CVE-2019-10220 Path traversal in kernel:

High 8.0 Published 27 Nov 2019 Updated 4 Aug 2024

Attackers can inject relative paths in CIFS directory entries, potentially reading or modifying files outside intended directories.

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

What is CVE-2019-10220?

CVE-2019-10220 is a high-severity path traversal vulnerability in Canonical Ubuntu Linux, published on 27 Nov 2019. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Linux kernel CIFS implementation, version 4.9.0 is vulnerable to a relative paths injection in directory entry lists.

Weakness: CWE-22

Which versions are affected by CVE-2019-10220?

It affects 3 products.

Linux distribution packages (6)

`kgraft-patch-SLE12-SP4_Update_8` SUSE:Linux Enterprise Live Patching 12 SP4	All versions	`3-2.1`
`kgraft-patch-SLE12-SP4_Update_9` SUSE:Linux Enterprise Live Patching 12 SP4	All versions	`2-2.1`
`kernel-livepatch-SLE15_Update_14` SUSE:Linux Enterprise Live Patching 15	All versions	`3-2.1`
`kernel-livepatch-SLE15_Update_15` SUSE:Linux Enterprise Live Patching 15	All versions	`3-2.1`
`kernel-livepatch-SLE15-SP1_Update_5` SUSE:Linux Enterprise Live Patching 15 SP1	All versions	`3-2.1`
`kernel-livepatch-SLE15-SP1_Update_6` SUSE:Linux Enterprise Live Patching 15 SP1	All versions	`3-2.1`

Products include Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel.

How do I fix CVE-2019-10220?

Apply the vendor's patch.

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

Is CVE-2019-10220 being exploited?

There is no known exploitation of CVE-2019-10220 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

All Canonical Ubuntu Linux vulnerabilities

Sources

Also known as DEBIAN-CVE-2019-10220, GHSA-539c-rp35-q667, SUSE-SU-2019:3019-1, SUSE-SU-2019:3216-1, SUSE-SU-2019:3255-1, UBUNTU-CVE-2019-10220.