CVE-2024-1929 Local Root Exploit via Configuration Dictionary
A local attacker can escalate privileges to root by manipulating D-Bus configuration parameters in dnf5daemon-server to load malicious shared libraries.
- 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-2024-1929?
CVE-2024-1929 is a high-severity vulnerability in Fedora dnf5daemon-server, published on 8 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Local Root Exploit via Configuration Dictionary in dnf5daemon-server before 5.1.17 allows a malicious user to impact Confidentiality and Integrity via Configuration Dictionary.
There are issues with the D-Bus interface long before Polkit is invoked. The `org.rpm.dnf.v0.SessionManager.open_session` method takes a key/value map of configuration entries. A sub-entry in this map, placed under the "config" key, is another key/value map. The configuration values found in it will be forwarded as configuration overrides to the `libdnf5::Base` configuration.
Practically all libdnf5 configuration aspects can be influenced here. Already when opening the session via D-Bus, the libdnf5 will be initialized using these override configuration values. There is no sanity checking of the content of this "config" map, which is untrusted data. It is possible to make the library loading a plug-in shared library under control of an unprivileged user, hence achieving root access.
Weakness: CWE-20
Which versions are affected by CVE-2024-1929?
It affects 1 product.
Products include Rpm Dnf5.
How do I fix CVE-2024-1929?
Upgrade to a fixed version.
Is CVE-2024-1929 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-1929 exists.
Sources
Also known as AZL-40340, GHSA-px8m-3p25-24qw.