# 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.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H`)
- **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:** Yes
- **Published:** 8 May 2024
- **Updated:** 1 Aug 2024
- **Also known as:** AZL-40343, AZL-66105, GHSA-p6mc-xxvv-r37f

## 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 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2024-1930?

It affects 1 product.


Products: Rpm-Software-Management Dnf5.

## How do I fix CVE-2024-1930?

Upgrade to a fixed version.

## Is CVE-2024-1930 being exploited?

There is no known exploitation of CVE-2024-1930 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-1930 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2024-1930 in the wild and no public exploit code.

Affected product: Fedora dnf5daemon-server. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2024-1930/ (Markdown: https://insights.sbomify.com/CVE-2024-1930/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-1930
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-1930
- OSV: https://osv.dev/vulnerability/CVE-2024-1930

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-1930/
Summaries are generated and may contain mistakes; the official description above is the record.