Vulnerability Details : CVE-2021-31847
Improper access control vulnerability in the repair process for McAfee Agent for Windows prior to 5.7.4 could allow a local attacker to perform a DLL preloading attack using unsigned DLLs. This would result in elevation of privileges and the ability to execute arbitrary code as the system user, through not correctly protecting a temporary directory used in the repair process and not checking the DLL signature.
Vulnerability category: Execute codeGain privilege
Products affected by CVE-2021-31847
- cpe:2.3:a:mcafee:agent:*:*:*:*:*:windows:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-31847
0.03%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-31847
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.9
|
MEDIUM | AV:L/AC:M/Au:N/C:C/I:C/A:C |
3.4
|
10.0
|
NIST | |
|
7.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
NIST | |
|
8.2
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H |
1.5
|
6.0
|
McAfee (DEFUNCT) | |
|
8.2
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H |
1.5
|
6.0
|
Trellix |
CWE ids for CVE-2021-31847
-
The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.Assigned by:
- psirt@mcafee.com (Primary)
- trellixpsirt@trellix.com (Secondary)
-
The product does not verify, or incorrectly verifies, the cryptographic signature for data.Assigned by:
- psirt@mcafee.com (Primary)
- trellixpsirt@trellix.com (Secondary)
-
The product uses a fixed or controlled search path to find resources, but one or more locations in that path can be under the control of unintended actors.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-31847
-
https://www.zerodayinitiative.com/advisories/ZDI-21-1104/
ZDI-21-1104 | Zero Day InitiativeThird Party Advisory;VDB Entry
-
https://kc.mcafee.com/corporate/index?page=content&id=SB10369
Security Bulletin - McAfee Agent for Windows update fixes three vulnerabilities (CVE-2021-31836, CVE-2021-31841, CVE-2021-31847)Broken Link
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