CVE-2023-37009
CVE-2023-37009 is a medium-severity vulnerability in Open5gs with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-617.
Key facts
- Severity: Medium (CVSS 3.x base score 6.3)
- EPSS exploit prediction: 0% (38th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2023-40929
- Weakness: CWE-617
- Affected product: Open5gs
- Published:
- Last modified:
Description
Open5GS MME versions <= 2.6.4 contain an assertion that can be remotely triggered via a malformed ASN.1 packet over the S1AP interface. An attacker may send a `Handover Notification` message missing a required `MME_UE_S1AP_ID` field to repeatedly crash the MME, resulting in denial of service.
Frequently asked questions
- What is CVE-2023-37009?
- Open5GS MME versions <= 2.6.4 contain an assertion that can be remotely triggered via a malformed ASN.1 packet over the S1AP interface. An attacker may send a `Handover Notification` message missing a required `MME_UE_S1AP_ID` field to repeatedly crash the MME, resulting in denial of service.
- How severe is CVE-2023-37009?
- CVE-2023-37009 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
- Is CVE-2023-37009 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2023-37009?
- CVE-2023-37009 affects Open5gs. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2023-37009?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2023-37009 have an EU (EUVD) identifier?
- Yes. CVE-2023-37009 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-40929.
- When was CVE-2023-37009 published?
- CVE-2023-37009 was published on 2025-01-22 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*
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