VDB-132894 · CVE-2018-4321 · BID 85054

Apple MacOS X up to 10.13 Entitlement Verification input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability classified as critical has been found in Apple MacOS X up to 10.13 (Operating System). Affected is some unknown processing of the component Entitlement Verification Handler. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability.

The bug was discovered 09/24/2018. The weakness was shared 04/03/2019. This vulnerability is traded as CVE-2018-4321 since 01/02/2018. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 118178 (macOS < 10.14 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family MacOS X Local Security Checks and running in the context combined. The commercial vulnerability scanner Qualys is able to test this issue with plugin 371218 (Apple macOS Mojave 10.14 Not Installed (APPLE-SA-2018-9-24-1)).

Upgrading to version 10.14 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (118178). The entries 78550, 78551, 79411 and 79583 are related to this item.






  • commercial


  • end of life

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍


Class: Input validation
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 118178
Nessus Name: macOS < 10.14 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: MacOS X 10.14


03/21/2016 🔍
01/02/2018 +652 days 🔍
09/24/2018 +265 days 🔍
09/24/2018 +0 days 🔍
10/18/2018 +24 days 🔍
04/03/2019 +167 days 🔍
04/04/2019 +1 days 🔍
09/22/2022 +1267 days 🔍


Vendor: apple.com

Status: Confirmed

CVE: CVE-2018-4321 (🔍)
SecurityFocus: 85054 - Apple Mac OS X Server APPLE-SA-2016-03-21-7 Multiple Security Vulnerabilities

scip Labs: https://www.scip.ch/en/?labs.20180712
See also: 🔍


Created: 04/04/2019 09:17 AM
Updated: 09/22/2022 03:59 PM
Changes: 04/04/2019 09:17 AM (70), 05/24/2020 05:18 PM (3), 09/22/2022 03:59 PM (3)
Complete: 🔍


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