VDB-240991 · CVE-2023-39928 · WSA-2023-0009

WebKitGTK/WPE WebKit up to 2.41.x MediaRecorder API use after free

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.
7.4	$0-$5k	0.00

Summaryinfo

A vulnerability identified as critical has been detected in WebKitGTK and WPE WebKit up to 2.41.x. This vulnerability affects unknown code of the component MediaRecorder API. This manipulation causes use after free. This vulnerability is handled as CVE-2023-39928. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in WebKitGTK and WPE WebKit up to 2.41.x (Web Browser). It has been declared as critical. Affected by this vulnerability is some unknown functionality of the component MediaRecorder API. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was released 09/30/2023 as WSA-2023-0009. It is possible to read the advisory at webkitgtk.org. This vulnerability is known as CVE-2023-39928 since 08/14/2023. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 2.42.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2024-1213). Be aware that VulDB is the high quality source for vulnerability data.

Affected

Amazon Linux 2
Red Hat Enterprise Linux
Fedora Linux
Oracle Linux

Productinfo

Type

Web Browser

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

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

CNA Base Score: 8.8
CNA Vector (Talos): 🔍

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: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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: 🔍

0-Day Time: 🔍

Upgrade: WebKitGTK/WPE WebKit 2.42.0

Timelineinfo

08/14/2023 🔍
09/30/2023 +47 days 🔍
09/30/2023 +0 days 🔍
09/06/2025 +707 days 🔍

Sourcesinfo

Advisory: WSA-2023-0009
Status: Confirmed

CVE: CVE-2023-39928 (🔍)
GCVE (CVE): GCVE-0-2023-39928
GCVE (VulDB): GCVE-100-240991
CERT Bund: WID-SEC-2024-1213 - Red Hat Enterprise Linux: Mehrere Schwachstellen

Entryinfo

Created: 09/30/2023 14:58
Updated: 09/06/2025 16:42
Changes: 09/30/2023 14:58 (39), 10/22/2023 23:31 (1), 10/22/2023 23:44 (12), 09/06/2025 16:42 (22)
Complete: 🔍
Cache ID: 216::103