CVE-2021-21974
HIGH severity · CVSS 8.8 · Out-of-bounds write
8.8CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorAdjacent
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)56%
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://www.vmware.com/security/advisories/VMSA-2021-0002.htmlAdvisory
- https://www.vmware.com/security/advisories/VMSA-2021-0002.htmlAdvisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-250/Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-250/Advisory
- http://packetstormsecurity.com/files/162957/VMware-ESXi-OpenSLP-Heap-Overflow.htmlAdvisory
- http://packetstormsecurity.com/files/162957/VMware-ESXi-OpenSLP-Heap-Overflow.htmlAdvisory