Memory corruption via unchecked session.dnn copy
Published Jun 18, 2025 · Updated Jun 20, 2025
Buffer overflow in the Open5GS PFCP library 2.7.2 and earlier allows local users to corrupt SMF or UPF memory via session.dnn. The ogs_pfcp_subnet_add function passes the configuration value to strcpy without checking whether it fits the fixed-size dnn buffer, overwriting adjacent fields when it exceeds 101 characters. Exploitation requires local ability to modify SMF or UPF configuration, and the public demonstration overwrites adjacent structure fields rather than establishing code execution.
Summary
What happened
Buffer overflow in the Open5GS PFCP library 2.7.2 and earlier allows local users to corrupt SMF or UPF memory via session.dnn. The ogs_pfcp_subnet_add function passes the configuration value to strcpy without checking whether it fits the fixed-size dnn buffer, overwriting adjacent fields when it exceeds 101 characters. Exploitation requires local ability to modify SMF or UPF configuration, and the public demonstration overwrites adjacent structure fields rather than establishing code execution.
The record
- CVE
- CVE-2025-44952
- Published
- Jun 18, 2025
- Updated
- Jun 20, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-120
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 18, 2025CVE publishedPublication date reported by the CVE source.
- Jun 20, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What conditions does exploitation require?
What is affected?
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Published CVSS scores
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Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Open5GS PFCP oversized DNN reproductionproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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