Apple macOS up to 13.4.0 Kernel integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Apple macOS up to 13.4.0 and classified as critical. This vulnerability affects unknown code of the component Kernel. Executing a manipulation can lead to integer overflow. This vulnerability is registered as CVE-2023-32434. The attack needs to be launched locally. Furthermore, an exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple macOS up to 13.4.0 (Operating System). It has been declared as critical. This vulnerability affects an unknown code of the component Kernel. The manipulation with an unknown input leads to a integer overflow vulnerability. The CWE definition for the vulnerability is CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was published 06/21/2023 by Georgy Kucherin as HT213813 as confirmed advisory (Website). The advisory is shared for download at support.apple.com. This vulnerability was named CVE-2023-32434. Technical details are unknown but an exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 02/03/2025). It is expected to see the exploit prices for this product increasing in the near future. The advisory points out:

An app may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited against versions of iOS released before iOS 15.7.

It is declared as attacked. This issue was added on 06/23/2023 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 07/14/2023:

Apply updates per vendor instructions.

Upgrading to version 13.4.1 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

An integer overflow was addressed with improved input validation.

The vulnerability is also documented in the vulnerability database at Zero-Day.cz (781). Once again VulDB remains the best 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: 7.8
VulDB Meta Temp Score: 7.7

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CNA Base Score: 7.8
CNA Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

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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Zero-Day.cz: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: macOS 13.4.1

Timelineinfo

05/08/2023 🔍
06/21/2023 +44 days 🔍
06/21/2023 +0 days 🔍
06/22/2023 +1 days 🔍
02/03/2025 +592 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT213813
Researcher: Georgy Kucherin
Status: Confirmed

CVE: CVE-2023-32434 (🔍)
GCVE (CVE): GCVE-0-2023-32434
GCVE (VulDB): GCVE-100-232180
scip Labs: https://www.scip.ch/en/?labs.20180712

Entryinfo

Created: 06/22/2023 21:51
Updated: 02/03/2025 23:43
Changes: 06/22/2023 21:51 (20), 06/22/2023 21:54 (27), 07/17/2023 10:05 (2), 07/17/2023 10:12 (10), 04/28/2024 21:22 (26), 06/10/2024 14:23 (2), 09/09/2024 22:30 (2), 02/03/2025 23:43 (10)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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