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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.0173 VMWare Tools for Windows vulnerability 16 January 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: VMWare Tools for Windows Publisher: VMWare Operating System: Windows Impact/Access: Increased Privileges -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2020-3941 Original Bulletin: https://www.vmware.com/security/advisories/VMSA-2020-0002.html - --------------------------BEGIN INCLUDED TEXT-------------------- +------------+----------------------------------------------------------------+ |Advisory ID |VMSA-2020-0002 | +------------+----------------------------------------------------------------+ |Advisory |Important | |Severity | | +------------+----------------------------------------------------------------+ |CVSSv3 Range|7.8 | +------------+----------------------------------------------------------------+ |Synopsis |VMware Tools workaround addresses a local privilege escalation | | |vulnerability (CVE-2020-3941) | +------------+----------------------------------------------------------------+ |Issue Date |2020-01-14 | +------------+----------------------------------------------------------------+ |Updated On |2020-01-14 (Initial Advisory) | +------------+----------------------------------------------------------------+ |CVE(s) |CVE-2020-3941 | +------------+----------------------------------------------------------------+ 1. Impacted Products o VMware Tools for Windows (VMware Tools) 2. Introduction A vulnerability in VMware Tools in functionality that was removed from VMware Tools 11.0.0 has been determined to affect VMware Tools for Windows version 10.x.y. Workarounds are available to address this vulnerability in affected VMware Tools versions. 3. VMware Tools workaround addresses a local privilege escalation vulnerability (CVE-2020-3941) Description: The repair operation of VMware Tools for Windows has a race condition. VMware has evaluated the severity of this issue to be in the Important severity range with a maximum CVSSv3 base score of 7.8. Known Attack Vectors: A malicious actor on the guest VM might exploit the race condition and escalate their privileges on a Windows VM. This issue affects VMware Tools for Windows version 10.x.y as the affected functionality is not present in VMware Tools 11. Resolution: To remediate CVE-2020-3941, update to VMware Tools version 11.0 or later. Workarounds: A workaround for CVE-2020-3941 has been documented in the VMware Knowledge Base article listed in the "Workarounds" column of the "Response Matrix" below. Additional Documentations: None. Acknowledgements: None. Response Matrix: +-------+-------+-------+-------------+------+---------+--------+-----------+-------------+ |Product|Version|Running|CVE |CVSSV3|Severity |Fixed |Workarounds|Additional | | | |On |Identifier | | |Version | |Documentation| +-------+-------+-------+-------------+------+---------+--------+-----------+-------------+ |VMware |11.x.y |Any |CVE-2020-3941|N/A |N/A |Not |N/A |N/A | |Tools | | | | | |affected| | | +-------+-------+-------+-------------+------+---------+--------+-----------+-------------+ | | | | | | |11.0.0 *| | | |VMware | | | | | |or | | | |Tools |10.x.y |Windows|CVE-2020-3941|7.8 |Important|11.0.1 |KB76654 |None | | | | | | | |or | | | | | | | | | |11.0.5 | | | +-------+-------+-------+-------------+------+---------+--------+-----------+-------------+ |VMware |10.x.y |Linux |CVE-2020-3941|N/A |N/A |Not |N/A |N/A | |Tools | | | | | |affected| | | +-------+-------+-------+-------------+------+---------+--------+-----------+-------------+ * In case you are using the native service discovery feature in vRealize Operations Manager 8.0, or using the vRealize Operations Service Discovery Management Pack with previous releases of vRealize Operations Manager (7.x or before) we recommend upgrading to VMware Tools 11.0.1 or 11.0.5. 4. References Fixed Version(s) and Release Notes: https://docs.vmware.com/en/VMware-Tools/11.0/rn/ VMware-Tools-1105-Release-Notes.html Workarounds: https://kb.vmware.com/s/article/76654 FIRST CVSSv3 Calculator: CVE-2020-3941 - https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/ PR:L/UI:N/S:U/C:H/I:H/A:H Mitre CVE Dictionary Links: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3941 5. Change log 2020-01-14 : VMSA-2020-0002 Initial security advisory in conjunction with the release of VMware Tools 11.0.5 on 2020-01-14 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 E-mail: security@vmware.com PGP key at: https://kb.vmware.com/kb/1055 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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