Apple tvOS up to 16.1.1 WebKit type confusion

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.
7.9$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Apple tvOS up to 16.1.1. Impacted is an unknown function of the component WebKit. The manipulation results in type confusion. This vulnerability was named CVE-2022-42856. The attack may be performed from remote. In addition, an exploit is available. It is advisable to upgrade the affected component. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Detailsinfo

A vulnerability classified as critical has been found in Apple tvOS up to 16.1.1 (Digital Media Player). Affected is an unknown functionality of the component WebKit. The manipulation with an unknown input leads to a type confusion vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was presented 12/13/2022 by Clément Lecigne as HT213535 as confirmed advisory (Website). The advisory is shared for download at support.apple.com. This vulnerability is traded as CVE-2022-42856. Successful exploitation requires user interaction by the victim. Technical details are unknown but an exploit is available. 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 against versions of iOS released before iOS 15.1.

It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 239990 (TencentOS Server 3: webkit2gtk3 (TSSA-2023:0001)), which helps to determine the existence of the flaw in a target environment. This issue was added on 12/14/2022 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 01/04/2023:

Apply updates per vendor instructions.

Upgrading to version 16.2 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 state handling.

The vulnerability is also documented in the databases at Zero-Day.cz (740) and Tenable (239990). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

Version

License

Website

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

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

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: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 239990
Nessus Name: TencentOS Server 3: webkit2gtk3 (TSSA-2023:0001)

Zero-Day.cz: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: tvOS 16.2

Timelineinfo

10/11/2022 🔍
12/13/2022 +63 days 🔍
12/13/2022 +0 days 🔍
12/14/2022 +1 days 🔍
06/17/2025 +916 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT213535
Researcher: Clément Lecigne
Status: Confirmed

CVE: CVE-2022-42856 (🔍)
GCVE (CVE): GCVE-0-2022-42856
GCVE (VulDB): GCVE-100-215748
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 12/14/2022 10:30 AM
Updated: 06/17/2025 05:06 PM
Changes: 12/14/2022 10:30 AM (19), 12/14/2022 10:33 AM (28), 01/12/2023 07:21 AM (2), 01/12/2023 07:26 AM (11), 04/28/2024 05:51 AM (23), 06/15/2024 12:29 PM (2), 06/29/2024 03:20 AM (1), 09/26/2024 12:40 PM (2), 01/28/2025 11:29 PM (11), 04/28/2025 03:14 PM (3), 06/17/2025 05:06 PM (2)
Complete: 🔍
Cache ID: 18:03E:40

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Interested in the pricing of exploits?

See the underground prices here!