Malicious hackers are exploiting a zero-day vulnerability in Versa Director, a software product used by many Internet and IT service providers. Researchers believe the activity is linked to Volt Typhoon, a Chinese cyber espionage group focused on infiltrating critical U.S. networks and laying the groundwork for the ability to disrupt communications between the United States and Asia during any future armed conflict with China.
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Versa Director systems are primarily used by Internet service providers (ISPs), as well as managed service providers (MSPs) that cater to the IT needs of many small to mid-sized businesses simultaneously. In a security advisory published Aug. 26, Versa urged customers to deploy a patch for the vulnerability (CVE-2024-39717), which the company said is fixed in Versa Director 22.1.4 or later.
Versa said the weakness allows attackers to upload a file of their choosing to vulnerable systems. The advisory placed much of the blame on Versa customers who “failed to implement system hardening and firewall guidelines…leaving a management port exposed on the internet that provided the threat actors with initial access.”
Versa’s advisory doesn’t say how it learned of the zero-day flaw, but its vulnerability listing at mitre.org acknowledges “there are reports of others based on backbone telemetry observations of a 3rd party provider, however these are unconfirmed to date.”
Those third-party reports came in late June 2024 from Michael Horka, senior lead information security engineer at Black Lotus Labs, the security research arm of Lumen Technologies, which operates one of the global Internet’s largest backbones.
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