Apple macOS up to 10.14.0 EFI information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Apple macOS up to 10.14.0. It has been rated as critical. The impacted element is an unknown function of the component EFI. The manipulation leads to information disclosure. This vulnerability is uniquely identified as CVE-2018-3639. Local access is required to approach this attack. Moreover, an exploit is present. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Apple macOS up to 10.14.0 (Operating System). It has been rated as problematic. This issue affects an unknown function of the component EFI. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality.

The bug was discovered 05/21/2018. The weakness was disclosed 10/29/2018 by Jann Horn with Google Project Zero as HT209193 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. The identification of this vulnerability is CVE-2018-3639. The exploitation is known to be easy. Attacking locally is a requirement. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK. The advisory points out:

An information disclosure issue was addressed with a microcode update. This ensures that older data read from recently-written-to addresses cannot be read via a speculative side-channel.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 111304 (Photon OS 2.0 : linux-esx / linux / patch / linux-aws / linux-secure (PhotonOS-PHSA-2018-2.0-0049) (deprecated)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family PhotonOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 371045 (F5 BIG-IP ASM Multiple Vulnerabilitites (K24578092,K29146534,K51801290,K93472064)).

Upgrading to version 10.14.1 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (44695), Tenable (111304) and SecurityFocus (BID 104232†). The entries VDB-97117, VDB-109797, VDB-117820 and VDB-118107 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.2

VulDB Base Score: 3.3
VulDB Temp Score: 3.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 111304
Nessus Name: Photon OS 2.0 : linux-esx / linux / patch / linux-aws / linux-secure (PhotonOS-PHSA-2018-2.0-0049) (deprecated)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 54958
OpenVAS Name: CentOS Update for java CESA-2018:1650 centos6
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: macOS 10.14.1

Timelineinfo

12/28/2017 🔍
05/21/2018 +144 days 🔍
05/21/2018 +0 days 🔍
05/22/2018 +1 days 🔍
07/24/2018 +63 days 🔍
10/29/2018 +97 days 🔍
10/29/2018 +0 days 🔍
10/31/2018 +1 days 🔍
02/01/2025 +2285 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT209193
Researcher: Jann Horn
Organization: Google Project Zero
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-3639 (🔍)
GCVE (CVE): GCVE-0-2018-3639
GCVE (VulDB): GCVE-100-126287

OVAL: 🔍

CERT: 🔍
SecurityFocus: 104232 - Multiple CPU Hardware CVE-2018-3639 Information Disclosure Vulnerability
SecurityTracker: 1040949

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

Entryinfo

Created: 10/31/2018 10:13
Updated: 02/01/2025 21:18
Changes: 10/31/2018 10:13 (84), 04/08/2020 18:13 (7), 06/03/2023 16:03 (6), 07/14/2024 14:56 (14), 02/01/2025 21:18 (1)
Complete: 🔍
Cache ID: 216:AFF:103

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