McAfee Security Bulletin - McAfee Agent update fixes a vulnerability in handling UDP requests (CVE-2019-3598)
Boletins de segurança ID:   SB10272
Última modificação:  7/23/2019


First Published: February 26, 2019
 Impact of Vulnerability: Buffer Access with Incorrect Length Value (CWE-805)
 CVE ID: CVE-2019-3598
 Severity Rating: Medium
 CVSS v3 Base/Temporal Scores: 5.3 / 4.9
 Recommendations: Install or update to one of the following McAfee Agent (MA) versions:
  • 5.6.1
  • 5.5.1 Hotfix 1267991 (HF1267991)
  • 5.0.6 Hotfix 1267994 (HF1267994)
 Security Bulletin Replacement: None
 Affected Software: MA versions:
  • 5.6.0
  • 5.5.x earlier than 5.5.1 HF1267991
  • 5.0.x earlier than 5.0.6 HF1267994
 Location of updated software: http://www.mcafee.com/us/downloads/downloads.aspx

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Article contents: Vulnerability Description
McAfee Agent handles UDP requests through a configured port as part of its normal operation. A specially crafted UDP packet might allow an attacker on the same subnet to cause a partial denial-of-service in one of the McAfee Agent components.

This update resolves the following issue:

Buffer Access with Incorrect Length Value in McAfee Agent (MA) 5.x allows remote unauthenticated users to potentially cause a partial denial-of-service via specifically crafted UDP packets.

Affected Component:
  • McAfee Agent Common Service
To remediate this issue:
  • Upgrade MA 5.6.0 to 5.6.1.
  • Upgrade MA 5.5.1 and earlier to 5.5.1 HF1267991 or 5.6.1.
  • Upgrade MA 5.0.6 and earlier to 5.0.6 HF1267994, 5.5.1 HF1267991, or 5.6.1.
  • See the second table below if you use an appliance that consumes the McAfee Agent for McAfee Linux Operating System (MLOS).
Go to the Product Downloads site, and download the applicable product update/hotfix file:
Product Version Type File Name Release Date
MA 5.6.1 Update MA561WIN.zip
May 14, 2019
MA 5.5.1 Hotfix MA551HF1267991LNX.zip 
March 21, 2019
MA 5.0.6 Hotfix MA506HF1267994LNX.zip 
March 21, 2019
For products that include an affected version of McAfee Agent for MLOS in their image, see the table below for the remediated version of the product:
Product Version Type File Name Release Date
Data Exchange Layer (DXL) Broker 4.0.x
Hotfix DXL Platform 5.0.1 Hotfix 2 April 9, 2019
DXL Broker 4.0.x
Hotfix DXL Platform 4.1.2 Hotfix 3 April 9, 2019
DXL Broker 4.0.x Hotfix DXL Platform 4.0.0 Hotfix 9 May 7, 2019
Data Loss Prevention (DLP) Monitor/Prevent 11.x
Minor DLP Monitor/Prevent 11.3.0 July 23, 2019
DLP Monitor/Prevent 11.1.x
Update DLP Monitor/Prevent 11.1.200 July 23, 2019
DLP Monitor/Prevent 11.0.x Hotfix  DLP Monitor/Prevent 11.0.701 July 23, 2019
DLP Prevent 10.x  Hotfix DLP Prevent 10.0.303 July 23, 2019
Threat Intelligence Exchange (TIE) Server 2.0.x
Hotfix TIE Server 2.3.1 Hotfix 11 April 9, 2019
TIE Server 2.0.x
Hotfix TIE Server 2.2.0 Hotfix 11 April 23, 2019

1 For TIE Server upgrades, MA is not updated. For fresh installations, the updated version of MA is included. The MA for MLOS package is available on the Product Downloads site. The package is available under the TIE 2.3.0 section for both 2.2.0 HF1 and 2.3.0 installations – McAfee Agent for MLOS Version See KB85586 for instructions on how to update MA through ePO.

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.
McAfee credits Frank Cozijnsen from KPN RED-team for reporting this flaw.
Frequently Asked Questions (FAQs)
How do I know if my McAfee product is vulnerable or not?
For Windows 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 About. The product version displays.
For McAfee Agent (command line):
Use the following instructions for endpoint or client-based products:
  1. Open a terminal.
  2. Enter the following command:
    • For Linux: /opt/McAfee/agent/bin/cmdagent -i
    • For Mac: /Library/McAfee/agent/bin/cmdagent -i
    • For Windows: C:\Program Files\McAfee\Agent\cmdagent -i

    The product version displays in the output.
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-2019-3598: Denial-of-service vulnerability
Base Score 5.3
Attack Vector (AV) Network (N)
Attack Complexity (AC) Low (L)
Privileges Required (PR) None (N)
User Interaction (UI) None (N)
Scope (S) Unchanged (U)
Confidentiality (C) None (N)
Integrity (I) None (N)
Availability (A) Low (L)
Temporal Score (Overall) 4.9
Exploitability (E) Functional (F)
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.

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How do I report a product vulnerability to McAfee?
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How does McAfee respond to this and any other reported security flaws?
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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.
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