CVE-2019-16718 : Security Advisory and Response

In versions prior to 3.9.0, radare2 exhibits a vulnerability in bin_symbols() function located in libr/core/cbin.c, resulting in command injection. By exploiting a specially designed executable file, an attacker can execute unauthorized shell commands using the victim's privileges. This vulnerability arises from an inadequate resolution for CVE-2019-14745 and improper treatment of symbol names embedded within executables.

Understanding CVE-2019-16718

In radare2 before 3.9.0, a command injection vulnerability exists in bin_symbols() in libr/core/cbin.c. By using a crafted executable file, it's possible to execute arbitrary shell commands with the permissions of the victim. This vulnerability is due to an insufficient fix for CVE-2019-14745 and improper handling of symbol names embedded in executables.

What is CVE-2019-16718?

The vulnerability in radare2 before version 3.9.0 allows attackers to execute unauthorized shell commands by exploiting a flaw in the bin_symbols() function.

The Impact of CVE-2019-16718

Attackers can execute arbitrary shell commands with the victim's permissions.
Unauthorized access to sensitive information and system compromise are possible consequences.

Technical Details of CVE-2019-16718

Vulnerability Description

The vulnerability lies in the bin_symbols() function in libr/core/cbin.c, enabling command injection through specially crafted executable files.

Affected Systems and Versions

Versions prior to 3.9.0 of radare2 are affected by this vulnerability.

Exploitation Mechanism

Attackers exploit the inadequate fix for CVE-2019-14745 and mishandling of symbol names in executables to inject and execute unauthorized shell commands.

Mitigation and Prevention

Immediate Steps to Take

Update radare2 to version 3.9.0 or later to mitigate the vulnerability.
Avoid executing untrusted executable files to prevent exploitation.

Long-Term Security Practices

Regularly update software and apply security patches to address known vulnerabilities.
Implement least privilege access controls to limit the impact of potential attacks.

Patching and Updates

Stay informed about security advisories and promptly apply patches released by the vendor to enhance system security.