A Malicious SIM Card Can Run Attacker Code Inside the Modems Behind Cellular IoT Devices thehackernews.com
A malicious SIM card can order the device it sits in to run commands of the attacker's choosing. On the cellular modules built into electric-vehicle chargers, industrial routers, and car telematics units, that is enough to take the whole device over. Researchers at the University of Birmingham and the security firm Fuzzware tested 26 phones and cellular modules for the capability, found it
An attacker drained 1,196 Bitcoin addresses in 41 minutes on July 30, taking 1,082.65 BTC worth about $70.2 million at the time. Galaxy Research mapped the sweep and tied it to a firmware flaw in Coldcard, the Bitcoin-only hardware wallet made by Canadian firm Coinkite. A March 2021 firmware integration error routed seed generation to a deterministic software pseudorandom number generator (PRNG) instead of the STM32 hardware random number generator (RNG). Block says an attacker who can determine or sufficiently constrain the device UID, timer state, and prior RNG-call history can reproduce candidate output streams offline without accessing the device. Candidate seeds can then be checked by deriving their addresses and comparing them with public blockchain data. Coinkite shipped emergency firmware for every affected model and release track on July 31, but installing it does not repair an existing seed. Coinkite tells owners with exposed seeds to generate a new one on patched firmware and move their coins.
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