CISA warns of critical ManageEngine RCE bug used in attacks

The Cybersecurity and Infrastructure Security Agency has added a critical severity Java deserialization vulnerability affecting multiple Zoho ManageEngine products to its catalog of bugs exploited in the wild.

“The exploit POC for the above vulnerability is available in public,” ManageEngine warned customers in July when it issued security patches to address this issue.

After being added to CISA’s Known Exploited Vulnerabilities catalog, all Federal Civilian Executive Branch Agencies agencies now must patch their systems against this bug exploited in the wild according to a binding operational directive issued in November.

Even though BOD 22-01 applies to U.S. FCEB agencies only, the U.S. cybersecurity agency also strongly urged all organizations from private and public sectors worldwide to prioritize patching this bug.

Between August and October 2021, ManageEngine servers have also been attacked by nation-state hackers using tactics and tooling similar to those deployed in attacks by the Chinese-linked APT27 hacking group.

Following these campaigns, the FBI and CISA issued two joint advisories warning of APT actors exploiting ManageEngine flaws to drop web shells on the networks of critical infrastructure orgs, including healthcare, electronics, financial services, and IT consulting industries.

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