CVE-2022-39836 Explained : Impact and Mitigation

An issue was discovered in Connected Vehicle Systems Alliance (COVESA) dlt-daemon through 2.18.8. Due to a faulty DLT file parser, a crafted DLT file that crashes the process can be created. This is due to missing validation checks. There is a heap-based buffer over-read of one byte.

Understanding CVE-2022-39836

This section provides insights into the impact, technical details, and mitigation strategies related to CVE-2022-39836.

What is CVE-2022-39836?

The CVE-2022-39836 vulnerability lies in the Connected Vehicle Systems Alliance (COVESA) dlt-daemon software version through 2.18.8. It stems from a faulty DLT file parser, enabling the creation of a malicious DLT file leading to a process crash due to missing validation checks. Specifically, it results in a one-byte heap-based buffer over-read.

The Impact of CVE-2022-39836

The impact of CVE-2022-39836 is significant as it allows threat actors to exploit the vulnerability by crafting a specific DLT file. When executed, this malicious file can trigger a process crash by taking advantage of the missing validation checks. This could potentially lead to denial of service or other malicious activities.

Technical Details of CVE-2022-39836

In this section, we delve into the vulnerability description, affected systems, and the exploitation mechanism of CVE-2022-39836.

Vulnerability Description

The vulnerability in COVESA dlt-daemon allows for a heap-based buffer over-read of one byte, resulting from a faulty DLT file parser. The absence of proper validation checks facilitates the creation of a crafted DLT file that can cause the targeted process to crash.

Affected Systems and Versions

The CVE-2022-39836 vulnerability impacts Connected Vehicle Systems Alliance (COVESA) dlt-daemon versions up to 2.18.8. This means that systems running these versions are susceptible to the heap-based buffer over-read issue.

Exploitation Mechanism

To exploit CVE-2022-39836, threat actors can leverage the vulnerability by creating a specifically crafted DLT file. By inducing the target system to process this malicious file, attackers can trigger the heap-based buffer over-read, leading to a crash in the affected process.

Mitigation and Prevention

In this section, we outline immediate steps to take and long-term security practices to mitigate the risks associated with CVE-2022-39836.

Immediate Steps to Take

It is crucial to apply relevant security updates or patches provided by the vendor to address the CVE-2022-39836 vulnerability. Additionally, consider implementing network safeguards and monitoring mechanisms to detect anomalous activities.

Long-Term Security Practices

For long-term security enhancement, organizations should conduct regular security assessments, employ secure coding practices, and stay informed about potential vulnerabilities in software components. Emphasizing secure development lifecycles can help in preventing similar issues in the future.

Patching and Updates

Regularly check for updates or patches released by COVESA for the dlt-daemon software. Timely patching of software vulnerabilities is crucial in reducing the risk of exploitation and ensuring the security of connected vehicle systems.