CVE-2017-16544 : Exploit Details and Defense Strategies

CVE-2017-16544, published on November 20, 2017, pertains to a vulnerability in the BusyBox software's tab autocomplete feature. This flaw allows for the execution of escape sequences within the terminal, potentially leading to code execution, arbitrary file writes, or other exploitations.

Understanding CVE-2017-16544

This CVE entry highlights a security issue within BusyBox versions up to 1.27.2, affecting the add_match function in the libbb/lineedit.c file.

What is CVE-2017-16544?

The vulnerability in the tab autocomplete feature of BusyBox allows malicious actors to manipulate filenames, leading to potential security breaches and unauthorized system access.

The Impact of CVE-2017-16544

The vulnerability enables attackers to execute arbitrary code, write to files without permission, and launch various types of attacks by exploiting the autocomplete feature's lack of proper filename sanitization.

Technical Details of CVE-2017-16544

This section delves into the specifics of the vulnerability.

Vulnerability Description

The add_match function in BusyBox's libbb/lineedit.c fails to sanitize filenames retrieved during tab autocomplete, enabling the execution of escape sequences within the terminal.

Affected Systems and Versions

Product: BusyBox
Vendor: N/A
Versions affected: Up to 1.27.2

Exploitation Mechanism

The vulnerability allows threat actors to inject malicious code or commands through filenames, exploiting the autocomplete feature to execute unauthorized actions.

Mitigation and Prevention

To address CVE-2017-16544, consider the following steps:

Immediate Steps to Take

Update BusyBox to a patched version that addresses the vulnerability.
Implement proper input validation and sanitization mechanisms in software to prevent similar exploits.

Long-Term Security Practices

Regularly monitor and update software components to mitigate potential vulnerabilities.
Conduct security audits and penetration testing to identify and address any existing weaknesses.

Patching and Updates

Stay informed about security advisories and patches released by BusyBox and related vendors.
Apply security updates promptly to ensure protection against known vulnerabilities.