Apple macOS up to 13.3 WebKit use after free

CVSS Meta Temp Score
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CTI Interest Score
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7.9$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Apple macOS up to 13.3. This affects an unknown function of the component WebKit. Such manipulation leads to use after free. This vulnerability is referenced as CVE-2023-32373. It is possible to launch the attack remotely. Furthermore, an exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple macOS up to 13.3 (Operating System). It has been rated as critical. Affected by this issue is some unknown functionality of the component WebKit. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A use-after-free issue was addressed with improved memory management. This issue is fixed in watchOS 9.5, tvOS 16.5, macOS Ventura 13.4, iOS 15.7.6 and iPadOS 15.7.6, Safari 16.5, iOS 16.5 and iPadOS 16.5. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

The weakness was published 05/18/2023 as HT213758 as confirmed advisory (Website). The advisory is available at support.apple.com. This vulnerability is handled as CVE-2023-32373. Successful exploitation requires user interaction by the victim. Technical details are unknown but an exploit is available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 01/01/2026). 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. Apple is aware of a report that this issue may have been actively exploited.

It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 212173 (Apple Safari 16.5 Multiple Vulnerabilities (102735)), which helps to determine the existence of the flaw in a target environment. This issue was added on 05/22/2023 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 06/12/2023:

Apply updates per vendor instructions.

Upgrading to version 13.4 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

A use-after-free issue was addressed with improved memory management.

The vulnerability is also documented in the databases at Zero-Day.cz (769), Tenable (212173) and EUVD (EUVD-2023-36617). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.9

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

NVD Base Score: 8.8
NVD Vector: 🔍

CNA Base Score: 8.8
CNA Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Attacked

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 212173
Nessus Name: Apple Safari 16.5 Multiple Vulnerabilities (102735)

Zero-Day.cz: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: macOS 13.4

Timelineinfo

05/08/2023 🔍
05/18/2023 +10 days 🔍
05/18/2023 +0 days 🔍
05/20/2023 +2 days 🔍
01/01/2026 +956 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT213758
Status: Confirmed

CVE: CVE-2023-32373 (🔍)
GCVE (CVE): GCVE-0-2023-32373
GCVE (VulDB): GCVE-100-229490
EUVD: 🔍
scip Labs: https://www.scip.ch/en/?labs.20180712

Entryinfo

Created: 05/20/2023 07:23
Updated: 01/01/2026 00:51
Changes: 05/20/2023 07:23 (18), 05/20/2023 07:26 (28), 06/14/2023 18:58 (1), 04/28/2024 18:12 (26), 05/15/2024 17:15 (1), 06/11/2024 16:46 (2), 06/28/2024 02:28 (12), 09/09/2024 22:30 (2), 12/09/2024 18:44 (2), 02/03/2025 23:43 (11), 04/26/2025 15:25 (3), 01/01/2026 00:51 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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