Apple iOS/iPadOS Web Contents memory corruption

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$5k-$25k0.00

Summaryinfo

A vulnerability was found in Apple iOS and iPadOS. It has been rated as critical. This issue affects some unknown processing of the component Web Contents Handler. This manipulation causes memory corruption. This vulnerability is tracked as CVE-2023-42917. The attack is possible to be carried out remotely. Moreover, an exploit is present. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in Apple iOS and iPadOS (Smartphone Operating System) (version unknown). Affected by this vulnerability is an unknown function of the component Web Contents Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A memory corruption vulnerability was addressed with improved locking. This issue is fixed in iOS 17.1.2 and iPadOS 17.1.2, macOS Sonoma 14.1.2, Safari 17.1.2. Processing web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited against versions of iOS before iOS 16.7.1.

The weakness was disclosed 12/01/2023. It is possible to read the advisory at support.apple.com. This vulnerability is known as CVE-2023-42917 since 09/14/2023. It demands that the victim is doing some kind of user interaction. Technical details are unknown but an exploit is available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 02/04/2025). It is expected to see the exploit prices for this product increasing in the near future.

It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 209883 (RHEL 9 : webkit2gtk3 (RHSA-2024:8496)), which helps to determine the existence of the flaw in a target environment. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 12/04/2023 with a due date of 12/25/2023:

Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Zero-Day.cz (838) and Tenable (209883). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

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: Memory corruption
CWE: 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: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 209883
Nessus Name: RHEL 9 : webkit2gtk3 (RHSA-2024:8496)

Zero-Day.cz: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

09/14/2023 🔍
12/01/2023 +78 days 🔍
12/01/2023 +0 days 🔍
04/21/2025 +507 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: FEDORA-2023-540bb86780
Status: Confirmed

CVE: CVE-2023-42917 (🔍)
GCVE (CVE): GCVE-0-2023-42917
GCVE (VulDB): GCVE-100-246547
scip Labs: https://www.scip.ch/en/?labs.20150917

Entryinfo

Created: 12/01/2023 06:44
Updated: 04/21/2025 02:36
Changes: 12/01/2023 06:44 (41), 12/21/2023 13:28 (1), 12/21/2023 13:34 (11), 04/30/2024 07:43 (23), 05/15/2024 17:15 (1), 06/05/2024 16:21 (2), 06/11/2024 05:07 (2), 09/09/2024 22:30 (1), 10/30/2024 09:40 (2), 02/04/2025 01:40 (11), 04/21/2025 02:36 (3)
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 ▸

Want to stay up to date on a daily basis?

Enable the mail alert feature now!