CVE-2019-12798 : Security Advisory and Response

Artifex MuJS 1.0.5 has a vulnerability in the regcompx function within the regexp.c file, allowing for a possible overflow in the parsed syntax list size.

Understanding CVE-2019-12798

What is CVE-2019-12798?

This CVE identifies a flaw in Artifex MuJS 1.0.5 that could lead to an overflow due to unrestricted regular expression program size.

The Impact of CVE-2019-12798

The vulnerability could be exploited to trigger an overflow, potentially leading to a denial of service or arbitrary code execution.

Technical Details of CVE-2019-12798

Vulnerability Description

The regcompx function in regexp.c lacks restrictions on the regular expression program size, allowing for a possible overflow in the parsed syntax list size.

Affected Systems and Versions

Product: Artifex MuJS 1.0.5
Vendor: Artifex
Version: 1.0.5

Exploitation Mechanism

The lack of size restrictions on the regular expression program in regcompx can be exploited by an attacker to cause an overflow in the parsed syntax list size.

Mitigation and Prevention

Immediate Steps to Take

Apply vendor patches or updates provided to address the vulnerability.
Monitor vendor communications for security advisories and follow recommended actions.

Long-Term Security Practices

Regularly update software and libraries to the latest versions.
Implement code reviews and security testing to identify and address vulnerabilities.

Patching and Updates

Ensure timely installation of patches and updates released by Artifex to fix the vulnerability.