CVE-2021-21974

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Summary

CVECVE-2021-21974
StatePUBLISHED
Assignervmware
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-02-24 17:15:16 UTC
Updated2026-06-02 21:16:24 UTC
DescriptionOpenSLP 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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-787 | OpenSLP heap-overflow vulnerability | CWE-787 CWE-787 Out-of-bounds Write

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary8.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1ADPDECLARED8.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary8.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
2.0[email protected]Primary5.8AV:A/AC:L/Au:N/C:P/I:P/A:P

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 Breakdown

Access Vector
Adjacent
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial

AV:A/AC:L/Au:N/C:P/I:P/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Vmware Cloud Foundation All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na VMware ESXi affected 7.0 before ESXi70U1c-17325551 Not specified
CNA Na VMware ESXi affected 6.7 before ESXi670-202102401-SG Not specified
CNA Na VMware ESXi affected 6.5 before ESXi650-202102101-SG Not specified
CNA Na VMware Cloud Foundation affected 4.x before 4.2 and 3.x Not specified

References

ReferenceSourceLinkTags
VMSA-2021-0002 af854a3a-2127-422b-91ae-364da2661108 www.vmware.com Vendor Advisory
VMware ESXi OpenSLP Heap Overflow ≈ Packet Storm af854a3a-2127-422b-91ae-364da2661108 packetstormsecurity.com Exploit, Third Party Advisory, VDB Entry
ZDI-21-250 | Zero Day Initiative af854a3a-2127-422b-91ae-364da2661108 www.zerodayinitiative.com Third Party Advisory, VDB Entry
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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