID: CWE-644
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
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.
Affected software
SonicOS
How to mitigate CVE-2021-20031
Install updates from vendor's website.
SonicOS - addressed in versions 6.5.1.13-1n, 6.5.4.v_21s-1288, 6.5.4.8-89n, 7.0.1-R1456, 7.0.1-5018-R1715, 7.0.1-5023-1349