CVE-2017-7358 Path traversal in n/a
Local attackers can escalate privileges to root via directory traversal in LightDM guest account script during logout.
- 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-2017-7358?
CVE-2017-7358 is a high-severity path traversal vulnerability in Canonical Ubuntu Linux, published on 5 Apr 2017. 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
In LightDM through 1.22.0, a directory traversal issue in debian/guest-account.sh allows local attackers to own arbitrary directory path locations and escalate privileges to root when the guest user logs out.
Weakness: CWE-22
Which versions are affected by CVE-2017-7358?
It affects 2 products.
Products include Canonical Ubuntu Linux, Lightdm Project Lightdm.
How do I fix CVE-2017-7358?
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-2017-7358 being exploited?
There is no known exploitation of CVE-2017-7358 in the wild and no public exploit code.
Public exploit code: 1 Exploit-DB entry and 1 proofs of concept on GitHub.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as GHSA-487j-vfqw-h49x, UBUNTU-CVE-2017-7358, USN-3255-1.