Denial of Service Vulnerability in Open5GS MME by Cellular Security
CVE-2023-37020

8.6HIGH

Key Information:

Vendor

Open5GS

Status
Open5GS MME
Vendor
CVE Published:
22 January 2025

What is CVE-2023-37020?

The Open5GS MME component in versions prior to 2.6.4 has a significant vulnerability that allows remote attackers to trigger an assertion failure by sending malformed ASN.1 packets over the S1AP interface. By exploiting this vulnerability with a specifically crafted 'UE Context Release Complete' message that omits the mandatory 'MME_UE_S1AP_ID' field, an attacker can cause the MME to crash repeatedly, leading to disruptions in service availability. It is crucial for users of affected versions to update to mitigate this risk.

References

https://cellularsecurity.org/ransacked

CVSS V3.1

Score:
8.6
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.