Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://access.redhat.com/errata/RHSA-2025:7592
- https://access.redhat.com/security/cve/CVE-2025-3931
- https://bugzilla.redhat.com/show_bug.cgi?id=2362345
- https://github.com/RedHatInsights/yggdrasil/pull/336
FAQ
What is CVE-2025-3931?
CVE-2025-3931 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 t...
How severe is CVE-2025-3931?
CVE-2025-3931 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-3931?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.