CVE-2019-12173 : Security Advisory and Response

MacDown 0.7.1 (870) allows remote code execution via a file:\ URI with a .app pathname in the HREF attribute of an A element. This vulnerability is distinct from CVE-2019-12138.

Understanding CVE-2019-12173

This CVE involves a remote code execution vulnerability in MacDown 0.7.1 (870) when using a specific file URI.

What is CVE-2019-12173?

CVE-2019-12173 is a security vulnerability in MacDown 0.7.1 (870) that enables remote code execution by exploiting a file URI with a .app pathname in the HREF attribute of an A element.

The Impact of CVE-2019-12173

The vulnerability allows attackers to execute arbitrary code remotely, potentially leading to unauthorized access, data theft, and system compromise.

Technical Details of CVE-2019-12173

MacDown 0.7.1 (870) is susceptible to remote code execution due to improper handling of file URIs.

Vulnerability Description

By using a file:\ URI with a .app pathname in the HREF attribute of an A element, attackers can execute malicious code on the target system.

Affected Systems and Versions

Product: MacDown
Version: 0.7.1 (870)

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting a malicious file URI with a .app pathname in a specific HTML element.

Mitigation and Prevention

To address CVE-2019-12173, follow these mitigation strategies:

Immediate Steps to Take

Avoid clicking on suspicious links or opening files from untrusted sources.
Update MacDown to the latest version to patch the vulnerability.

Long-Term Security Practices

Regularly update software and applications to prevent known vulnerabilities.
Implement proper HTML sanitization to mitigate risks associated with file URIs.

Patching and Updates

Ensure that MacDown is updated to the latest version to eliminate the vulnerability and enhance system security.