CVE-2023-21494 : Exploit Details and Defense Strategies

This CVE-2023-21494 information discloses a potential buffer overflow vulnerability in the authentication API within mm_Authentication.c in the Shannon baseband prior to SMR May-2023 Release 1. This vulnerability may allow remote attackers to trigger invalid memory access.

Understanding CVE-2023-21494

This section provides insight into the nature and impact of CVE-2023-21494.

What is CVE-2023-21494?

CVE-2023-21494 is a buffer overflow vulnerability found in the authentication API within mm_Authentication.c in the Shannon baseband before SMR May-2023 Release 1. This flaw can be exploited by remote attackers to cause invalid memory access.

The Impact of CVE-2023-21494

The impact of CVE-2023-21494 is rated as medium severity. This vulnerability can be exploited by attackers over a network with high complexity, without the need for privileges or user interaction. While the confidentiality, integrity, and availability impacts are rated as low, the base score is 5.6.

Technical Details of CVE-2023-21494

This section delves into the technical aspects of CVE-2023-21494.

Vulnerability Description

CVE-2023-21494 is categorized as a buffer overflow vulnerability, specifically related to improper input validation (CWE-20). The vulnerability lies within the auth API in mm_Authentication.c in the Shannon baseband.

Affected Systems and Versions

The vulnerability impacts select devices utilizing Exynos CP chipsets within Samsung Mobile devices. Systems running versions less than SMR May-2023 Release 1 are affected by this vulnerability.

Exploitation Mechanism

Remote attackers can exploit this vulnerability remotely to cause invalid memory access, potentially leading to unauthorized actions or system compromise.

Mitigation and Prevention

Here are the steps to mitigate and prevent the exploitation of CVE-2023-21494.

Immediate Steps to Take

Ensure that affected systems are updated to SMR May-2023 Release 1 or later.
Monitor security advisories from Samsung Mobile for patches and updates related to this vulnerability.
Implement network security measures to prevent remote attacks targeting the authentication API.

Long-Term Security Practices

Regularly update firmware and software on Samsung Mobile devices to mitigate potential vulnerabilities.
Conduct routine security assessments to detect and address any security weaknesses proactively.

Patching and Updates

Stay informed about security updates and patches released by Samsung Mobile for addressing CVE-2023-21494 and other potential vulnerabilities on affected devices. Regularly applying these updates can help maintain the security of the devices and prevent exploitation of known vulnerabilities.