CVE-2018-10689 : Exploit Details and Defense Strategies

A buffer overflow vulnerability in blktrace (Block IO Tracing) version 1.2.0 used in the Linux kernel and Android can lead to an invalid free operation due to inadequately sized device and devno arrays.

Understanding CVE-2018-10689

This CVE involves a buffer overflow issue in blktrace, impacting the Linux kernel and Android systems.

What is CVE-2018-10689?

The dev_map_read function in blktrace suffers from a buffer overflow due to undersized device and devno arrays, potentially leading to an invalid free operation when using the btt program with a crafted file.

The Impact of CVE-2018-10689

The vulnerability can be exploited to trigger a buffer overflow, potentially resulting in a denial of service or arbitrary code execution.

Technical Details of CVE-2018-10689

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The dev_map_read function in blktrace (Block IO Tracing) version 1.2.0 has a buffer overflow due to inadequately sized device and devno arrays.

Affected Systems and Versions

Linux kernel and Android systems utilizing blktrace version 1.2.0

Exploitation Mechanism

Crafted file input can trigger the buffer overflow, leading to an invalid free operation.

Mitigation and Prevention

Protecting systems from CVE-2018-10689 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply patches provided by the respective vendors to address the buffer overflow vulnerability.
Monitor vendor advisories and security alerts for updates and mitigation guidance.

Long-Term Security Practices

Regularly update software and systems to ensure the latest security patches are in place.
Implement secure coding practices to prevent buffer overflow vulnerabilities.

Patching and Updates

Refer to vendor-specific advisories such as Red Hat (RHSA-2019:2162) and Gentoo (GLSA-202107-15) for patching instructions and updates.