Apple iOS/iPadOS up to 16.3.1 Core Bluetooth out-of-bounds

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.1	$5k-$25k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Apple iOS and iPadOS up to 16.3.1. This issue affects some unknown processing of the component Core Bluetooth. Executing a manipulation can lead to out-of-bounds. This vulnerability appears as CVE-2023-23528. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in Apple iOS and iPadOS up to 16.3.1 (Smartphone Operating System) and classified as problematic. This vulnerability affects some unknown functionality of the component Core Bluetooth. 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.

The weakness was presented 03/27/2023 by Jianjun Dai and Guang Gong as HT213676 as confirmed advisory (Website). The advisory is available at support.apple.com. This vulnerability was named CVE-2023-23528. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 10/12/2025). It is expected to see the exploit prices for this product increasing in the near future. The advisory points out:

Processing a maliciously crafted Bluetooth packet may result in disclosure of process memory

Upgrading to version 16.4 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 bounds checking.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-27628). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Smartphone Operating System

Vendor

Apple

Name

Version

License

commercial

Website

Vendor: https://www.apple.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

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

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: iOS/iPadOS 16.4

Timelineinfo

01/12/2023 🔍
03/27/2023 +73 days 🔍
03/27/2023 +0 days 🔍
03/29/2023 +2 days 🔍
10/12/2025 +928 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT213676
Researcher: Jianjun Dai, Guang Gong
Status: Confirmed

CVE: CVE-2023-23528 (🔍)
GCVE (CVE): GCVE-0-2023-23528
GCVE (VulDB): GCVE-100-224338
EUVD: 🔍
scip Labs: https://www.scip.ch/en/?labs.20150917

Entryinfo

Created: 03/29/2023 09:51
Updated: 10/12/2025 08:49
Changes: 03/29/2023 09:51 (16), 03/29/2023 09:52 (3), 03/29/2023 09:55 (28), 04/16/2023 18:46 (1), 10/12/2025 08:49 (16)
Complete: 🔍
Cache ID: 216::103

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