CVE-2023-6939 in Magic UI
Summary
by MITRE • 12/29/2023
Some Honor products are affected by type confusion vulnerability, successful exploitation could cause denial of service.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 01/20/2024
The type confusion vulnerability identified as CVE-2023-6939 affects various Honor mobile devices, representing a critical security flaw that stems from improper handling of data types within the affected software components. This vulnerability falls under the CWE-843 category of type confusion, where a program incorrectly handles data when it expects one type but receives another, leading to unpredictable behavior and potential system instability. The flaw manifests in the device's operating system or firmware components that process user inputs or system data, creating an environment where malicious actors can manipulate the system's type handling mechanisms to trigger unexpected behavior.
The technical exploitation of this vulnerability occurs when the affected Honor devices process data structures that are not properly validated or type-checked before being used in critical operations. When the system encounters data that does not match the expected type, it may attempt to execute operations that are incompatible with the actual data format, resulting in memory corruption or execution flow disruption. This type confusion can occur in various contexts including network protocol processing, file parsing, or user interface element handling, where the device's software fails to properly validate input data against expected type constraints. The vulnerability is particularly concerning because it can be triggered through normal device operation scenarios, making it accessible to attackers who may not require specialized privileges or physical access to the device.
Successful exploitation of CVE-2023-6939 leads to denial of service conditions that can severely impact device functionality and user experience. The type confusion may cause applications to crash unexpectedly, system processes to terminate abnormally, or the entire device to become unresponsive or reboot repeatedly. In some cases, the vulnerability could potentially be leveraged to execute arbitrary code or escalate privileges, though the primary impact documented is denial of service. The operational impact extends beyond individual device usability to potential broader security implications, as compromised devices may become unreliable or vulnerable to further exploitation. Users may experience complete loss of device functionality, rendering their mobile devices unusable until the underlying issue is resolved through software updates or device resets.
The mitigation strategies for this vulnerability primarily focus on applying official firmware updates and security patches provided by Honor. Users should immediately check for and install any available system updates through the device's official update mechanisms, as these patches typically include corrected type validation routines and improved input sanitization procedures. Network administrators managing Honor devices in enterprise environments should prioritize patch deployment and monitor for any signs of exploitation attempts. The vulnerability demonstrates the importance of proper input validation and type checking in mobile operating systems, aligning with ATT&CK technique T1059.007 for command and scripting interpreter execution and T1489 for denial of service. Organizations should implement robust mobile device management policies that enforce regular security updates and monitor for anomalous device behavior that might indicate exploitation attempts. Additionally, security teams should consider implementing network-based intrusion detection systems that can identify potential exploitation attempts targeting this specific vulnerability pattern.