CVE-2019-13623 : Security Advisory and Response

A path traversal vulnerability in NSA Ghidra before version 9.1 allows attackers to overwrite files, potentially leading to arbitrary code execution.

Understanding CVE-2019-13623

This CVE involves a path traversal vulnerability in Ghidra, a software reverse engineering framework developed by the NSA.

What is CVE-2019-13623?

This vulnerability exists in the RestoreTask.java file within the ghidra.app.plugin.core.archive package. It arises when an archive contains an executable file with a filename starting with "../". Exploiting this flaw enables attackers to overwrite various files, particularly in scenarios where analysis results are shared.

The Impact of CVE-2019-13623

Exploiting this vulnerability can lead to the overwriting of critical Ghidra modules, such as the decompile module, potentially resulting in arbitrary code execution.

Technical Details of CVE-2019-13623

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The vulnerability allows attackers to overwrite files by manipulating the filenames within an archive, potentially leading to arbitrary code execution.

Affected Systems and Versions

NSA Ghidra before version 9.1

Exploitation Mechanism

Attackers can exploit this vulnerability by including an executable file with a specific filename structure in an archive, enabling them to overwrite files and potentially execute arbitrary code.

Mitigation and Prevention

Protecting systems from CVE-2019-13623 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Ghidra to version 9.1 or newer to mitigate the vulnerability.
Avoid opening or analyzing untrusted archives.

Long-Term Security Practices

Regularly update software and security patches.
Implement file access controls to restrict unauthorized modifications.

Patching and Updates

Ensure timely installation of security patches and updates to prevent exploitation of known vulnerabilities.