Apple watchOS up to 9.1 libxml2 integer overflow

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.
6.7$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Apple watchOS up to 9.1. This affects an unknown function of the component libxml2. This manipulation causes integer overflow. This vulnerability is tracked as CVE-2022-40303. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in Apple watchOS up to 9.1 (Smartwatch Operating System) and classified as critical. Affected by this vulnerability is some unknown functionality of the component libxml2. 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 disclosed 12/13/2022 by Maddie Stone as HT213536 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is known as CVE-2022-40303. 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 advisory points out:

A remote user may be able to cause unexpected app termination or arbitrary code execution

The vulnerability scanner Nessus provides a plugin with the ID 211168 (Fedora 37 : libxml2 / xmlsec1 (2022-a6812b0224)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 9.2 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 through improved input validation.

The vulnerability is also documented in the vulnerability database at Tenable (211168). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.7

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 211168
Nessus Name: Fedora 37 : libxml2 / xmlsec1 (2022-a6812b0224)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: watchOS 9.2
Patch: gitlab.gnome.org

Timelineinfo

09/09/2022 🔍
12/13/2022 +95 days 🔍
12/13/2022 +0 days 🔍
12/14/2022 +1 days 🔍
04/29/2025 +867 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT213536
Researcher: Maddie Stone
Status: Confirmed

CVE: CVE-2022-40303 (🔍)
GCVE (CVE): GCVE-0-2022-40303
GCVE (VulDB): GCVE-100-215707

Entryinfo

Created: 12/14/2022 09:41
Updated: 04/29/2025 10:30
Changes: 12/14/2022 09:41 (19), 12/14/2022 09:45 (27), 01/09/2023 16:51 (3), 01/09/2023 16:58 (11), 11/17/2024 02:27 (17), 04/28/2025 15:14 (3), 04/29/2025 10:30 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Interested in the pricing of exploits?

See the underground prices here!