PT-2025-23656 · Open5Gs · Open5Gs

Sq0409 · Published 2025-06-03 · Updated 2025-06-03 · CVE-2025-5520

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions Open5GS versions up to 2.7.3

Description A vulnerability was found in the function gmm state authentication/emm state authentication of the component AMF/MME. The manipulation leads to reachable assertion. It is possible to launch the attack remotely.

Recommendations For Open5GS versions up to 2.7.3, apply a patch to fix this issue, specifically the patch with the name 9f5d133657850e6167231527514ee1364d37a884. As a temporary workaround, consider disabling the gmm state authentication/emm state authentication function until a patch is available.

Exploit

Fix

Assertion Failure

Weakness Enumeration

CWE-617

Related Identifiers

CVE-2025-5520

Affected Products

Open5Gs

References · 12

• 🔥 https://github.com/open5gs/open5gs/issues/3910 · Exploit
• 🔥 https://github.com/open5gs/open5gs/issues/3910#issuecomment-2926719317 · Exploit
• 🔥❌ https://github.com/user-attachments/files/20362243/Problematic.handover.required.process.zip · Exploit, Deleted
• https://github.com/open5gs/open5gs/commit/9f5d133657850e6167231527514ee1364d37a884 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2025-5520 · Security Note
• https://osv.dev/vulnerability/CVE-2025-5520 · Vendor Advisory
• https://vuldb.com/?submit.582269 · Note
• https://vuldb.com/?id.310956 · Note
• https://vuldb.com/?ctiid.310956 · Note
• https://twitter.com/VulmonFeeds/status/1930042041544613910 · Twitter Post
• https://twitter.com/CVEnew/status/1929966861027872989 · Twitter Post
• https://t.me/cvetracker/25308 · Telegram Post