McAfee Security Bulletin - Web Gateway update fixes a Privilege escalation vulnerability (CVE-2021-23885)
Security Bulletins ID:
SB10349
Last Modified: 2/16/2021
Last Modified: 2/16/2021
McAfee Security Bulletin - Web Gateway update fixes a Privilege escalation vulnerability (CVE-2021-23885)
Security Bulletins ID:
SB10349
Last Modified: 2/16/2021 SummaryFirst Published: February 16, 2021
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: Vulnerability Description This exploit requires the attacker to gain authenticated access to the MWG User Interface. McAfee recommends that access to the User Interface is restricted to trusted networks and that the number of people authorized to log on is limited. This issue results in commands being executed as root on the MWG appliance. McAfee is not aware of this issue being exploited in the field. CVE-2021-23885 Privilege escalation vulnerability in McAfee Web Gateway (MWG) prior to 9.2.8 allows an authenticated user to gain elevated privileges through the User Interface and execute commands on the appliance via incorrect improper neutralization of user input in the troubleshooting page. https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-23885 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23885 Remediation To remediate this issue:
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 Appliances: Use the following instructions for Appliance-based products:
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. What are the CVSS scoring metrics? CVE-2021-23885: Privilege escalation vulnerability in MWG
NOTE: The below CVSS version 3.1 vector was used to generate this score. https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C&version=3.1 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:
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. Affected ProductsGlossary of Technical Terms |
|