Apple iOS/iPadOS up to 16.4.1 WebKit out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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5.7$5k-$25k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Apple iOS and iPadOS up to 16.4.1. This affects an unknown part of the component WebKit. Executing a manipulation can lead to out-of-bounds. This vulnerability appears as CVE-2023-28204. The attack may be performed from remote. In addition, an exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic was found in Apple iOS and iPadOS up to 16.4.1 (Smartphone Operating System). This vulnerability affects an unknown code block of the component WebKit. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality. CVE summarizes:

An out-of-bounds read was addressed with improved input validation. 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 web content may disclose sensitive information. Apple is aware of a report that this issue may have been actively exploited.

The weakness was presented 05/18/2023 as HT213757 as confirmed advisory (Website). The advisory is shared for download at support.apple.com. This vulnerability was named CVE-2023-28204. 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 12/03/2025). 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. 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 16.5 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

An out-of-bounds read was addressed with improved input validation.

The vulnerability is also documented in the databases at Zero-Day.cz (768), Tenable (212173) and EUVD (EUVD-2023-31912). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.8
VulDB Meta Temp Score: 5.7

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

NVD Base Score: 6.5
NVD Vector: 🔍

CNA Base Score: 6.5
CNA Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / 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: iOS/iPadOS 16.5

Timelineinfo

03/13/2023 🔍
05/18/2023 +65 days 🔍
05/18/2023 +0 days 🔍
05/20/2023 +2 days 🔍
12/03/2025 +928 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT213757
Status: Confirmed

CVE: CVE-2023-28204 (🔍)
GCVE (CVE): GCVE-0-2023-28204
GCVE (VulDB): GCVE-100-229528
EUVD: 🔍
scip Labs: https://www.scip.ch/en/?labs.20150917

Entryinfo

Created: 05/20/2023 07:57
Updated: 12/03/2025 17:02
Changes: 05/20/2023 07:57 (18), 05/20/2023 08:00 (29), 06/15/2023 07:33 (1), 04/28/2024 17:44 (23), 05/15/2024 17:15 (1), 06/12/2024 00:12 (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 15:16 (3), 12/03/2025 17:02 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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