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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.0609 McAfee Security Bulletin - Status and updates for Linux sudo vulnerability 19 February 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: McAfee Web Gateway Publisher: McAfee Operating System: Network Appliance Impact/Access: Root Compromise -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-3156 Reference: ESB-2021.0408 ESB-2021.0313 ESB-2021.0287 Original Bulletin: https://kc.mcafee.com/corporate/index?page=content&id=SB10348 - --------------------------BEGIN INCLUDED TEXT-------------------- McAfee Security Bulletin - Status and updates for Linux sudo vulnerability (CVE-2021-3156) Security Bulletins ID : SB10348 Last Modified : 2/16/2021 Summary First Published: February 11, 2021 Recent updates to this article +-------------------+---------------------------------------------------------+ | Date | Update | +-------------------+---------------------------------------------------------+ | | Updated the "Vulnerable and Updated" section with MWG | | February 16, 2021 | 10.0.4, 9.2.8, and 8.2.17. | | | Updated the "Not Vulnerable" section with SIEM | | | Appliance Data Monitor (ADM). | +-------------------+---------------------------------------------------------+ 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. +-----------------------------------------------------------------------------+ | CVE Information: | +--------------------------+--------------------------------------------------+ | Impact of | Low - see the description section below | | Vulnerabilities: | | +---------------+----------+-------+------------------------+-----------------+ | | | CVSS | | | | CVE IDs | Severity | v3.1 | Affected Products | Impact of | | | Rating | Base | | Vulnerabilities | | | | Score | | | +---------------+----------+-------+------------------------+-----------------+ | | | | See the McAfee Product | CWE-269 - | | CVE-2021-3156 | High | 7.8 | Vulnerability Status | Privilege | | | | | table below | escalation | +---------------+----------+-------+------------------------+-----------------+ | Highest CVSS v3.1 Base | 7.8 | | Score: | | +--------------------------+--------------------------------------------------+ | Recommendations: | Deploy the fixes as they are made available. | +--------------------------+--------------------------------------------------+ | Security Bulletin | None | | Replacement: | | +--------------------------+--------------------------------------------------+ | Affected Models: | See the McAfee Product Vulnerability Status | | | table below for platform details. | +--------------------------+--------------------------------------------------+ | Location of updated | http://www.mcafee.com/us/downloads/ | | software: | downloads.aspx | +--------------------------+--------------------------------------------------+ Article contents: o Vulnerability Description o McAfee Product Vulnerability Status o Remediation o Frequently Asked Questions (FAQs) o Resources o Disclaimer Vulnerability Description This sudo vulnerability affects Linux-based appliances and virtual machines. McAfee products are listed in the table below with their current status. A detailed description of the vulnerability can be found on the Red Hat security bulletin - https://access.redhat.com/security/cve/CVE-2021-3156 . Some appliance products are listed as "Vulnerable and Not Exploitable - Update Planned". The reasoning for this status is: o A vulnerable version of the sudo rpm is installed as part of the McAfee appliance image. o The appliance is designed to be managed through the user interface, not the CLI. o The CLI is configured to have only one user allowed to log on. This user is typically used to access through SSH and then changed to the root user. As such the sudo vulnerability is unlikely to be exploitable. CVE-2021-3156 Sudo before 1.9.5p2 has a Heap-based Buffer Overflow, allowing privilege escalation to root via " sudoedit -s " and a command-line argument that ends with a single backslash character. https://nvd.nist.gov/vuln/detail/CVE-2021-3156 https://cve.mitre.org/cgi-bin/cvename.cginame=CVE-2021-3156 McAfee Product Vulnerability Status This Security Bulletin will be updated as additional information is available. +--------------------------------------------------------+ |Update Availability | +------------------------------------------------+-------+ |Product |Version| +------------------------------------------------+-------+ |Vulnerable and Updated | +------------------------------------------------+-------+ | |10.0.4 | |McAfee Web Gateway (MWG) |9.2.8 | | |8.2.17 | +------------------------------------------------+-------+ |Not Vulnerable | +------------------------------------------------+-------+ |Network Security Manager (NSM) Linux |All | +------------------------------------------------+-------+ |Network Security Platform (NSP) |All | +------------------------------------------------+-------+ |Network Threat Behavior Analysis (NTBA) |All | +------------------------------------------------+-------+ |SIEM Appliance Data Monitor (ADM) |All | +------------------------------------------------+-------+ |SIEM Enterprise Security Manager |All | +------------------------------------------------+-------+ |Vulnerable and Not Exploitable - Update Planned | +------------------------------------------------+-------+ |Advanced Threat Defense (ATD) |All | +------------------------------------------------+-------+ |Data Exchange Layer (DXL) Broker |All | +------------------------------------------------+-------+ |Data Loss Prevention (DLP) - Prevent and Monitor|All | +------------------------------------------------+-------+ |McAfee Active Response (MAR) Server |All | +------------------------------------------------+-------+ |Threat Intelligence Exchange (TIE) Server |All | +------------------------------------------------+-------+ For a description of each product, see: https://www.mcafee.com/enterprise/en-us /products/a-z.html . Remediation To remediate this issue, go to the Product Downloads site , and download the applicable product update/hotfix files: +-------+-------+------+-----------------+ |Product|Version|Type |Release Date | +-------+-------+------+-----------------+ | |10.0.4 | | | |MWG |9.2.8 |Update|February 15, 2021| | |8.2.17 | | | +-------+-------+------+-----------------+ Download and Installation Instructions For instructions to download McAfee 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 https://docs.mcafee.com . Frequently Asked Questions (FAQs) How do I know if my McAfee product is vulnerable or not For Endpoint Security on Windows: Use the following instructions for endpoint or client-based products: 1. Right-click the McAfee tray shield icon on the Windows taskbar. 2. Select McAfee Endpoint Security . 3. In the console, select Action Menu . 4. In the Action Menu, select About . The product version displays. For endpoint products and ENS on other platforms: 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. For ePO/server products: Use the following instructions for server-based products: o Check the version and build of ePO that is installed. For instructions, see KB52634 - How to determine what update is installed for ePO . o Create a query in ePO for the product version of the product installed within your organization. For Appliances: Use the following instructions for Appliance-based products: 1. Open the Administrator's User Interface (UI). 2. Click the About link. The product version displays. For DLP Endpoint ePO Extension: Use the following instructions: 1. Log on to the ePO server. 2. Click Menu , Data Protection , DLP Policy . 3. Inside the DLP console click Help , About . The product version displays. What is CVSS CVSS, or Common Vulnerability Scoring System, 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 at: https://www.first.org/cvss/ . When calculating CVSS scores, McAfee 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 do not factor into a score any potential follow-on exploits that might be made possible by the successful exploitation of the issue being scored. Where can I find a list of all Security Bulletins All Security Bulletins are published on our external PSIRT website at https:// www.mcafee.com/us/threat-center/product-security-bulletins.aspx . 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 If you have information about a security issue or vulnerability with a McAfee product, visit the McAfee PSIRT website for instructions at https:// www.mcafee.com/us/threat-center/product-security-bulletins.aspx . To report an issue, click Report a Security Vulnerability . How does McAfee 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 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 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 McAfee PSIRT website at https://www.mcafee.com/us/ threat-center/product-security-bulletins.aspx by clicking About PSIRT . Resources To contact Technical Support, log on to the ServicePortal and go to the Create a Service Request page at https://support.mcafee.com/ServicePortal/faces/ serviceRequests/createSR : o If you are a registered user, type your User ID and Password, and then click Log In . o If you are not a registered user, click Register and complete the required fields. Your password and logon instructions will be emailed to you. Disclaimer The information provided in this Security Bulletin is provided as is without warranty of any kind. McAfee disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall McAfee or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if McAfee or its suppliers have been advised of the possibility of such damages. Some states do not 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 should not 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 are not 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. 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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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