CVE-2018-20671 Explained : Impact and Mitigation

An integer overflow vulnerability in GNU Binutils up to version 2.31.1 allows for a heap-based buffer overflow via a crafted section size.

Understanding CVE-2018-20671

This CVE involves an integer overflow vulnerability in the load_specific_debug_section function within objdump.c in GNU Binutils.

What is CVE-2018-20671?

This vulnerability arises from a flaw in GNU Binutils that can be exploited by providing a manipulated section size, leading to a heap-based buffer overflow.

The Impact of CVE-2018-20671

The vulnerability can be exploited to trigger a heap-based buffer overflow, potentially allowing an attacker to execute arbitrary code or crash the application.

Technical Details of CVE-2018-20671

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability in load_specific_debug_section function in objdump.c in GNU Binutils up to version 2.31.1 is due to an integer overflow issue.

Affected Systems and Versions

Affected Version: GNU Binutils up to version 2.31.1

Exploitation Mechanism

The vulnerability can be exploited by providing a crafted section size, which triggers a heap-based buffer overflow.

Mitigation and Prevention

Protecting systems from CVE-2018-20671 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor patches or updates promptly.
Monitor vendor advisories for security patches.
Implement least privilege access controls.

Long-Term Security Practices

Regularly update software and apply security patches.
Conduct security training for developers on secure coding practices.
Employ security tools for vulnerability scanning and monitoring.
Implement network segmentation to contain potential attacks.

Patching and Updates

Update GNU Binutils to version 2.31.1 or later to mitigate the vulnerability.