CVE-2019-8308 : Security Advisory and Response

Flatpak before version 1.0.7, as well as versions 1.1.x and 1.2.x before 1.2.3, has a vulnerability where the apply_extra script sandbox exposes the /proc directory, allowing malicious actors to manipulate an executable file on the host-side.

Understanding CVE-2019-8308

Flatpak vulnerability exposing /proc directory.

What is CVE-2019-8308?

Flatpak versions prior to 1.0.7 and 1.1.x/1.2.x before 1.2.3 have a security flaw in the apply_extra script sandbox, enabling unauthorized modification of host-side executable files.

The Impact of CVE-2019-8308

This vulnerability permits attackers to tamper with executable files on the host system, potentially leading to unauthorized access or malicious code execution.

Technical Details of CVE-2019-8308

Flatpak vulnerability specifics.

Vulnerability Description

The apply_extra script sandbox in Flatpak exposes the /proc directory, facilitating unauthorized manipulation of host-side executable files.

Affected Systems and Versions

Flatpak versions before 1.0.7
Flatpak 1.1.x and 1.2.x versions before 1.2.3

Exploitation Mechanism

Malicious actors can exploit this vulnerability to modify executable files on the host system, potentially compromising system integrity.

Mitigation and Prevention

Steps to address and prevent CVE-2019-8308.

Immediate Steps to Take

Update Flatpak to version 1.0.7 or newer
Apply patches provided by the vendor
Monitor system for any unauthorized changes

Long-Term Security Practices

Regularly update software and apply security patches
Implement least privilege access controls
Conduct security audits and vulnerability assessments

Patching and Updates

Install the latest Flatpak version (1.0.7 or above)
Follow security advisories from vendors and apply recommended patches