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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.3286 Security Bulletin - Drive Encryption update fixes a Privilege Escalation vulnerability (CVE-2021-23893) (SB10361) 5 October 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: McAfee Drive Encryption Publisher: McAfee Operating System: Windows Impact/Access: Increased Privileges -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-23893 Original Bulletin: https://kc.mcafee.com/corporate/index?page=content&id=SB10361 - --------------------------BEGIN INCLUDED TEXT-------------------- Security Bulletins ID : SB10361 Last Modified : 9/30/2021 Summary First Published: September 30, 2021 +----------------+---------+--------------+----------------+--------+---------+ | | | | | |CVSS v3.1| |Product: |Impacted |CVE ID: |Impact of |Severity|Base/ | | |Versions:| |Vulnerabilities:|Ratings:|Temporal | | | | | | |Scores: | +----------------+---------+--------------+----------------+--------+---------+ | | | |CWE-269: | | | |McAfee Drive |Prior to |CVE-2021-23893|Improper |High |8.8 / 7.9| |Encryption (DE) |7.3.0 HF1| |Privilege | | | | | | |Management | | | +----------------+---------+--------------+----------------+--------+---------+ |Recommendations:|Install or update DE 7.3.0 HF1 | +----------------+------------------------------------------------------------+ |Security | | |Bulletin |None | |Replacement: | | +----------------+------------------------------------------------------------+ |Location of | | |updated |Product Downloads site | |software: | | +----------------+------------------------------------------------------------+ To receive email notification when this Security Bulletin is updated, click Subscribe on the right side of the page. You must be logged on to subscribe. Article contents: o Vulnerability Description o Remediation o Acknowledgments o Frequently Asked Questions (FAQs) o Resources o Disclaimer Vulnerability Description To exploit this vulnerability, an attacker would need to convince a user to download and execute malicious code. CVE-2021-23893 Privilege Escalation vulnerability in a Windows system driver of McAfee Drive Encryption (DE) prior to 7.3.0 could allow a local non-admin user to gain elevated system privileges via exploiting an unutilized memory buffer. NVD CVE-2021-23893 MITRE CVE-2021-23893 Remediation To remediate this issue, update to DE 7.3.0 HF1. Go to the Product Downloads site , and download the applicable product hotfix file: +-------+---------+------+------------------+ |Product|Version |Type |Release Date | +-------+---------+------+------------------+ |DE |7.3.0 HF1|Hotfix|September 30, 2021| +-------+---------+------+------------------+ Download and Installation Instructions For instructions to download McAfee Enterprise product updates and hotfixes, see: KB56057 - How to download Enterprise product updates and documentation . Review the Release Notes and the Installation Guide for instructions on how to install these updates. All documentation is available at our Product Documentation site . Acknowledgments McAfee Enterprise credits Balazs Bucsay (@xoreipeip), Principal Security Consultant from NCC Group for responsibly reporting this flaw. Frequently Asked Questions (FAQs) How do I know if my McAfee Enterprise product is vulnerable or not For endpoint products: Use the following instructions for endpoint or client-based products: 1. Right-click the McAfee tray shield icon on the Windows taskbar. 2. Select Open Console . 3. In the console, select Action Menu . 4. In the Action Menu, select Product Details . The product version displays. What is CVSS Common Vulnerability Scoring System (CVSS) is the result of the National Infrastructure Advisory Council's effort to standardize a system of assessing the criticality of a vulnerability. This system offers an unbiased criticality score between 0 and 10 that customers can use to judge how critical a vulnerability is and plan accordingly. For more information, visit the CVSS website . When calculating CVSS scores, McAfee Enterprise has adopted a philosophy that fosters consistency and repeatability. Our guiding principle for CVSS scoring is to score the exploit under consideration by itself. We consider only the immediate and direct impact of the exploit under consideration. We don't factor into a score any potential follow-on exploits that might be made possible by the successful exploitation of the issue being scored. What are the CVSS scoring metrics CVE-2021-23893: Privilege Escalation vulnerability in DE +------------------------+--------------------+ |Base Score |8.8 | +------------------------+--------------------+ |Attack Vector (AV) |Local (L) | +------------------------+--------------------+ |Attack Complexity (AC) |Low (L) | +------------------------+--------------------+ |Privileges Required (PR)|Low (L) | +------------------------+--------------------+ |User Interaction (UI) |None (N) | +------------------------+--------------------+ |Scope (S) |Changed (C) | +------------------------+--------------------+ |Confidentiality (C) |High (H) | +------------------------+--------------------+ |Integrity (I) |High (H) | +------------------------+--------------------+ |Availability (A) |High (H) | +------------------------+--------------------+ |Temporal Score (Overall)|7.9 | +------------------------+--------------------+ |Exploitability (E) |Proof-of-Concept (P)| +------------------------+--------------------+ |Remediation Level (RL) |Official Fix (O) | +------------------------+--------------------+ |Report Confidence (RC) |Confirmed (C) | +------------------------+--------------------+ NOTE: This CVSS version 3.1 vector was used to generate this score. Where can I find a list of all Security Bulletins All Security Bulletins are published on our external PSIRT website . To see Security Bulletins for McAfee Enterprise products on this website, click Enterprise Security Bulletins . Security Bulletins are retired (removed) once a product is both End of Sale and End of Support (End of Life). How do I report a product vulnerability to McAfee Enterprise If you have information about a security issue or vulnerability with a McAfee Enterprise product, go to the PSIRT website , click Report a Security Vulnerability , and follow the instructions. How does McAfee Enterprise respond to this and any other reported security flaws Our key priority is the security of our customers. If a vulnerability is found within any McAfee Enterprise software or services, we work closely with the relevant security software development team to ensure the rapid and effective development of a fix and communication plan. McAfee Enterprise only publishes Security Bulletins if they include something actionable such as a workaround, mitigation, version update, or hotfix. Otherwise, we would simply be informing the hacker community that our products are a target, putting our customers at greater risk. For products that are updated automatically, a non-actionable Security Bulletin might be published to acknowledge the discoverer. View our PSIRT policy on the PSIRT website by clicking About PSIRT . Resources To contact Technical Support, go to the Create a Service Request page and log on to the ServicePortal. o If you're a registered user, type your User ID and Password, and then click Log In . o If you aren't a registered user, click Register and complete the fields to have your password and instructions emailed to you. Disclaimer The information provided in this Security Bulletin is provided as is without warranty of any kind. McAfee Enterprise disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall McAfee Enterprise or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if McAfee Enterprise or its suppliers have been advised of the possibility of such damages. Some states don't allow the exclusion or limitation of liability for consequential or incidental damages so the preceding limitation may not apply. Any future product release dates mentioned in this Security Bulletin are intended to outline our general product direction, and they shouldn't be relied on in making a purchasing decision. The product release dates are for information purposes only, and may not be incorporated into any contract. The product release dates aren't a commitment, promise, or legal obligation to deliver any material, code, or functionality. The development, release, and timing of any features or functionality described for our products remains at our sole discretion and may be changed or canceled at any time - --------------------------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. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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