Apple macOS up to 10.13.5 Kernel memory corruption

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CVSS Meta Temp Score
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5.9$0-$5k0.00

A vulnerability, which was classified as critical, was found in Apple macOS up to 10.13.5 (Operating System). This affects some unknown functionality of the component Kernel. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. This is going to have an impact on confidentiality, integrity, and availability.

The bug was discovered 05/29/2018. The weakness was shared 06/01/2018 by Ian Beer with Google Project Zero as HT208849 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is uniquely identified as CVE-2018-4241 since 01/02/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are unknown but a public exploit is available. The advisory points out:

A buffer overflow was addressed with improved bounds checking.

It is declared as proof-of-concept. The exploit is shared for download at exploit-db.com. The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 110324 (macOS 10.13.x < 10.13.5 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 370985 (Apple macOS High Sierra 10.13.5, Security Update 2018-003 Sierra, Security Update 2018-003 El Capitan Not Installed).

Upgrading to version 10.13.5 2018-003 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (110324). The entries 118673, 118642, 118643 and 118644 are related to this item.

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VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 5.9

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

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Exploitinginfoedit

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 110324
Nessus Name: macOS 10.13.x < 10.13.5 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
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Qualys Name: 🔍

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Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

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Upgrade: macOS 10.13.5 2018-003

Timelineinfoedit

01/02/2018 🔍
05/29/2018 +147 days 🔍
06/01/2018 +3 days 🔍
06/01/2018 +0 days 🔍
06/03/2018 +2 days 🔍
06/05/2018 +2 days 🔍
06/08/2018 +3 days 🔍
02/12/2020 +614 days 🔍

Sourcesinfoedit

Vendor: https://www.apple.com/

Advisory: HT208849
Researcher: Ian Beer
Organization: Google Project Zero
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-4241 (🔍)
scip Labs: https://www.scip.ch/en/?labs.20180712
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Entryinfoedit

Created: 06/03/2018 02:15 PM
Updated: 02/12/2020 08:25 AM
Changes: (15) vulnerability_discoverydate advisory_confirm_url exploit_availability exploit_publicity exploit_url source_cve_assigned source_cve_nvd_published source_exploitdb source_nessus_id source_nessus_name source_nessus_filename source_nessus_family source_openvas_filename source_openvas_title source_openvas_family
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