CVE-2018-3968 Security feature bypass in Das U-Boot
A local attacker can bypass U-Boot's verified boot protection to execute an unsigned kernel, compromising system integrity.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-3968?
CVE-2018-3968 is a high-severity vulnerability in Das U-Boot, published on 21 Mar 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An exploitable vulnerability exists in the verified boot protection of the Das U-Boot from version 2013.07-rc1 to 2014.07-rc2. The affected versions lack proper FIT signature enforcement, which allows an attacker to bypass U-Boot's verified boot and execute an unsigned kernel, embedded in a legacy image format. To trigger this vulnerability, a local attacker needs to be able to supply the image to boot.
Weakness: CWE-347
Which versions are affected by CVE-2018-3968?
It affects 1 product.
Products include Denx U-Boot.
How do I fix CVE-2018-3968?
Upgrade to a fixed version.
Is CVE-2018-3968 being exploited?
There is no known exploitation of CVE-2018-3968 in the wild and no public exploit code.
Other vulnerabilities in Das U-Boot
Sources
Also known as DEBIAN-CVE-2018-3968, GHSA-xjmf-xr2j-gfx7.