CVE-2023-37027

Service crash via missing S1AP identifier

Published Jan 21, 2025 · Updated Mar 18, 2025

Null pointer dereference in Magma MME 1.8.0 and earlier allows network-adjacent attackers to crash the service via malformed S1AP input. The s1ap_mme_handle_erab_modification_indication handler reads a required UE identifier after its information-element lookup returns null. Reachability requires base-station access to the S1 interface or equivalent access to its protected transport; the bounded consequence is an MME process crash and cellular-service interruption.

CVSS severity6.5
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Null pointer dereference in Magma MME 1.8.0 and earlier allows network-adjacent attackers to crash the service via malformed S1AP input. The s1ap_mme_handle_erab_modification_indication handler reads a required UE identifier after its information-element lookup returns null. Reachability requires base-station access to the S1 interface or equivalent access to its protected transport; the bounded consequence is an MME process crash and cellular-service interruption.

The record

CVE
CVE-2023-37027
Published
Jan 21, 2025
Updated
Mar 18, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499.004
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 18, 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 vectoradjacent
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.7CISA-ADPCVSS:3.1/AV:A/AC:L/PR:L/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)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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