CISA: Chinese State Hackers Are Exploiting F5, Citrix, Pulse Secure, and Exchange Bugs

The Cybersecurity and Infrastructure Security Agency (CISA) has published a security advisory today warning of a wave of attacks carried out by hacking groups affiliated with China’s Ministry of State Security (MSS). From a report: CISA says that over the past year, Chinese hackers have scanned US government networks for the presence of popular networking devices and then used exploits for recently disclosed vulnerabilities to gain a foothold on sensitive networks. The list of targeted devices includes F5 Big-IP load balancers, Citrix and Pulse Secure VPN appliances, and Microsoft Exchange email servers. For each of these devices, major vulnerabilities have been publicly disclosed over the past 12 months, such as CVE-2020-5902, CVE-2019-19781, CVE-2019-11510, and CVE-2020-0688, respectively. According to a table summarizing Chinese activity targeting these devices published by CISA today, some attacks have been successful and enabled Chinese hackers to gain a foothold on federal networks.