Apple macOS up to 11.1 WebKit type confusion

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CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

A vulnerability was found in Apple macOS up to 11.1 (Operating System). It has been rated as critical. Affected by this issue is an unknown code block of the component WebKit. The manipulation with an unknown input leads to a privilege escalation vulnerability. Using CWE to declare the problem leads to CWE-843. Impacted is confidentiality, integrity, and availability.

The weakness was presented 02/01/2021 by S0rryMybad as HT212147 as confirmed advisory (Website). The advisory is available at support.apple.com. This vulnerability is handled as CVE-2021-1789 since 12/08/2020. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 02/23/2021). It is expected to see the exploit prices for this product increasing in the near future. The advisory points out:

Processing maliciously crafted web content may lead to arbitrary code execution

Upgrading to version 11.2 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

A type confusion issue was addressed with improved state handling.

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CPE 2.3infoedit

CPE 2.2infoedit

CVSSv3infoedit

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

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

CVSSv2infoedit

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

Exploitinginfoedit

Class: Privilege escalation
CWE: CWE-843
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
Predictions: 🔍
Remediation: 🔍

Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔒
0-Day Time: 🔒
Exposure Time: 🔒

Upgrade: macOS 11.2

Timelineinfoedit

12/08/2020 CVE assigned
02/01/2021 +55 days Advisory disclosed
02/01/2021 +0 days Countermeasure disclosed
02/03/2021 +2 days VulDB entry created
02/23/2021 +20 days VulDB last update

Sourcesinfoedit

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

Advisory: HT212147
Researcher: S0rryMybad
Status: Confirmed

CVE: CVE-2021-1789 (🔒)
scip Labs: https://www.scip.ch/en/?labs.20180712

Entryinfoedit

Created: 02/03/2021 02:14 PM
Updated: 02/23/2021 08:47 AM
Changes: (4) source_cve_assigned vulnerability_cvss2_vuldb_tempscore vulnerability_cvss3_vuldb_tempscore vulnerability_cvss3_meta_tempscore
Complete: 🔍

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