CVE-2023-37029Public exploitNetwork attack vector

Service crashes via oversized NAS packet assertion

Published Jan 21, 2025 · Updated Jan 23, 2025

Reachable assertion in Magma MME 1.8.0 and earlier allows remote attackers to crash the service with an oversized NAS packet. The s1ap_mme_itti_s1ap_initial_ue_message routine calls AssertFatal when nas_msg_length reaches 1,000 bytes instead of rejecting the input. A compromised base station or an unauthenticated cellphone within radio range can repeat the packet to interrupt cellular service.

CVSS severity7.5
High
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reachable assertion in Magma MME 1.8.0 and earlier allows remote attackers to crash the service with an oversized NAS packet. The s1ap_mme_itti_s1ap_initial_ue_message routine calls AssertFatal when nas_msg_length reaches 1,000 bytes instead of rejecting the input. A compromised base station or an unauthenticated cellphone within radio range can repeat the packet to interrupt cellular service.

The record

CVE
CVE-2023-37029
Published
Jan 21, 2025
Updated
Jan 23, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-617, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Jan 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-617Reachable Assertion
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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