CVE-2019-5544 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2021-11-03
A heap-based buffer overflow vulnerability in the OpenSLP service, as used in VMware ESXi and Horizon DaaS, allows a remote attacker with network access to port 427 to overwrite the heap. This can lead to remote code execution on the affected host.
Yes. CVE-2019-5544 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2019-5544?
Critical severity, with a CVSS score of 9.8, published 3 November 2021.
Which products and versions are affected?
VMware ESXi; VMware Horizon Desktop as a Service (DaaS) appliances; OpenSLP OpenSLP.
Is there a fix for CVE-2019-5544?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2019-5544 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2019-5544?
Check whether you run VMware Horizon Daas or Vmware Esxi. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Affected products
VMware ESXi
VMware Horizon Desktop as a Service (DaaS) appliances
OpenSLP OpenSLP
Timeline
2019-12-10: disclosed: Initial disclosure via VMware advisory VMSA-2019-0022 and mailing lists.
2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog.