VMware ESXi servers vulnerable to a heap-overflow defect in OpenSLP are being actively targeted.
Successful infections result in systems infected with ESXiArgs ransomware.
The flaw is tracked under CVE-2021-21974.
CERT-FR recalls that the CVE-2021-21974 vulnerability affects the following systems:
ESXi 7.x versions earlier than ESXi70U1c-17325551
ESXi versions 6.7.x earlier than ESXi670-202102401-SG
ESXi versions 6.5.x earlier than ESXi650-202102101-SG
CERT-FR recommends applying without delay the workaround, which consists of disabling the SLP service on ESXi hypervisors that have not been updated.
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