CVE-2017-7227 : Vulnerability Insights and Analysis

The GNU Binutils version 2.28 contains a vulnerability in the GNU linker (ld) that can be exploited through a heap-based buffer overflow.

Understanding CVE-2017-7227

This CVE entry pertains to a specific vulnerability found in the GNU linker (ld) within GNU Binutils version 2.28.

What is CVE-2017-7227?

The vulnerability in the GNU linker (ld) allows for a heap-based buffer overflow when processing an invalid input script, resulting in a program crash. The issue stems from the absence of '\0' termination in the name field of ldlex.l.

The Impact of CVE-2017-7227

The vulnerability can be exploited by an attacker to crash the program by providing a malicious input script, potentially leading to denial of service or arbitrary code execution.

Technical Details of CVE-2017-7227

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability in the GNU linker (ld) of GNU Binutils 2.28 arises from a heap-based buffer overflow triggered by processing an invalid input script.

Affected Systems and Versions

Affected Version: GNU Binutils version 2.28
Systems using the GNU linker (ld) are vulnerable to this issue.

Exploitation Mechanism

The vulnerability is exploited by providing a crafted input script that lacks proper termination in the name field of ldlex.l, causing a buffer overflow.

Mitigation and Prevention

Protecting systems from CVE-2017-7227 involves taking immediate steps and implementing long-term security practices.

Immediate Steps to Take

Update GNU Binutils to a patched version that addresses the vulnerability.
Avoid processing untrusted or unknown input scripts with the GNU linker (ld).

Long-Term Security Practices

Regularly monitor for security advisories and updates related to GNU Binutils.
Implement input validation mechanisms to prevent malformed scripts from being processed.

Patching and Updates

Apply patches provided by the software vendor to fix the vulnerability in the GNU linker (ld).