What’s Vulnerable › Vulnerabilities

CVE-2024-1930: No Limit on Number of Open Sessions / Bad Session Close Behaviour

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-05-08 · updated 2026-06-17
• Weakness: CWE-400

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.

Affected products

• rpm-software-management Dnf5: before 5.1.17 — fixed in 5.1.17

How to fix

Upgrade to a fixed version: rpm-software-management Dnf5 5.1.17. Check the vendor advisory for mitigations.

References

• https://www.openwall.com/lists/oss-security/2024/03/04/2
• https://www.openwall.com/lists/oss-security/2024/03/04/2

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