CVE-2025-25774: open5gs — Exploit & Fix

Description

An issue was discovered in Open5GS v2.7.2. When a UE switches between two gNBs and sends a handover request at a specific time, it may cause an exception in the AMF's internal state machine, leading to an AMF crash and resulting in a Denial of Service (DoS).

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CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-691 CWE-691

Affected Products

Vendor	Product	Versions
open5gs	open5gs	All

References

Advisories & Patches

https://github.com/open5gs/open5gs/commit/2e68706f1eea029d5172ccad946e78b352c031d0 https://github.com/open5gs/open5gs/issues/3671

Exploits

https://github.com/guoweifk/BugReport/blob/main/Open5GS%20AMF%20Denial%20of%20Service%20via%20GMM%20State%20Handling%20in%20Handover https://github.com/open5gs/open5gs/issues/3671

Frequently Asked Questions

What is CVE-2025-25774? +

An issue was discovered in Open5GS v2.7.2. When a UE switches between two gNBs and sends a handover request at a specific time, it may cause an exception in the AMF's internal state machine, leading to an AMF crash and resulting in a Denial of Service (DoS). It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2025-25774? +

CVE-2025-25774 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-25774? +

CVE-2025-25774 affects products from open5gs, specifically: open5gs. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-25774? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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