Zero-day vulnerability in Sophos Firewall

SQL injection
CVE-2020-12271

The vulnerability exploitation was detected on April 22, 2020. Malware dubbed Asnarök used SQL injection vulnerability to compromise the affected devices and steal users' credentials.

Known malware:

Asnarök

Vulnerability details

Advisory: SB2020042601 - SQL injection in Sophos XG Firewall/SFOS

Vulnerable component: Sophos Firewall

CVE-ID: CVE-2020-12271

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Description:

The vulnerability allows a remote attacker to execute arbitrary SQL queries in database.

The vulnerability exists due to insufficient sanitization of user-supplied data passed to the User Portal or Admin interfaces. A remote non-authenticated attacker can send a specially crafted request to the affected application and execute arbitrary SQL commands within the application database.

Successful exploitation of this vulnerability may allow a remote attacker to read, delete, modify data in database and gain complete control over the affected application.

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

External links:

https://community.sophos.com/kb/en-us/135412

https://news.sophos.com/en-us/2020/04/26/asnarok/



About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.