Sophos Web Appliance Command Injection Vulnerability
A pre-auth command injection vulnerability in the warn-proceed handler of Sophos Web Appliance older than version 4.3.10.4 allows execution of arbitrary code.
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)16 Nov 2023
- Exploited in EUVD (ENISA)16 Nov 2023
- Used by ransomwareno
- EPSS above 10 %100.00%
- No account, over the networkyes
What to do
Fix
Apply the vendor’s fix as soon as it is available.
CISA guidance: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
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 <4.3.10.4
Open source packages OSV
Affected libraries according to OSV, with fixed versions.
Timeline
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Published
-
Exploitation reported (ENISA)
-
Added to the KEV catalog
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CISA remediation due date
-
EPSS peak: 100.00%
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-2022-3236Sophos Firewall Code Injection Vulnerability9.3 · Background exploitation
- CVE-2022-1040Sophos Firewall Authentication Bypass 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