McAfee Security Bulletin - Data Loss Prevention Endpoint for Windows update fixes two vulnerabilities (CVE-2019-3621 and CVE-2019-3622)
Security Bulletins ID:
SB10290
Last Modified: 2022-03-11 15:49:13 Etc/GMT
Last Modified: 2022-03-11 15:49:13 Etc/GMT
Summary
First Published: July 23, 2019
Recent updates to this article
Date | Update |
August 11, 2020 | Updated that the fix included in 11.3.0 was erroneously not included in all subsequent 11.3.x releases. McAfee recommends that all customers on 11.3.x update to 11.3.29.6. |
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Impact of Vulnerability: | Files or Directories Accessible to External Parties (CWE-552) Authentication Bypass (CWE-592) |
CVE ID: | CVE-2019-3621 CVE-2019-3622 |
Severity Rating: | CVE-2019-3621: Medium CVE-2019-3622: High |
CVSS v3 Base/Temporal Scores: | CVE-2019-3621: 6.8 / 6.1 CVE-2019-3622: 7.2 / 6.5 |
Recommendations: | Install or update to:
|
Security Bulletin Replacement: | None |
Affected Software: | DLP Endpoint for Windows 11.2.x and earlier |
Location of updated software: | https://www.mcafee.com/us/downloads/downloads.aspx |
Article contents:
- Vulnerability Description
- Remediation
- Acknowledgments
- Frequently Asked Questions (FAQs)
- Resources
- Disclaimer
There are two vulnerabilities in the DLP Endpoint for Windows Agent addressed in these releases.
- CVE-2019-3621 addresses an issue where it was possible to bypass the Windows lock screen. With certain DLP Endpoint configuration options, and when one or more DLP Endpoint processes are killed immediately before the screen is locked or while the screen is locked, an attacker with physical access to the machine can bypass the lock screen by inserting a USB drive into the machine. This would result in a notification window being displayed above the lock screen, through which the attacker could gain access to the user's session.
- CVE-2019-3622 addresses an issue where the permissions on the DLP Endpoint log directory were incorrectly set, allowing privileged users to redirect the log files to arbitrary locations. The content of the redirected log files is unchanged.
- CVE-2019-3621
Authentication protection bypass vulnerability in McAfee Data Loss Prevention Endpoint (DLP Endpoint) for Windows 11.x prior to 11.3.0 allows a physical local user to bypass the Windows lock screen via DLP Endpoint processes being killed just prior to the screen being locked or when the screen is locked. The attacker requires physical access to the machine.
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-3621
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3621
- CVE-2019-3622
Files or directories accessible to external parties in McAfee Data Loss Prevention Endpoint (DLP Endpoint) for Windows 11.x prior to 11.3.0 allow an authenticated user to redirect DLP Endpoint log files to arbitrary locations via incorrect access control applied to the DLP Endpoint log folder allowing privileged users to create symbolic links.
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-3622
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3622
To remediate this issue upgrade to one of these versions:
- For DLP Endpoint 11.2.x or earlier, update to 11.3.29.6*.
NOTE: DLP Endpoint 11.2.x became End of Life on July 23, 2019.
- For DLP Endpoint 11.1.x, upgrade to 11.3.29.6 or update to 11.1.200.
Product | Versions | Type | File Name | Release Date |
DLP Endpoint for Windows | 11.3.29.6 | Update | HDLP_Agent_11_3_29_6.zip | August 11, 2020 |
DLP Endpoint for Windows | 11.1.200 | Update | HDLP_Agent_11_1_200_37.zip | July 23, 2019 |
* NOTE: The fix included in 11.3.0 was erroneously not included in all subsequent 11.3.x releases. McAfee recommends that all customers on 11.3.x update to 11.3.29.6. The fix is included in all releases of 11.4.0 and later.
Download and Installation Instructions
See KB56057 for instructions to download McAfee products, documentation, updates, and hotfixes. See the Release Notes and the Installation Guide, which you can download from the Documentation tab, for instructions to install these updates.
Acknowledgments
McAfee credits the following for responsibly reporting these issues to McAfee:
- CVE-2019-3621 - Lockheed Martin Red Team
- CVE-2019-3622 - Jacob Palaczynski and the ING Tech Poland Team who independently reported this issue
How do I know if my McAfee product is vulnerable or not?
For Endpoint products:
Use the following instructions for endpoint or client-based products:
- Right-click the McAfee tray shield icon on the Windows taskbar.
- Select Open Console.
- In the console, select Action Menu.
- In the Action Menu, select Product Details. The product version displays.
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-2019-3621: DLP Endpoint Windows lock screen bypass with physical access
Base Score 6.8 Attack Vector (AV) Physical (P) Attack Complexity (AC) High (H) Privileges Required (PR) High (H) User Interaction (UI) Required (R) Scope (S) Changed (C) Confidentiality (C) High (H) Integrity (I) High (H) Availability (A) High (H) Temporal Score (Overall) 6.1 Exploitability (E) Proof-of-Concept (P) Remediation Level (RL) Official Fix (O) Report Confidence (RC) Confirmed (C)
NOTE: The below CVSS version 3.0 vector was used to generate this score.
https://nvd.nist.gov/cvss/v3-calculator?vector=AV:P/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C
- CVE-2019-3622: DLP Endpoint log file redirection to arbitrary locations
Base Score 7.2 Attack Vector (AV) Local (L) Attack Complexity (AC) High (H) Privileges Required (PR) High (H) User Interaction (UI) Required (R) Scope (S) Changed (C) Confidentiality (C) High (H) Integrity (I) High (H) Availability (A) High (H) Temporal Score (Overall) 6.5 Exploitability (E) Proof-of-Concept (P) Remediation Level (RL) Official Fix (O) Report Confidence (RC) Confirmed (C)
NOTE: The below CVSS version 3.0 vector was used to generate this score.
https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C
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