MME crash via missing S1AP identifier
Published Jan 21, 2025 · Updated Jan 23, 2025
Null pointer dereference in Magma MME 1.8.0 and earlier allows network-adjacent attackers to crash the MME with a malformed S1AP packet. In s1ap_mme_handle_erab_rel_response, a failed lookup for the required MME_UE_S1AP_ID leaves ie null, but the handler dereferences ie to read the identifier. Access to the S1 interface as a base station or equivalent network-adjacent position is required, and one crafted E-RAB Release Response interrupts MME service.
Summary
What happened
Null pointer dereference in Magma MME 1.8.0 and earlier allows network-adjacent attackers to crash the MME with a malformed S1AP packet. In s1ap_mme_handle_erab_rel_response, a failed lookup for the required MME_UE_S1AP_ID leaves ie null, but the handler dereferences ie to read the identifier. Access to the S1 interface as a base station or equivalent network-adjacent position is required, and one crafted E-RAB Release Response interrupts MME service.
The record
- CVE
- CVE-2023-37026
- Published
- Jan 21, 2025
- Updated
- Jan 23, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-476, T1499.004
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 21, 2025CVE publishedPublication date reported by the CVE source.
- Jan 23, 2025Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
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Published CVSS scores
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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.
Weakness, pattern, technique
Public exploit references
- Malformed E-RAB Release Response proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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