CVE-2019-8308 Path traversal in n/a

High 8.2 Published 12 Feb 2019 Updated 4 Aug 2024

Attackers can modify host executables via exposed /proc in Flatpak sandbox, enabling code execution and privilege escalation.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2019-8308?

CVE-2019-8308 is a high-severity path traversal vulnerability in Debian Debian Linux, published on 12 Feb 2019. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Flatpak before 1.0.7, and 1.1.x and 1.2.x before 1.2.3, exposes /proc in the apply_extra script sandbox, which allows attackers to modify a host-side executable file.

Weakness: CWE-668

Which versions are affected by CVE-2019-8308?

It affects 8 products.

Linux distribution packages (20)

`flatpak` Red Hat:enterprise_linux:7::client	All versions	`0:1.0.2-4.el7_6`
`flatpak-builder` Red Hat:enterprise_linux:7::client	All versions	`0:1.0.0-4.el7_6`
`flatpak-debuginfo` Red Hat:enterprise_linux:7::client	All versions	`0:1.0.2-4.el7_6`
`flatpak-devel` Red Hat:enterprise_linux:7::client	All versions	`0:1.0.2-4.el7_6`
`flatpak-libs` Red Hat:enterprise_linux:7::client	All versions	`0:1.0.2-4.el7_6`
`flatpak` Red Hat:enterprise_linux:7::computenode	All versions	`0:1.0.2-4.el7_6`
`flatpak-builder` Red Hat:enterprise_linux:7::computenode	All versions	`0:1.0.0-4.el7_6`
`flatpak-debuginfo` Red Hat:enterprise_linux:7::computenode	All versions	`0:1.0.2-4.el7_6`
`flatpak-devel` Red Hat:enterprise_linux:7::computenode	All versions	`0:1.0.2-4.el7_6`
`flatpak-libs` Red Hat:enterprise_linux:7::computenode	All versions	`0:1.0.2-4.el7_6`
`flatpak` Red Hat:enterprise_linux:7::server	All versions	`0:1.0.2-4.el7_6`
`flatpak-builder` Red Hat:enterprise_linux:7::server	All versions	`0:1.0.0-4.el7_6`
`flatpak-debuginfo` Red Hat:enterprise_linux:7::server	All versions	`0:1.0.2-4.el7_6`
`flatpak-devel` Red Hat:enterprise_linux:7::server	All versions	`0:1.0.2-4.el7_6`
`flatpak-libs` Red Hat:enterprise_linux:7::server	All versions	`0:1.0.2-4.el7_6`
`flatpak` Red Hat:enterprise_linux:7::workstation	All versions	`0:1.0.2-4.el7_6`
`flatpak-builder` Red Hat:enterprise_linux:7::workstation	All versions	`0:1.0.0-4.el7_6`
`flatpak-debuginfo` Red Hat:enterprise_linux:7::workstation	All versions	`0:1.0.2-4.el7_6`
`flatpak-devel` Red Hat:enterprise_linux:7::workstation	All versions	`0:1.0.2-4.el7_6`
`flatpak-libs` Red Hat:enterprise_linux:7::workstation	All versions	`0:1.0.2-4.el7_6`

Products include Debian Debian Linux, Flatpak Flatpak, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus, Redhat Enterprise Linux Server Eus and 2 more.

How do I fix CVE-2019-8308?

Upgrade to a fixed version.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2019-8308 being exploited?

There is no known exploitation of CVE-2019-8308 in the wild and no public exploit code.

All Debian Debian Linux vulnerabilities

Sources

Also known as DEBIAN-CVE-2019-8308, DSA-4390-1, GHSA-26wh-22xw-qfqx, RHSA-2019:0375, UBUNTU-CVE-2019-8308.