Apple iCloud up to 7.3 on Windows WebKit memory corruption

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CVSS Meta Temp Score
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7.2$0-$5k0.00

A vulnerability, which was classified as critical, has been found in Apple iCloud up to 7.3 on Windows (Cloud Software). Affected by this issue is an unknown function of the component WebKit. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. Impacted is confidentiality, integrity, and availability.

The bug was discovered 03/29/2018. The weakness was disclosed 03/29/2018 by Jeonghoon Shin (OSS-Fuzz) with Theori as HT208697 as confirmed advisory (Website). The advisory is shared for download at support.apple.com. This vulnerability is handled as CVE-2018-4118 since 01/02/2018. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 06/03/2020). The advisory points out:

Multiple memory corruption issues were addressed with improved memory handling.

The vulnerability scanner Nessus provides a plugin with the ID 109468 (Ubuntu 16.04 LTS / 17.10 : webkit2gtk vulnerabilities (USN-3635-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context local. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171677 (SUSE Enterprise Linux Security Update for webkit2gtk3 (SUSE-SU-2018:3387-1)).

Upgrading to version 7.4 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 SecurityFocus (BID 102775) and Tenable (109468). The entries 111120, 111127, 111128 and 111129 are pretty similar.

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CVSSv3infoedit

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2infoedit

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VulDB Base Score: 🔍
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VulDB Reliability: 🔍

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Exploitinginfoedit

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

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 109468
Nessus Name: Ubuntu 16.04 LTS / 17.10 : webkit2gtk vulnerabilities (USN-3635-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 53931
OpenVAS Name: Apple iCloud Security Updates(HT208697)-Windows
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfoedit

Threat: 🔍
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Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

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

Upgrade: iCloud 7.4

Timelineinfoedit

01/02/2018 🔍
01/23/2018 +21 days 🔍
03/29/2018 +65 days 🔍
03/29/2018 +0 days 🔍
03/29/2018 +0 days 🔍
03/31/2018 +2 days 🔍
04/03/2018 +3 days 🔍
05/01/2018 +28 days 🔍
06/03/2020 +764 days 🔍

Sourcesinfoedit

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

Advisory: HT208697
Researcher: Jeonghoon Shin (OSS-Fuzz)
Organization: Theori
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-4118 (🔍)
SecurityFocus: 102775 - WebKit Multiple Memory Corruption Vulnerabilities

See also: 🔍

Entryinfoedit

Created: 03/31/2018 09:52 PM
Updated: 06/03/2020 02:15 PM
Changes: (17) vulnerability_discoverydate advisory_person_name advisory_person_nickname advisory_company_name advisory_confirm_url source_cve_assigned source_cve_nvd_published source_securityfocus_date source_securityfocus_class source_nessus_id source_nessus_name source_nessus_filename source_nessus_family source_openvas_id source_openvas_filename source_openvas_title source_openvas_family
Complete: 🔍

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