CVE-2021-20031

Description

A Host Header Redirection vulnerability in SonicOS potentially allows a remote attacker to redirect firewall management users to arbitrary web domains.

Affected products

Vendor	Product	Affected	Fixed
SonicWall	SonicOS	7.0.1-R1262 and earlier, 7.0.1-R1283 and earlier, 7.0.1-R579 and earlier, 6.5.4.7 and earlier, 6.5.1.12 and earlier, 6.0.5.3-94o and earlier, 6.5.4.4-44V-21-987 and earlier, 5.9.1.13 and earlier	—

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

Exploit-DB 1

Sonicwall SonicOS 7.0 - Host Header Injection EDB-50414 · webapps · Oct 13, 2021

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

SonicWall SonicOS 7.0 - Open Redirect http/cves/2021/CVE-2021-20031.yaml

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.

A Host Header Redirection vulnerability in SonicOS potentially allows a remote attacker to redirect firewall management users to arbitrary …