Samson Mow: Coldcard Vulnerability Hits Sovereign Holders, May Be Worse Than Exchange Hacks
Samson Mow stated that the COLDCARD RNG vulnerability may be more severe than exchange hacks, directly impacting Bitcoin holders who have done their research and practice self-custody.
He pointed out that the vulnerability affects those who understand the importance of self-custody and do not keep their coins on exchanges, resulting in irreversible losses. Mow emphasized that self-custody is difficult, advocating for the use of multi-vendor multi-signature solutions to eliminate single points of failure, and suggested that affected individuals document the facts, report to the authorities, retain their devices and seeds, and be wary of recovery scams. He also mentioned that criticism of those using custodial services or ETFs should be reduced, as there are trade-offs in how Bitcoin is used.
The vulnerability exposes the single point of failure risk in hardware wallet RNGs, with funds flowing from affected self-custody addresses to attackers; the incident was driven by the exploitation of firmware defects, benefiting the attackers who discovered and exploited the vulnerability, while putting pressure on sovereign holders relying on a single hardware vendor.
Source: Public Information
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Samson Mow has long advocated for Bitcoin self-custody and Layer 2 solutions, previously serving as Blockstream's CSO and founding JAN3, consistently criticizing custodial risks; COLDCARD, developed by Coinkite, is known for its open-source firmware and air-gapped security, and has long been viewed as a high-security option by the sovereign holder community. However, since 2021, some firmware has reverted to predictable software sources for RNG, leading to severely insufficient seed entropy.
The vulnerability allows attackers to reconstruct private keys and sweep dormant addresses, resulting in approximately 594 to 1082 BTC stolen; Mow recommends transitioning to multi-vendor multi-signature solutions, motivated by the need to diversify hardware trust, similar to the community's push for multi-signature solutions following historical vulnerabilities in Trezor or Ledger, shifting funds and trust from a single hardware vendor to a cross-vendor architecture.
This incident is reminiscent of early 2010s hardware wallet entropy defect cases and echoes the community's reaffirmation of cold storage following exchange hot wallet thefts; currently, Bitcoin self-custody is transitioning from single-device trust to multi-point verification, with the narrative of single-vendor security being undermined by reality.
Essentially, this represents a technological replacement and trust reconstruction: the failure of hardware RNG exposes the vulnerabilities of self-custody, forcing the market to shift from "trusting a single device" to a multi-signature structure that assumes all vendors are adversaries, accelerating the upgrade of security standards from product-level to system-level.
ABAB News · Law of Cognition
- The enemy of self-custody is often the device you trust.
- Single points of failure will ultimately become systemic risks.
- Security is not a product; it is a continuous assumption of the worst-case scenario.