CVE-2024-34475Network attack vector

AMF crash via reachable NAS assertion

Published May 4, 2024 · Updated Aug 2, 2024

Reachable assertion in the AMF in Open5GS before 2.7.1 allows remote attackers to crash the AMF via a sequence of NAS messages. The gmm_state_authentication handler in src/amf/gmm-sm.c asserts that a return value is not OGS_ERROR instead of handling the error. Reachability requires the ability to send NAS messages from a UE, and assertion failure terminates the AMF process.

CVSS severity7.5
High
EPSS probability0.61%
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 the AMF in Open5GS before 2.7.1 allows remote attackers to crash the AMF via a sequence of NAS messages. The gmm_state_authentication handler in src/amf/gmm-sm.c asserts that a return value is not OGS_ERROR instead of handling the error. Reachability requires the ability to send NAS messages from a UE, and assertion failure terminates the AMF process.

The record

CVE
CVE-2024-34475
Published
May 4, 2024
Updated
Aug 2, 2024
Vendor
Open5GS
Product
Open5GS
Classifications
CWE-617, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 4, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.7.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open5GS · Open5GSversion=2.7.1

Published CVSS scores

7.5CISA ADP VulnrichmentCVSS: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.

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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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