==================================================================== CERT-Renater Note d'Information No. 2019/VULN201 _____________________________________________________________________ DATE : 10/07/2019 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Systems running VMware ESXi. ===================================================================== https://www.vmware.com/security/advisories/VMSA-2019-0011.html _____________________________________________________________________ Advisory ID VMSA-2019-0011 Advisory Severity Moderate CVSSv3 Range 5.3 Synopsis ESXi patches address partial denial of service vulnerability in hostd process (CVE-2019-5528) Issue Date 2019-07-09 Updated On 2019-07-09 (Initial Advisory) CVE(s) CVE-2019-5528 1. Impacted Products ESXi 2. Introduction A partial denial of service vulnerability in ESXi was reported to VMware Security Response. Patches and workarounds are currently available to remediate or workaround this vulnerability. 3. Partial denial of service vulnerability in ESXi hostd process (CVE-2019-5528) Description: Multiple failed login attempts to ESXi may cause the hostd service to become unresponsive resulting in a partial denial of service for management functionality. VMware has evaluated the severity of this issue to be in the Moderate severity range with a maximum CVSSv3 base score of 5.3. Known Attack Vectors: A malicious actor with network access to an ESXi host could create a partial denial of service condition in management functionality. Successful exploitation of this issue may cause hostd to become unresponsive resulting in conditions such as an ESXi host disconnecting from vCenter. Resolution: To remediate this vulnerability, apply the patches listed in the 'Fixed Version' column of the 'Resolution Matrix' found below. Workarounds: Workarounds are available for this issue, follow the instructions in the documents linked in the 'Workarounds' section found below. Additional Documentations: None. Acknowledgements: None. Notes: If hostd becomes unresponsive due to CVE-2019-5528 the condition can be cleared by restarting the hostd service, it is not necessary to reboot the ESXi host. Vulnerability scanners have been reported to trigger this vulnerability via multiple failed login attempts to ESXi. Response Matrix: Product Version Running On CVE Identifier CVSSV3 Severity Fixed Version Workarounds Additional Documents ESXi 6.7 Any CVE-2019-5528 5.3 Moderate Patch Pending kb67920 None ESXi 6.5 Any CVE-2019-5528 5.3 Moderate ESXi650-201907201-UG kb67920 None ESXi 6.0 Any CVE-2019-5528 N/A N/A Unaffected N/A N/A 4. References Mitre CVE Dictionary Links: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-5528 Fixed Version(s) and Release Notes: ESXi650-201907201-UG: Downloads: https://my.vmware.com/group/vmware/patch Documentation: https://docs.vmware.com/en/VMware-vSphere/6.5/rn/vsphere-esxi-65u3-release-notes.html Workarounds: https://kb.vmware.com/s/article/67920 5. Change log 2019-07-09: VMSA-2019-0011 Initial security advisory detailing remediations and workarounds available for ESXi. 6. Contact E-mail list for product security notifications and announcements: https://lists.vmware.com/cgi-bin/mailman/listinfo/security-announce This Security Advisory is posted to the following lists: security-announce@lists.vmware.com bugtraq@securityfocus.com fulldisclosure@seclists.org E-mail: security@vmware.com PGP key at: https://kb.vmware.com/kb/1055 VMware Security Advisories https://www.vmware.com/security/advisories VMware Security Response Policy https://www.vmware.com/support/policies/security_response.html VMware Lifecycle Support Phases https://www.vmware.com/support/policies/lifecycle.html VMware Security & Compliance Blog https://blogs.vmware.com/security Twitter https://twitter.com/VMwareSRC Copyright 2019 VMware Inc. All rights reserved. ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 23/25 Rue Daviel | fax : 01-53-94-20-41 + + 75013 Paris | email:cert@support.renater.fr + =========================================================