Barracuda ESG Zero-Day Vulnerability
TLP TLP TLP CLEAR Author David Deflache Summary In May 2023, Barracuda disclosed a zero-day vulnerability (CVE-2023-2868) exploited by UNC4841, a suspected Chinese espionage actor. UNC4841 targeted Barracuda Email Security Gateways (ESG) since October 2022, using malicious email attachments. They deployed code families (SALTWATER, SEASPY, SEASIDE) to infiltrate and maintain control, often disguising as legitimate…