Apple macOS up to 13.3 WebKit buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Apple macOS up to 13.3. Impacted is an unknown function of the component WebKit. The manipulation leads to buffer overflow. This vulnerability is uniquely identified as CVE-2023-32423. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple macOS up to 13.3 (Operating System) and classified as problematic. This issue affects some unknown processing of the component WebKit. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality. The summary by CVE is:

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in watchOS 9.5, tvOS 16.5, macOS Ventura 13.4, Safari 16.5, iOS 16.5 and iPadOS 16.5. Processing web content may disclose sensitive information.

The weakness was disclosed 05/18/2023 by Ignacio Sanmillan as HT213758 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. The identification of this vulnerability is CVE-2023-32423. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/03/2026). It is expected to see the exploit prices for this product increasing in the near future. The advisory points out:

Processing web content may disclose sensitive information

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.

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 buffer overflow issue was addressed with improved memory handling.

The vulnerability is also documented in the databases at Tenable (212173) and EUVD (EUVD-2023-36667). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Vendor

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

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 🔍
01/03/2026 +958 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT213758
Researcher: Ignacio Sanmillan
Status: Confirmed

CVE: CVE-2023-32423 (🔍)
GCVE (CVE): GCVE-0-2023-32423
GCVE (VulDB): GCVE-100-229487
EUVD: 🔍
scip Labs: https://www.scip.ch/en/?labs.20180712

Entryinfo

Created: 05/20/2023 07:21
Updated: 01/03/2026 00:40
Changes: 05/20/2023 07:21 (19), 05/20/2023 07:24 (10), 05/20/2023 07:25 (18), 06/14/2023 18:36 (1), 10/09/2024 16:39 (27), 12/09/2024 19:40 (2), 04/26/2025 15:25 (3), 01/03/2026 00:40 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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