CISA KEV · Known exploitedCritical

CVE-2019-5544

VMware VMware ESXi and Horizon DaaS

OpenSLP as used in ESXi and the Horizon DaaS appliances has a heap overwrite issue. VMware has evaluated the severity of this issue to be in the Critical severity range with a maximum CVSSv3 base score of 9.8.

CVSS: 9.8
EPSS: 96.8%
CISA KEV: Listed
Published: 2019.12.07

PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV

Exploit probability96.8%

Technical severityCVSS 9.8

Vulnerability overview

Affected product and versions

Product: VMware VMware ESXi and Horizon DaaS
Affected versions: ESXi 6.7 prior to patch release ESXi670-201912001, ESXi 6.5 prior to patch release ESXi650-201912001, ESXi 6.0 prior to patch release ESXi600-201912001 and Horizon DaaS 8.x prior to BZ-2467224-Disable_SLPD_service_permanently_801_Hotfix., >= 8.0.0 < 9.0.0.0, 6.0, 6.5, 6.7, 7.0, 6.0 s390x, 7.0 s390x, 7.7 s390x, 6.0 ppc64, 7.0 ppc64, 7.7 ppc64, 7.0 ppc64le, 7.7 ppc64le, 7.7, <= 2.0.0, 30, 31
Fixed versions: 9.0.0.0

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

CISA required action

Apply updates per vendor instructions.

Due date: 2022.05.03

1
Identify
Confirm that VMware VMware ESXi and Horizon DaaS and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-787
KEV added: 2021.11.03
Ransomware use: 확인됨