CVE-2019-18178 : Security Advisory and Response

Real Time Engineers' FreeRTOS+FAT version 160919a is affected by a use after free vulnerability in the FF_Close() function, potentially leading to security issues.

Understanding CVE-2019-18178

This CVE identifies a specific vulnerability in the FreeRTOS+FAT software version 160919a.

What is CVE-2019-18178?

The vulnerability lies in the FF_Close() function within the file ff_file.c, where the file handler pxFile is released using the ffconfigFREE function, leading to a use after free scenario.

The Impact of CVE-2019-18178

Exploitation of this vulnerability could allow an attacker to execute arbitrary code, potentially compromising the integrity and confidentiality of the system.

Technical Details of CVE-2019-18178

FreeRTOS+FAT version 160919a is susceptible to a use after free vulnerability.

Vulnerability Description

The issue arises when the file handler pxFile is freed using ffconfigFREE but later reused to flush modified file content to disk, creating a potential security risk.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Version: Not applicable

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the reused file handler to execute malicious code, compromising system security.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of CVE-2019-18178.

Immediate Steps to Take

Update to a patched version of FreeRTOS+FAT to mitigate the vulnerability.
Monitor vendor communications for security advisories and patches.

Long-Term Security Practices

Regularly update software and firmware to ensure the latest security patches are applied.
Implement secure coding practices to prevent similar vulnerabilities in the future.

Patching and Updates

Apply patches provided by Real Time Engineers to address the use after free vulnerability in FreeRTOS+FAT version 160919a.