Global infos:

Open5GS MME versions <= 2.6.4 contain an assertion that can be remotely triggered via a malformed ASN.1 packet over the S1AP interface. An attacker may send an `Initial Context Setup Failure` message missing a required `MME_UE_S1AP_ID` field to repeatedly crash the MME, resulting in denial of service.

CVE Status: Awaiting Analysis

References:

[email protected]

Metrics:

Attribute	Value
Attack Complexity	LOW
Attack Vector	LOCAL
Availability Impact	LOW
Base Score	5.3
Base Severity	MEDIUM
Confidentiality Impact	LOW
Integrity Impact	LOW
Privileges Required	LOW
Scope	UNCHANGED
User Interaction	NONE
Vector String	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Exploitability Score	1.8
Impact Score	3.4
Source	134c704f-9b21-4f2e-91b3-4a467353bcc0
Type	Secondary

Links:

Exploit-db
Github