CVE-2023-1671: Sophos Web Appliance Command Injection Vulnerability

Vulnerability summary

CVE-2023-1671 is a critical (CVSS 9.8) Command Injection vulnerability in Sophos Web Appliance. It is known to be exploited: CISA lists it, first on 16-11-2023. EPSS estimates a 100.00% chance of exploitation in the next 30 days, higher than 99.9% of scored vulnerabilities. 2 public exploits are recorded.

Timeline

1. 04-04-2023
   PublishedVulnerability first disclosed.
2. 16-11-2023
   Added to CISA KEVSophos Web Appliance Command Injection Vulnerability
3. 07-12-2023
   CISA remediation dueApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
4. 21-10-2025
   Last modifiedVulnerability information updated.

Description

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.

• CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.