CVE-2023-21058 : Security Advisory and Response

This article provides detailed information about CVE-2023-21058, a recently published vulnerability in the Android system that could potentially lead to remote code execution.

Understanding CVE-2023-21058

CVE-2023-21058 is a security vulnerability identified in the Android system that poses a risk of out of bounds write due to a missing bounds check in the lcsm_SendRrAcquiAssist function of lcsm_bcm_assist.c. This vulnerability could be exploited by attackers to achieve remote code execution without requiring additional execution privileges. Notably, user interaction is not necessary for the exploitation of this vulnerability.

What is CVE-2023-21058?

The CVE-2023-21058 vulnerability in the Android system exposes a potential risk of unauthorized out of bounds write access, which could result in malicious actors executing remote code on the affected system. This could lead to severe security compromises and unauthorized control over the device.

The Impact of CVE-2023-21058

The impact of CVE-2023-21058 is significant as it allows threat actors to execute remote code on vulnerable Android systems without the need for user interaction. Such exploitation could result in data breaches, unauthorized system access, and potential compromise of sensitive information stored on the device.

Technical Details of CVE-2023-21058

The technical details of CVE-2023-21058 shed light on the vulnerability's description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability, located in the lcsm_SendRrAcquiAssist function of lcsm_bcm_assist.c, is categorized as an out of bounds write issue due to the absence of proper bounds checking. This flaw could be leveraged by threat actors to inject and execute arbitrary code remotely.

Affected Systems and Versions

The CVE-2023-21058 vulnerability affects the Android system specifically in the Android kernel. Systems running the affected Android kernel version are susceptible to the risks associated with this security flaw.

Exploitation Mechanism

Exploiting CVE-2023-21058 involves leveraging the out of bounds write vulnerability present in the lcsm_SendRrAcquiAssist function of lcsm_bcm_assist.c. Attackers could potentially craft malicious code to exploit this issue, allowing them to execute arbitrary commands on the target system.

Mitigation and Prevention

Understanding the potential risks posed by CVE-2023-21058, it is crucial to implement immediate steps to mitigate the vulnerability and ensure long-term security practices.

Immediate Steps to Take

To mitigate the risks associated with CVE-2023-21058, it is recommended to implement security measures such as restricting network access, monitoring system behavior for unusual activities, and implementing intrusion detection systems to detect potential exploitation attempts.

Long-Term Security Practices

To enhance overall system security and prevent future vulnerabilities, organizations should prioritize practices such as regular security audits, timely software updates, implementing secure coding practices, and conducting thorough security testing of applications and systems.

Patching and Updates

Vendor-provided patches and updates play a crucial role in addressing vulnerabilities like CVE-2023-21058. It is important for users to promptly apply patches released by the Android platform to mitigate the risks associated with this vulnerability and ensure the overall security of the system.