Remote code execution in Sophos Firewall

1) Code Injection

EUVDB-ID: #VU67624

Risk: Critical

CVSSv3.1: 9.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2022-3236

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation in the User Portal and Webadmin interfaces of Sophos Firewall. A remote non-authenticated attacker can send a specially crafted request and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note, the vulnerability is being actively exploited in the wild.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Sophos Firewall: 17.0.0 - 19.0.1

CPE2.3

• cpe:2.3:h:sophos:xg_firewall:19.0.1:*:*:*:*:*:*:*
• cpe:2.3:h:sophos:xg_firewall:18.5.4:*:*:*:*:*:*:*
• cpe:2.3:h:sophos:xg_firewall:18.0.6:*:*:*:*:*:*:*
• cpe:2.3:h:sophos:xg_firewall:17.5.17:*:*:*:*:*:*:*
• cpe:2.3:h:sophos:xg_firewall:17.0.9:*:*:*:*:*:*:*
• cpe:2.3:h:sophos:xg_firewall:17.1:*:*:*:*:*:*:*

External links

http://www.sophos.com/en-us/security-advisories/sophos-sa-20220923-sfos-rce

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?

Yes. This vulnerability is being exploited in the wild.