CVE-2017-7946 Explained : Impact and Mitigation

A crafted Mach0 file can lead to a denial of service and application crash in radare2 1.3.0 due to a use-after-free vulnerability.

Understanding CVE-2017-7946

What is CVE-2017-7946?

The vulnerability in the get_relocs_64 function in radare2 1.3.0 allows attackers to trigger a denial of service and application crash by exploiting a crafted Mach0 file.

The Impact of CVE-2017-7946

The vulnerability can result in a denial of service condition and application crash, posing a risk to the stability and availability of affected systems.

Technical Details of CVE-2017-7946

Vulnerability Description

The issue arises from the misuse of the get_relocs_64 function in the mach0.c file of radare2 1.3.0, leading to a use-after-free vulnerability.

Affected Systems and Versions

Product: radare2
Version: 1.3.0

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating a specially crafted Mach0 file to trigger the use-after-free condition, resulting in a denial of service and application crash.

Mitigation and Prevention

Immediate Steps to Take

Apply patches or updates provided by the vendor to address the vulnerability.
Avoid opening untrusted Mach0 files to mitigate the risk of exploitation.

Long-Term Security Practices

Regularly update software and systems to ensure the latest security patches are in place.
Implement proper input validation mechanisms to prevent malformed files from causing vulnerabilities.

Patching and Updates

It is crucial to apply the latest patches and updates released by radare2 to fix the vulnerability and enhance the security posture of the system.