PT-2025-1403 · Open5Gs · Open5Gs Mme

Published 2024-02-02 · Updated 2025-01-23 · CVE-2023-37011

Positive Technologies (AI Summary)

CVSS v2.0

6.5

Medium

Base vector

AV:N/AC:L/Au:S/C:P/I:P/A:P

Name of the Vulnerable Software and Affected Versions Open5GS MME versions <= 2.6.4

Description The issue is related to an assertion that can be remotely triggered via a malformed ASN.1 packet over the S1AP interface. An attacker may send a "Handover Required" message missing a required MME UE S1AP ID field to repeatedly crash the MME, resulting in denial of service.

Recommendations For Open5GS MME versions <= 2.6.4, update to a version greater than 2.6.4 to resolve the issue. As a temporary workaround, consider restricting access to the S1AP interface to minimize the risk of exploitation. Avoid processing Handover Required messages missing the MME UE S1AP ID field until the issue is resolved.

Exploit

Fix

Assertion Failure

Weakness Enumeration

CWE-617

Related Identifiers

BDU:2025-13326

CVE-2023-37011

Affected Products

Open5Gs Mme

References · 7

• 🔥 https://cellularsecurity.org/ransacked · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2023-37011 · Security Note
• https://osv.dev/vulnerability/CVE-2023-37011 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-13326 · Security Note
• https://github.com/open5gs/open5gs/pull/2942 · Note
• https://vuldb.com/?id.292961 · Note
• https://twitter.com/CVEnew/status/1882300208429551916 · Twitter Post