CVE-2025-3931 Yggdrasil: local privilege escalation in yggdrasil
Local attackers can exploit missing authentication in Yggdrasil DBus methods to install arbitrary RPM packages, leading to privilege escalation.
- 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-2025-3931?
CVE-2025-3931 is a high-severity missing authorization vulnerability in Red Hat Enterprise Linux 10, published on 14 May 2025. 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 Yggdrasil, which acts as a system broker, allowing the processes to communicate to other children's "worker" processes through the DBus component. Yggdrasil creates a DBus method to dispatch messages to workers. However, it misses authentication and authorization checks, allowing every system user to call it. One available Yggdrasil worker acts as a package manager with capabilities to create and enable new repositories and install or remove packages.
This flaw allows an attacker with access to the system to leverage the lack of authentication on the dispatch message to force the Yggdrasil worker to install arbitrary RPM packages. This issue results in local privilege escalation, enabling the attacker to access and modify sensitive system data.
Weakness: CWE-280
Which versions are affected by CVE-2025-3931?
3 open source packages ship an affected version, including github.com/redhatinsights/yggdrasil.
| Package | Affected | Fixed in |
|---|---|---|
github.com/redhatinsights/yggdrasil Go | All versions | None |
github.com/redhatinsights/yggdrasil Go | All versions to 0.4.6 | None |
github.com/redhatinsights/yggdrasil Go | All versions to 0.4.6 | None |
How do I fix CVE-2025-3931?
Apply the vendor's patch.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-3931 being exploited?
There is no known exploitation of CVE-2025-3931 in the wild and no public exploit code.
Sources
Also known as GHSA-rpg2-jvhp-h354, GO-2025-3688.