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Shannon Baseband NrmmMsgCodec Access Category Definitions Heap Buffer Overflow

Shannon Baseband NrmmMsgCodec Access Category Definitions Heap Buffer Overflow
Posted Mar 17, 2023
Authored by Ivan Fratric, Google Security Research

There is a heap buffer overflow in Shannon Baseband, inside the 5G MM protocol implementation (NrmmMsgCodec as it is called in Shannon according to debug strings), specifically when handling the Operator-defined access category definitions message (IEI = 0x76).

tags | exploit, overflow, protocol
advisories | CVE-2023-26074
SHA-256 | 0d9b32ed9b931576486f7e7630f9b8e393f008ff2bccc77a8e30f84a45f1e0f0
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