CVE-2023-37013Network attack vector

Unauthenticated crash via oversized S1AP message

Published Jan 22, 2025 · Updated Jan 23, 2025

Reachable assertion in Open5GS MME 2.6.4 and earlier allows remote attackers to crash the MME via an oversized S1AP message. The s1ap_recv_handler routine treats a non-EAGAIN failure from ogs_sctp_recvmsg as an impossible state and invokes a fatal assertion instead of handling the oversized input. S1AP reachability is required; the published threat model includes unauthenticated mobile devices without a SIM and Internet paths through Wi-Fi Calling, and repeated packets can persistently interrupt cellular service.

CVSS severity7.3
High
EPSS probability0.53%
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 Open5GS MME 2.6.4 and earlier allows remote attackers to crash the MME via an oversized S1AP message. The s1ap_recv_handler routine treats a non-EAGAIN failure from ogs_sctp_recvmsg as an impossible state and invokes a fatal assertion instead of handling the oversized input. S1AP reachability is required; the published threat model includes unauthenticated mobile devices without a SIM and Internet paths through Wi-Fi Calling, and repeated packets can persistently interrupt cellular service.

The record

CVE
CVE-2023-37013
Published
Jan 22, 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 22, 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

7.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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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