Apple macOS up to 11.1 WebKit Remote Code Execution

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CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.9$5k-$25k0.07

A vulnerability classified as critical was found in Apple macOS up to 11.1 (Operating System). This vulnerability affects an unknown function of the component WebKit. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was published 02/01/2021 as HT212147 as confirmed advisory (Website). The advisory is shared for download at support.apple.com. This vulnerability was named CVE-2021-1870 since 12/08/2020. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details are unknown but an exploit is available. The current price for an exploit might be approx. USD $5k-$25k (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:

A remote attacker may be able to cause arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

It is declared as functional.

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 logic issue was addressed with improved restrictions.

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VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.3
VulDB Temp Score: 5.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

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

Exploitinginfoedit

Class: Unknown
CWE: Unknown
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Functional

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
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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
Status: Confirmed

CVE: CVE-2021-1870 (🔒)
scip Labs: https://www.scip.ch/en/?labs.20180712

Entryinfoedit

Created: 02/03/2021 02:15 PM
Updated: 02/23/2021 08:55 AM
Changes: (1) source_cve_assigned
Complete: 🔍

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