CVE-2019-5544
CRITICALCISA KEVEPSS 100th pctlDescription
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 v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
Very high risk: more likely to be exploited than 100% of all known CVEs.
VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Vulnerability
VMware ESXi and Horizon Desktop as a Service (DaaS) OpenSLP contains a heap-based buffer overflow vulnerability that allows an attacker with network access to port 427 to overwrite the heap of the OpenSLP service to perform remote code execution.
Apply updates per vendor instructions.
Remediation due: 2022-05-03
Associated with ransomware campaigns
References
- http://www.openwall.com/lists/oss-security/2019/12/10/2
- http://www.openwall.com/lists/oss-security/2019/12/11/2
- http://www.vmware.com/security/advisories/VMSA-2019-0022.html
- https://access.redhat.com/errata/RHSA-2019:4240
- https://access.redhat.com/errata/RHSA-2020:0199
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DA3LYAJ2NRKMOZLZOQNDJ5TNQRFMWGHF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZPXXJZLPLAQULBCJVI5NNWZ3PGWXGXWG/
- https://security.gentoo.org/glsa/202005-12
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-5544
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-30.