CVE-2022-40758 : Security Advisory and Response
Learn about CVE-2022-40758, a Buffer Access with Incorrect Length Value vulnerability in the TEE_CipherUpdate function of Samsung mTower, enabling DoS attacks. Understand the impact, affected systems, exploitation, and mitigation steps.
A Buffer Access with Incorrect Length Value vulnerability in the TEE_CipherUpdate function in Samsung mTower through 0.3.0 allows a trusted application to trigger a Denial of Service (DoS) by invoking the function with an excessive size value.
Understanding CVE-2022-40758
This CVE involves a vulnerability in the TEE_CipherUpdate function in Samsung mTower that can be exploited to cause a Denial of Service attack.
What is CVE-2022-40758?
The CVE-2022-40758 vulnerability specifically affects the TEE_CipherUpdate function in Samsung mTower through version 0.3.0. It enables a trusted application to induce a Denial of Service by using an overly large size value.
The Impact of CVE-2022-40758
The vulnerability can be misused by a trusted application to trigger a Denial of Service attack, potentially disrupting the normal operation of the system and causing downtime or service unavailability.
Technical Details of CVE-2022-40758
This section delves into specific technical aspects of the vulnerability.
Vulnerability Description
The vulnerability arises due to a Buffer Access with Incorrect Length Value in the TEE_CipherUpdate function, making it possible to abuse the function and cause a DoS condition.
Affected Systems and Versions
Samsung mTower versions up to and including 0.3.0 are impacted by this vulnerability.
Exploitation Mechanism
By calling the TEE_CipherUpdate function with an excessive size value for srcLen, a trusted application can exploit the vulnerability to launch a DoS attack.
Mitigation and Prevention
To address CVE-2022-40758, certain steps can be taken to mitigate the risks associated with this vulnerability.
Immediate Steps to Take
It is recommended to update Samsung mTower to a patched version that addresses the vulnerability. Additionally, enforcing input validation and boundary checks can help prevent exploitation.
Long-Term Security Practices
Incorporating secure coding practices and regularly monitoring for security updates and patches can enhance the overall security posture of systems.
Patching and Updates
Stay informed about security advisories from Samsung regarding mTower and promptly apply any released patches or updates to safeguard against known vulnerabilities.