CVE Catalog

CVE-2023-36998

HighCVSS 8.9
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.36%

28th percentile - higher than 28% of all known CVEs

Summary

NextEPC MME version 1.0.1 and earlier contains a stack-based buffer overflow vulnerability in the Emergency Number List decoding method. An attacker can send a NAS message with an oversized Emergency Number List value, overwriting the stack with arbitrary bytes.

Risk Assessment

An attacker with a cellphone connection to any base station managed by the MME can exploit this vulnerability without authenticating to the LTE core, potentially leading to MME compromise and network disruption.

Recommendation

Immediately update NextEPC MME to a version containing commit a8492c9c5bc0a66c6999cb5a263545b32a4109df or later. If updating is not possible, restrict MME access to trusted base stations only.

Related vulnerabilities

Original NVD description (English source)

The NextEPC MME <= 1.0.1 (fixed in commit a8492c9c5bc0a66c6999cb5a263545b32a4109df) contains a stack-based buffer overflow vulnerability in the Emergency Number List decoding method. An attacker may send a NAS message containing an oversized Emergency Number List value to the MME to overwrite the stack with arbitrary bytes. An attacker with a cellphone connection to any base station managed by the MME may exploit this vulnerability without having to authenticate with the LTE core.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS