# CVE-2019-5544

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.

- Page: https://www.vulneraibility.com/cve/CVE-2019-5544
- CVSS: 9.8
- Known exploited: yes, in CISA KEV since 2021-11-03; CISA due date 2022-05-03; known ransomware use
- EPSS: 98.13% (percentile 99.9)
- Unvetted proof-of-concept code on GitHub: 2 GitHub proofs of concept · 1 Nuclei template (first 2020-12-01)
- CISA SSVC: exploitation active, automatable yes, technical impact total (assessed 2025-02-07)
- Weakness: CWE-787
- Published: 2019-12-06

## Affected versions

- ESXi and Horizon DaaS: affected 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.

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] http://www.vmware.com/security/advisories/VMSA-2019-0022.html
- [other] http://www.openwall.com/lists/oss-security/2019/12/10/2
- [other] http://www.openwall.com/lists/oss-security/2019/12/11/2
- [advisory] https://access.redhat.com/errata/RHSA-2019:4240
- [advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZPXXJZLPLAQULBCJVI5NNWZ3PGWXGXWG/
- [advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DA3LYAJ2NRKMOZLZOQNDJ5TNQRFMWGHF/
- [advisory] https://access.redhat.com/errata/RHSA-2020:0199
- [advisory] https://security.gentoo.org/glsa/202005-12
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-5544

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.