Sophos Firewall Authentication Bypass Vulnerability
An authentication bypass vulnerability in the User Portal and Webadmin allows a remote attacker to execute code in Sophos Firewall version v18.5 MR3 and older.
Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.
Exploitation probability EPSS · FIRST
Exploitation signals 4 / 5
- KEV catalog (CISA)31 Mar 2022
- Exploited in EUVD (ENISA)31 Mar 2022
- Used by ransomwareno
- EPSS above 10 %99.8%
- No account, over the networkyes
What to do
Fix
Apply the vendor’s fix as soon as it is available.
CISA guidance: Apply updates per vendor instructions.
Meanwhile
Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.
Manufacturers (CRA)
Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained
Affected products
- unspecified ≤18.5 MR3
Open source packages OSV
Affected libraries according to OSV, with fixed versions.
Timeline
-
Published
-
Exploitation reported (ENISA)
-
Added to the KEV catalog
-
CISA remediation due date
-
EPSS peak: 99.8%
References
Other exploited vulnerabilities from the same vendor
- CVE-2020-29574CyberoamOS (CROS) SQL Injection Vulnerability6.5 · Background exploitation
- CVE-2020-15069Sophos XG Firewall Buffer Overflow Vulnerability6.6 · Background exploitation
- CVE-2023-1671Sophos Web Appliance Command Injection Vulnerability9.3 · Background exploitation
- CVE-2022-3236Sophos Firewall Code Injection Vulnerability9.3 · Background exploitation
- CVE-2020-25223Sophos SG UTM Remote Code Execution Vulnerability9.2 · Background exploitation
- CVE-2020-12271Sophos SFOS SQL Injection Vulnerability8.3 · Background exploitation