CVE-2024-1930 No Limit on Number of Open Sessions / Bad Session Close Behaviour
A malicious user can exhaust system memory and prevent new connections by creating unlimited sessions in dnf5daemon-server, causing a denial of service.
- 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-2024-1930?
CVE-2024-1930 is a medium-severity denial of service 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
No Limit on Number of Open Sessions / Bad Session Close Behaviour in dnf5daemon-server before 5.1.17 allows a malicious user to impact Availability via No Limit on Number of Open Sessions.
There is no limit on how many sessions D-Bus clients may create using the `open_session()` D-Bus method. For each session a thread is created in dnf5daemon-server. This spends a couple of hundred megabytes of memory in the process. Further connections will become impossible, likely because no more threads can be spawned by the D-Bus service.
Weakness: CWE-400
Which versions are affected by CVE-2024-1930?
It affects 1 product.
Products include Rpm-Software-Management Dnf5.
How do I fix CVE-2024-1930?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-1930 being exploited?
There is no known exploitation of CVE-2024-1930 in the wild and no public exploit code.
Sources
Also known as AZL-40343, AZL-66105, GHSA-p6mc-xxvv-r37f.