McAfee Security Bulletin - Advanced Threat Defense update fixes a privilege escalation vulnerability (CVE-2020-7254)
Security Bulletins ID:
SB10311
Last Modified: 3/10/2020
Last Modified: 3/10/2020
Summary
First Published: March 10, 2020
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Article contents:
By default, there is no access to the command line for users and administrators.
CVE-2020-7254
Privilege Escalation vulnerability in the command line interface in McAfee Advanced Threat Defense (ATD) 4.x prior to 4.8.2 allows local users to execute arbitrary code via improper access controls on the sudo command.
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-7254
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-7254
Remediation
To remediate this issue, go to the Product Downloads site, and download the latest version. See the Frequently Asked Questions section for the path to upgrade from older versions to this version.
Download and Installation Instructions
See KB56057 for instructions on how to download McAfee products, documentation, updates, and hotfixes. Review the Release Notes and the Installation Guide, which you can download from the Documentation tab, for instructions on how to install these updates.
Migration
See the Migration Guide for instructions to get to a protected version.
IMPORTANT: When upgrading to the appropriate ATD version with the fix, you must use the migration package. Failure to use the correct migration package causes installation failures and requires a reimage of the appliance.
Acknowledgments
McAfee credits Jerome Nokin from NCIA for responsibly reporting CVE-2020-7254.
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:
ATD Update 4.8.2 is applicable to all ATD models - both physical and virtual.
Will a fix for CVE-2020-7254 be available for ATD versions earlier than 4.8.2?
Customers running ATD and virtual ATD versions 4.8.0 or earlier must upgrade to ATD Update 4.8.2 to obtain the fix for CVE-2020-7254. To remediate against all vulnerabilities listed in this Security Bulletin, it is recommended to upgrade to ATD 4.8.2
What are the steps needed to get to a protected version?
NOTES:
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: http://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-2020-7254 - Privilege escalation in Advanced Threat Defense
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:L/AC:H/PR:L/UI:N/S:C/C:L/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 http://www.mcafee.com/us/threat-center/product-security-bulletins.aspx > 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 http://www.mcafee.com/us/threat-center/product-security-bulletins.aspx > Report a Security Vulnerability.
How does McAfee respond to this and any other reported security flaws?
McAfee's key priority is the security of our customers. If a vulnerability is found within any of McAfee's 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 http://www.mcafee.com/us/threat-center/product-security-bulletins.aspx > 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:
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.
| Impact of Vulnerability: | Improper Privilege Management (CWE-269) Permissions, Privileges, and Access Control (CWE-264) |
| CVE ID: | CVE-2020-7254 |
| Severity Rating: | High |
| CVSS v3 Base/Temporal Scores: | 7.7 / 6.9 |
| Recommendations: | Update to Advanced Threat Defense (ATD) 4.8.2 |
| Security Bulletin Replacement: | None |
| Affected Software: | ATD 4.x prior to 4.8.2 |
| Location of updated software: | http://www.mcafee.com/us/downloads/downloads.aspx |
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
- Remediation
- Acknowledgments
- Frequently Asked Questions (FAQs)
- Resources
- Disclaimer
By default, there is no access to the command line for users and administrators.
CVE-2020-7254
Privilege Escalation vulnerability in the command line interface in McAfee Advanced Threat Defense (ATD) 4.x prior to 4.8.2 allows local users to execute arbitrary code via improper access controls on the sudo command.
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-7254
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-7254
Remediation
To remediate this issue, go to the Product Downloads site, and download the latest version. See the Frequently Asked Questions section for the path to upgrade from older versions to this version.
| Product | Version | Type | Release Date |
| ATD | 4.8.2 | Update | March 10, 2020 |
Download and Installation Instructions
See KB56057 for instructions on how to download McAfee products, documentation, updates, and hotfixes. Review the Release Notes and the Installation Guide, which you can download from the Documentation tab, for instructions on how to install these updates.
Migration
See the Migration Guide for instructions to get to a protected version.
IMPORTANT: When upgrading to the appropriate ATD version with the fix, you must use the migration package. Failure to use the correct migration package causes installation failures and requires a reimage of the appliance.
Acknowledgments
McAfee credits Jerome Nokin from NCIA for responsibly reporting CVE-2020-7254.
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:
- Open the Administrator's User Interface (UI).
- Click the About link. The product version displays.
ATD Update 4.8.2 is applicable to all ATD models - both physical and virtual.
Will a fix for CVE-2020-7254 be available for ATD versions earlier than 4.8.2?
Customers running ATD and virtual ATD versions 4.8.0 or earlier must upgrade to ATD Update 4.8.2 to obtain the fix for CVE-2020-7254. To remediate against all vulnerabilities listed in this Security Bulletin, it is recommended to upgrade to ATD 4.8.2
What are the steps needed to get to a protected version?
| Starting Version | Total Number of Steps to Upgrade to Fixed Version |
Upgrade Path |
|---|---|---|
| 3.6.2 | 5 | 3.6.2 > 3.8.0 > 4.2.0 > 4.4.0 > 4.8.0 |
| 3.8.x | 4 | 3.8.x > 4.2.0 > 4.4.0 > 4.8.0 |
| 4.0.x | 3 | 4.0.x > 4.4.0 > 4.8.0 |
| 4.2.x | 3 | 4.2.0 > 4.4.0 > 4.8.0 |
| 4.4.x | 2 | 4.4.x > 4.8.0 |
| 4.6.0 | 2 | 4.6.0 > 4.8.0 |
| 4.6.2 | 2 | 4.6.2 > 4.8.0 > 4.8.2 |
| 4.8.0 | 1 | 4.8.0 > 4.8.2 |
NOTES:
- See Supported Upgrade Paths.
- If you are running ATD version 3.8.x or earlier, McAfee strongly recommends a reimage of the ATD appliance directly to version 4.8.0 to minimize the number of upgrade steps and avoid potential upgrade failures. See Migration Criteria.
- Installation could take a minimum of 30 minutes and up to two hours. The time depends on the number of virtual machines and the database size in the deployment.
| Version | File name | SHA |
|---|---|---|
| 3.8.0 | system-3.8.0.29.58939.msu | 3BC121C870AC49FEF57EF406E40055B8867B3150369F013E4395B5555A65FB3C |
| 4.2.x | migration-4.2.0.20.64069.msu | 9CF6A0D7DC9CD8CD713F73FFAD3C81C12A1F3CFD0BF82713D79ABB069FEF1AEF |
| 4.4.x | migration-4.4.0.26.a6835a.msu | 0FF4B2434FD24F13F3D23DBFC8C8E63F7F8B979991A2AC87F61B2362447CCF3B |
| 4.6.0 | migration-4.6.0.21.517580.msu | E9AD833DCCC47626B7AB48B6440CABC1183709A7F0BFE54AD454DF2D993C99D5 |
| 4.6.2 | system-4.6.2.13.8d1e42.msu | ED4A39A9E16237EF863F7E380799C49946DBACE0ABF1D96225723AB4775F7FAF |
| 4.8.0 | migration-4.8.0.17.c4d13a.msu | 58AF249F1F248B826127ECC861EBE5D50E61501C27376AB5893FE5E5370620A5 |
| 4.8.2 | system-4.8.2.13.cc86f4.msu | 2E95F1A25D7E5369A7DCA795A840B765D221C188 |
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: http://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-2020-7254 - Privilege escalation in Advanced Threat Defense
| Base Score | 7.7 |
| Attack Vector (AV) | Local (L) |
| Attack Complexity (AC) | High (H) |
| Privileges Required (PR) | Low (L) |
| User Interaction (UI) | None (N) |
| Scope (S) | Changed (C) |
| Confidentiality (C) | Low (L) |
| Integrity (I) | High (H) |
| Availability (A) | High (H) |
| Temporal Score (Overall) | 6.9 |
| Exploitability (E) | Proof-of-Concept (P) |
| Remediation Level (RL) | Official Fix (O) |
| Report Confidence (RC) | Confirmed (C) |
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:L/AC:H/PR:L/UI:N/S:C/C:L/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 http://www.mcafee.com/us/threat-center/product-security-bulletins.aspx > 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 http://www.mcafee.com/us/threat-center/product-security-bulletins.aspx > Report a Security Vulnerability.
How does McAfee respond to this and any other reported security flaws?
McAfee's key priority is the security of our customers. If a vulnerability is found within any of McAfee's 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 http://www.mcafee.com/us/threat-center/product-security-bulletins.aspx > 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:
- If you are a registered user, type your User ID and Password, and then click Log In.
- If you are not a registered user, click Register and complete the required fields. Your password and logon instructions will be emailed to you.
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.
