CVE-2019-13104 : Exploit Details and Defense Strategies

Das U-Boot versions 2016.11-rc1 through 2019.07-rc4 are susceptible to an underflow issue that can result in significant data corruption, potentially overwriting extensive data, including the entire stack, when interacting with a manipulated ext4 filesystem.

Understanding CVE-2019-13104

This CVE involves an underflow vulnerability in Das U-Boot versions, leading to potential data corruption and stack overwriting.

What is CVE-2019-13104?

An underflow issue in Das U-Boot versions from 2016.11-rc1 to 2019.07-rc4 can cause substantial data corruption, including overwriting a significant amount of data like the entire stack, particularly when handling a carefully manipulated ext4 filesystem.

The Impact of CVE-2019-13104

The vulnerability can lead to significant data corruption and potentially overwrite critical data, impacting system stability and security.

Technical Details of CVE-2019-13104

Das U-Boot underflow vulnerability details and affected systems.

Vulnerability Description

The vulnerability in Das U-Boot versions can trigger memcpy() to overwrite a large amount of data, including the entire stack, while processing a crafted ext4 filesystem.

Affected Systems and Versions

Das U-Boot versions 2016.11-rc1 through 2019.07-rc4

Exploitation Mechanism

The issue arises when interacting with a manipulated ext4 filesystem, leading to underflow and subsequent data corruption.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2019-13104.

Immediate Steps to Take

Update Das U-Boot to a patched version that addresses the underflow vulnerability.
Monitor vendor advisories and apply security patches promptly.

Long-Term Security Practices

Regularly update and patch all software components to prevent known vulnerabilities.
Implement secure coding practices to minimize the risk of similar underflow issues.

Patching and Updates

Apply patches provided by Das U-Boot to fix the underflow vulnerability and enhance system security.