CVE-2025-1893: open5gs — Exploit & Fix

Description

A vulnerability was found in Open5GS up to 2.7.2. It has been declared as problematic. Affected by this vulnerability is the function gmm_state_authentication of the file src/amf/gmm-sm.c of the component AMF. The manipulation leads to denial of service. The attack can be launched remotely. This vulnerability allows a single UE to crash the AMF, resulting in the complete loss of mobility and session management services and causing a network-wide outage. All registered UEs will lose connectivity, and new registrations will be blocked until the AMF is restarted, leading to a high availability impact. The exploit has been disclosed to the public and may be used. The patch is named e31e9965f00d9c744a7f728497cb4f3e97744ee8. It is recommended to apply a patch to fix this issue.

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CVSS v3.1 Score

4.3

MEDIUM

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

Weakness Type (CWE)

CWE-404 CWE-404

Affected Products

Vendor	Product	Versions
open5gs	open5gs	< 2.7.2

References

Advisories & Patches

https://github.com/open5gs/open5gs/commit/e31e9965f00d9c744a7f728497cb4f3e97744ee8

Exploits

https://github.com/open5gs/open5gs/issues/3707 https://github.com/open5gs/open5gs/issues/3707#issue-2833194192 https://github.com/open5gs/open5gs/issues/3707#issuecomment-2639620554 https://vuldb.com/?id.298411 https://github.com/open5gs/open5gs/issues/3707#issue-2833194192

Other References

https://vuldb.com/?ctiid.298411 https://vuldb.com/?submit.505952

Frequently Asked Questions

What is CVE-2025-1893? +

A vulnerability was found in Open5GS up to 2.7.2. It has been declared as problematic. Affected by this vulnerability is the function gmm_state_authentication of the file src/amf/gmm-sm.c of the component AMF. The manipulation leads to denial of service. The attack can be launched remotely. This vulnerability allows a single UE to crash the AMF, resulting in the complete loss of mobility and session management services and causing a network-wide outage. All registered UEs will lose connectivity, and new registrations will be blocked until the AMF is restarted, leading to a high availability impact. The exploit has been disclosed to the public and may be used. The patch is named e31e9965f00d9c744a7f728497cb4f3e97744ee8. It is recommended to apply a patch to fix this issue. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2025-1893? +

CVE-2025-1893 has a CVSS v3.1 score of 4.3 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-2025-1893? +

CVE-2025-1893 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-2025-1893? +

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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