CVE-2021-31842 : XML Entity Expansion injection vulnerability in McAfee Endpoint Security (ENS) f

XML Entity Expansion injection vulnerability in McAfee Endpoint Security (ENS) for Windows prior to 10.7.0 September 2021 Update allows a local user to initiate high CPU and memory consumption resulting in a Denial of Service attack through carefully editing the EPDeploy.xml file and then executing the setup process.

Published 2021-09-17 14:15:08

Updated 2022-05-10 18:03:12

Source McAfee (DEFUNCT)

View at NVD, CVE.org

Vulnerability category: Denial of service

Products affected by CVE-2021-31842

Mcafee » Endpoint Security » For Windows
Versions before (<) 10.7.0
cpe:2.3:a:mcafee:endpoint_security:*:*:*:*:*:windows:*:*
Matching versions
Mcafee » Endpoint Security » Version: 10.7.0 Update February 2020 For Windows
cpe:2.3:a:mcafee:endpoint_security:10.7.0:february_2020:*:*:*:windows:*:*
Matching versions
Mcafee » Endpoint Security » Version: 10.7.0 Update July 2020 For Windows
cpe:2.3:a:mcafee:endpoint_security:10.7.0:july_2020:*:*:*:windows:*:*
Matching versions
Mcafee » Endpoint Security » Version: 10.7.0 Update November 2020 For Windows
cpe:2.3:a:mcafee:endpoint_security:10.7.0:november_2020:*:*:*:windows:*:*
Matching versions
Mcafee » Endpoint Security » Version: 10.7.0 Update September 2020 For Windows
cpe:2.3:a:mcafee:endpoint_security:10.7.0:september_2020:*:*:*:windows:*:*
Matching versions
Mcafee » Endpoint Security » Version: 10.7.0 Update April 2020 For Windows
cpe:2.3:a:mcafee:endpoint_security:10.7.0:april_2020:*:*:*:windows:*:*
Matching versions
Mcafee » Endpoint Security » Version: 10.7.0 Update April 2021 For Windows
cpe:2.3:a:mcafee:endpoint_security:10.7.0:april_2021:*:*:*:windows:*:*
Matching versions
Mcafee » Endpoint Security » Version: 10.7.0 Update February 2021 For Windows
cpe:2.3:a:mcafee:endpoint_security:10.7.0:february_2021:*:*:*:windows:*:*
Matching versions
Mcafee » Endpoint Security » Version: 10.7.0 Update June 2021 For Windows
cpe:2.3:a:mcafee:endpoint_security:10.7.0:june_2021:*:*:*:windows:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2021-31842

EPSS FAQ

0.05%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 15 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-31842

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
2.1	LOW	AV:L/AC:L/Au:N/C:N/I:N/A:P	3.9	2.9	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
5.5	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	1.8	3.6	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High
5.0	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H	1.3	3.6	McAfee (DEFUNCT)
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: Required Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2021-31842

CWE-776 Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities.
Assigned by:
- nvd@nist.gov (Secondary)
- psirt@mcafee.com (Primary)

References for CVE-2021-31842

https://kc.mcafee.com/corporate/index?page=content&id=SB10367

Security Bulletin - Endpoint Security for Windows update fixes two vulnerabilities (CVE-2021-31843, CVE-2021-31842) and updates the cURL library
Patch;Vendor Advisory

CVEs referencing this url

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Vulnerability Details : CVE-2021-31842

Products affected by CVE-2021-31842

Exploit prediction scoring system (EPSS) score for CVE-2021-31842

CVSS scores for CVE-2021-31842

CWE ids for CVE-2021-31842

References for CVE-2021-31842