CVE-2021-21974

Description

OpenSLP as used in ESXi (7.0 before ESXi70U1c-17325551, 6.7 before ESXi670-202102401-SG, 6.5 before ESXi650-202102101-SG) has a heap-overflow vulnerability. A malicious actor residing within the same network segment as ESXi who has access to port 427 may be able to trigger the heap-overflow issue in OpenSLP service resulting in remote code execution.

References

https://blogs.blackberry.com/en/2023/02/esxiargs-ransomware-knocking-out-unpatched-vmware-esxi-linux-servers-worldwide

https://www.tenable.com/blog/cve-2021-21972-vmware-vcenter-server-remote-code-execution-vulnerability

https://www.zerodayinitiative.com/advisories/ZDI-21-250/

https://www.vmware.com/security/advisories/VMSA-2021-0002.html

http://packetstormsecurity.com/files/162957/VMware-ESXi-OpenSLP-Heap-Overflow.html

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3