CVE-2025-9405: open5gs — Exploit & Fix

Description

A security flaw has been discovered in Open5GS up to 2.7.5. The impacted element is the function gmm_state_exception of the file src/amf/gmm-sm.c. The manipulation results in reachable assertion. It is possible to launch the attack remotely. The exploit has been released to the public and may be exploited. The patch is identified as 8e5fed16114f2f5e40bee1b161914b592b2b7b8f. Applying a patch is advised to resolve this issue.

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CVSS v3.1 Score

5.3

MEDIUM

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

Weakness Type (CWE)

CWE-617 CWE-617

Affected Products

Vendor	Product	Versions
open5gs	open5gs	< 2.7.6

References

Advisories & Patches

https://github.com/open5gs/open5gs/commit/8e5fed16114f2f5e40bee1b161914b592b2b7b8f

Exploits

https://github.com/open5gs/open5gs/issues/3947 https://github.com/open5gs/open5gs/issues/3947

Other References

https://github.com/ZHENGHAOHELLO/BugReport/blob/main/CVE-2025-9405 https://github.com/open5gs/open5gs/issues/3947#issuecomment-3029992728 https://github.com/user-attachments/files/21013084/amf_udm-uecm.zip https://vuldb.com/?ctiid.321241 https://vuldb.com/?id.321241 https://vuldb.com/?submit.633467 https://github.com/open5gs/open5gs/issues/3947#issuecomment-3029992728 https://vuldb.com/?submit.633467

Frequently Asked Questions

What is CVE-2025-9405? +

A security flaw has been discovered in Open5GS up to 2.7.5. The impacted element is the function gmm_state_exception of the file src/amf/gmm-sm.c. The manipulation results in reachable assertion. It is possible to launch the attack remotely. The exploit has been released to the public and may be exploited. The patch is identified as 8e5fed16114f2f5e40bee1b161914b592b2b7b8f. Applying a patch is advised to resolve this issue. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-9405? +

CVE-2025-9405 has a CVSS v3.1 score of 5.3 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-2025-9405? +

CVE-2025-9405 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-2025-9405? +

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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