CVE-2023-1671
Published: November 16, 2023
Official Description
Sophos Web Appliance contains a command injection vulnerability in the warn-proceed handler that allows for remote code execution.
CISA KEV Advisory
Sophos Web Appliance Command Injection Vulnerability
Sophos Web Appliance contains a command injection vulnerability in the warn-proceed handler that allows for remote code execution.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Risk Analysis
A command injection vulnerability in Sophos Web Appliance's warn-proceed handler allows for remote code execution. The high EPSS score of 0.94296 suggests a very high probability of exploitation, necessitating immediate attention.
This vulnerability is actively being exploited in the wild and is included in CISA's KEV catalog. It is remotely exploitable.
Consult Sophos advisories for the Web Appliance and apply all recommended patches or updates. Implement network segmentation to limit exposure of the appliance.
Technical Analysis
CVE-2023-1671 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2023-1671 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
All References (2)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-1671 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1