Sophos Web Appliance vulnerability exploited in the wild (CVE-2023-1671)

CISA has added three vulnerabilities to its Known Exploited Vulnerabilities catalog, among them a critical vulnerability in Sophos Web Appliance that has been patched by the company in April 2023.

CVE-2023-1671 is a pre-auth command injection vulnerability in the warn-proceed handler of Sophos Web Appliance that allows attackers to execute arbitrary code.

Sophos Web Appliance is a web gateway appliance that functions as a web proxy and scans potentially harmful content for numerous forms of malware.

The vulnerability was disclosed in early April by an external security researcher through the Sophos bug bounty program.

At the time, the company pushed out the update with the fix to all Sophos Web Appliance customers who haven’t switched off the “Automatic update” setting.

The company also made sure to stress that Sophos Web Appliance would be reaching end of life on July 20, 2023, and would then stop receiving security or software updates.

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