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6.5

Magma <= 1.8.0 MME Crashes with Malformed S1AP Packet

CVE-2023-37039 · published 1 year ago
Summary

A security flaw in Magma's Mobile Management Entity can cause the system to crash if it receives a specific type of packet from the network. This could lead to service disruption and downtime. Update to version 1.9 or later to fix the issue.

Original advisory text
A Null pointer dereference vulnerability in the Mobile Management Entity (MME) in Magma <= 1.8.0 (fixed in v1.9 commit 08472ba98b8321f802e95f5622fa90fec2dea486) allow network-adjacent attackers to ...
A Null pointer dereference vulnerability in the Mobile Management Entity (MME) in Magma <= 1.8.0 (fixed in v1.9 commit 08472ba98b8321f802e95f5622fa90fec2dea486) allow network-adjacent attackers to crash the MME via an S1AP `Initial UE Message` packet missing an expected `RRC Establishment Clause` field.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
6.5 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-476NULL Pointer Dereference
Timeline
Published22 Jan 2025
Updated4 Nov 2026
First seen7 Mar 2026
Sources
CVE-2023-37039 · NVD
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