CVE-2023-21644 : Exploit Details and Defense Strategies

This CVE-2023-21644 involves an issue of memory corruption in RIL due to Integer Overflow while triggering qcril_uim_request_apdu request.

Understanding CVE-2023-21644

This vulnerability affects Qualcomm's Snapdragon series across various platforms and versions, potentially leading to a high impact on confidentiality, integrity, and availability of the affected systems.

What is CVE-2023-21644?

The CVE-2023-21644 is a memory corruption vulnerability that occurs in RIL (Radio Interface Layer) due to an Integer Overflow when qcril_uim_request_apdu request is triggered. This could allow an attacker to exploit the vulnerability and potentially execute arbitrary code on the affected devices.

The Impact of CVE-2023-21644

The impact of this vulnerability is rated as medium severity, with a CVSS base score of 6.7. It has a high impact on confidentiality, integrity, and availability of the systems. The attack complexity is considered low, and the attack vector is local. Privileges required for exploitation are high.

Technical Details of CVE-2023-21644

This section provides detailed information on the vulnerability, including its description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability in RIL is triggered by an Integer Overflow, potentially leading to a buffer overflow. This can be exploited by attackers to compromise the affected devices.

Affected Systems and Versions

The CVE-2023-21644 affects multiple Qualcomm Snapdragon products and versions, including AQT1000, QCA6390, QCA6420, QCA6564, SD855, SDX55, and more. This vulnerability impacts a wide range of Qualcomm devices.

Exploitation Mechanism

The exploitation of this vulnerability involves manipulating the Integer Overflow in RIL to trigger a buffer overflow, leading to potential code execution or system compromise.

Mitigation and Prevention

To mitigate the risks associated with CVE-2023-21644, immediate steps should be taken, followed by long-term security practices and timely patching and updates.

Immediate Steps to Take

System administrators should apply patches provided by Qualcomm to address the vulnerability promptly.
Limiting access to potentially vulnerable services or ports can reduce the risk of exploitation.
Network segmentation and access controls can help contain potential attacks.

Long-Term Security Practices

Regular security assessments and penetration testing can help identify and address vulnerabilities proactively.
Security training and awareness programs for users can help prevent social engineering attacks that may exploit vulnerabilities.
Implementing robust security controls and monitoring mechanisms can enhance overall security posture.

Patching and Updates

It is crucial to monitor Qualcomm's security bulletins and apply patches and updates as soon as they are released. Keeping systems up to date with the latest security fixes is essential to protect against known vulnerabilities like CVE-2023-21644.