CVE-2023-21077 : Vulnerability Insights and Analysis

This CVE-2023-21077 information details a vulnerability found in the Android system that could potentially lead to a local escalation of privilege with System execution privileges required. The vulnerability exists in the rtt_unpack_xtlv_cbfn function within the dhd_rtt.c file, posing a risk of an out-of-bounds write due to buffer overflow. Notably, the exploitation of this vulnerability does not necessitate user interaction.

Understanding CVE-2023-21077

This section will delve deeper into the nature of CVE-2023-21077, outlining the impact, technical details, and mitigation strategies associated with this security issue.

What is CVE-2023-21077?

CVE-2023-21077 is a vulnerability identified in a specific function within the Android system, which could potentially allow attackers to locally escalate privileges without requiring user interaction. The specific function, rtt_unpack_xtlv_cbfn within the dhd_rtt.c file, is susceptible to a buffer overflow leading to an out-of-bounds write.

The Impact of CVE-2023-21077

The impact of CVE-2023-21077 lies in the potential for malicious actors to exploit the vulnerability to elevate their privilege levels within the Android system, ultimately gaining unauthorized access and control. This could have severe consequences in compromising the security and integrity of affected systems.

Technical Details of CVE-2023-21077

In this section, we will delve into the technical aspects of CVE-2023-21077, including the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability in CVE-2023-21077 stems from an out-of-bounds write due to a buffer overflow in the rtt_unpack_xtlv_cbfn function within the dhd_rtt.c file. This flaw can be exploited by attackers to achieve local privilege escalation, posing a significant security risk.

Affected Systems and Versions

The vulnerable function exists in the Android kernel, impacting various versions of the Android operating system. Specifically, the Android kernel is identified as the affected product with the status "affected."

Exploitation Mechanism

To exploit CVE-2023-21077, attackers can leverage the buffer overflow vulnerability in the rtt_unpack_xtlv_cbfn function to write outside the bounds of allocated memory. This malicious activity can result in unauthorized privilege elevation within the Android system.

Mitigation and Prevention

Mitigating CVE-2023-21077 requires immediate action to address the vulnerability and prevent potential exploitation. Implementing both short-term and long-term security practices is essential to safeguard affected systems.

Immediate Steps to Take

Users and administrators should apply security patches provided by the Android platform to address CVE-2023-21077.
Monitor system activity for any signs of unauthorized privilege escalation or suspicious behavior that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update the Android system to ensure all security patches and fixes are up to date.
Conduct security assessments and penetration testing to identify and remediate potential vulnerabilities within the environment.

Patching and Updates

Android has released security patches addressing CVE-2023-21077. It is crucial for users to promptly apply these patches to eliminate the vulnerability and enhance the overall security posture of their systems.