CVE-2021-3917 coreos-installer < 0.10.0 writes world-readable Ignition config to installed system
Local attackers can read sensitive Ignition configuration data due to world-readable file permissions in the CoreOS installer.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-3917?
CVE-2021-3917 is a medium-severity vulnerability in coreos-installer, published on 23 Aug 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw was found in the coreos-installer, where it writes the Ignition config to the target system with world-readable access permissions. This flaw allows a local attacker to have read access to potentially sensitive data. The highest threat from this vulnerability is to confidentiality.
Weakness: CWE-276
Which versions are affected by CVE-2021-3917?
2 open source packages ship an affected version, including coreos-installer. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
coreos-installer crates.io | All versions | 0.10.0 |
coreos-installer crates.io | All versions | 0.10.0 |
Products include Redhat Coreos-Installer.
How do I fix CVE-2021-3917?
Upgrade coreos-installer to 0.10.0 or later.
Is CVE-2021-3917 being exploited?
There is no known exploitation of CVE-2021-3917 in the wild and no public exploit code.
Other vulnerabilities in coreos-installer
Sources
Also known as GHSA-862g-9h5m-m3qv.