Apple iOS/iPadOS up to 16.5.0 WebKit type confusion

CVSS Meta Temp Score
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CTI Interest Score
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7.9$5k-$25k0.00

Summaryinfo

A vulnerability was found in Apple iOS and iPadOS up to 16.5.0. It has been rated as critical. The affected element is an unknown function of the component WebKit. This manipulation causes type confusion. This vulnerability appears as CVE-2023-32439. The attack may be initiated remotely. In addition, an exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in Apple iOS and iPadOS up to 16.5.0 (Smartphone Operating System). Affected by this vulnerability is an unknown function of the component WebKit. The manipulation with an unknown input leads to a type confusion vulnerability. The CWE definition for the vulnerability is CWE-843. The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was presented 06/21/2023 as HT213814 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is known as CVE-2023-32439. It demands that the victim is doing some kind of user interaction. Technical details are unknown but an exploit is available. The pricing for an exploit might be around USD $5k-$25k 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 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 239906 (TencentOS Server 3: webkit2gtk3 (TSSA-2023:0190)), which helps to determine the existence of the flaw in a target environment. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 06/23/2023 with a due date of 07/14/2023:

Apply updates per vendor instructions.

Upgrading to version 16.5.1 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 checks.

The vulnerability is also documented in the databases at Zero-Day.cz (782), Tenable (239906) and EUVD (EUVD-2023-36683). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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

Exploitinginfo

Class: Type confusion
CWE: CWE-843
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Attacked

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 239906
Nessus Name: TencentOS Server 3: webkit2gtk3 (TSSA-2023:0190)

Zero-Day.cz: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: iOS/iPadOS 16.5.1

Timelineinfo

05/08/2023 🔍
06/21/2023 +44 days 🔍
06/21/2023 +0 days 🔍
06/22/2023 +1 days 🔍
01/03/2026 +926 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT213814
Status: Confirmed

CVE: CVE-2023-32439 (🔍)
GCVE (CVE): GCVE-0-2023-32439
GCVE (VulDB): GCVE-100-232183
EUVD: 🔍
scip Labs: https://www.scip.ch/en/?labs.20150917

Entryinfo

Created: 06/22/2023 21:53
Updated: 01/03/2026 03:11
Changes: 06/22/2023 21:53 (18), 06/22/2023 21:57 (28), 07/17/2023 10:36 (2), 07/17/2023 10:42 (11), 04/29/2024 05:57 (24), 05/15/2024 17:15 (1), 06/10/2024 11:38 (2), 09/09/2024 22:30 (2), 02/03/2025 23:43 (11), 04/25/2025 10:41 (3), 06/18/2025 13:40 (2), 01/03/2026 03:11 (1)
Complete: 🔍
Cache ID: 216::103

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

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