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Several Code Execution Vulnerabilities Patched in Sophos Firewall

Sophos has informed customers that Sophos Firewall version 19.5, whose general availability was announced in mid-November, patches several vulnerabilities, including ones that can lead to arbitrary code execution.

Sophos has informed customers that Sophos Firewall version 19.5, whose general availability was announced in mid-November, patches several vulnerabilities, including ones that can lead to arbitrary code execution.

In addition to resiliency improvements and a performance boost, the latest Sophos Firewall version brings patches for seven vulnerabilities.

According to a security advisory released on December 1, one of the vulnerabilities patched in version 19.5 is CVE-2022-3236, which has a ‘critical’ severity rating.

However, this flaw is not new. The cybersecurity firm first informed customers about its existence in September, when it warned that CVE-2022-3236 had been exploited in attacks aimed at a small set of organizations, mainly located in South Asia.

Three of the vulnerabilities patched in Sophos Firewall 19.5 have a ‘high’ severity rating, including CVE-2022-3226, an OS command injection issue that can be exploited by an attacker with admin privileges to execute code via SSL VPN configuration uploads.

CVE-2022-3713 allows an adjacent attacker to execute code in the Wi-Fi controller. The third high-severity issue, CVE-2022-3696, allows a hacker with admin privileges to execute malicious code in the web-based administrative interface.

The remaining three vulnerabilities have medium or low severity. They include a stored XSS issue that allows privilege escalation and two SQL injection vulnerabilities that expose non-sensitive configuration database contents.

Some of these security holes were discovered internally by Sophos, while others were reported by external researchers through the company’s bug bounty program.

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It’s not uncommon for threat actors to exploit vulnerabilities in Sophos products, and they have plenty of targets to choose from considering that there are many internet-exposed appliances out there.

At least some of the attacks targeting Sophos products have been linked to Chinese threat actors.

Related: Malware Delivered to Sophos Firewalls via Zero-Day Vulnerability

Related: Meta Disrupted Two Cyberespionage Operations in South Asia

Related: Details Disclosed for Critical Vulnerability in Sophos Appliances

Written By

Eduard Kovacs (@EduardKovacs) is a managing editor at SecurityWeek. He worked as a high school IT teacher for two years before starting a career in journalism as Softpedia’s security news reporter. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering.

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