The vulnerability known as Milk Sad exposed critical flaws in private key generation. OneKey confirmed that its wallets were not affected by the incident.
The incident known as Milk Sad revealed a serious flaw in the generation of private keys in certain wallets that used Libbitcoin Explorer (bx) version 3.x.
The vulnerability, which affects multiple versions of Trust Wallet and other integrations, allows attackers to reconstruct private keys by brute force.
OneKey, a provider of hardware and software wallets to the industry, confirmed that its products were not affected. In a recent post, the company shared a detailed technical analysis and security assessment that strengthens its position against these types of threats.
Trade crypto securely and securely with Bit2Me.A weak “seed” that opened the door to attackers
The origin of the Milk Sad vulnerability is in the algorithm Mersenne Twister-32, used by Libbitcoin Explorer (bx) 3.x to generate random numbers. This algorithm, although efficient for simulations and statistical calculations, is not suitable for cryptographic applications. In this case, The generator relied solely on the system time as a seed, which drastically reduced the entropy space. With only 2³² possible combinations, an attacker could enumerate all the seeds in a matter of days using a high-performance personal computer.
OneKey explained that the vulnerability allowed attackers to reconstruct the seed if they knew the approximate time the wallet was generated. Once they had the seed, they could reproduce the sequence of pseudo-random numbers and derive the private keyThis directly compromised the security of assets stored in the affected wallets.
According to publication, the compromised versions include the extension of Trust Wallet between v0.0.172 and v0.0.183, and Trust Wallet Core up to version 3.1.1, with the exception of the latter. Also affected are all wallets, both hardware and software, that integrate Libbitcoin Explorer 3.x or Trust Wallet Core in the aforementioned versions.
The incident has raised concerns in the crypto community, especially among users who relied on these tools to manage their digital assets.
Create your account and access crypto with a trusted exchange.Lessons from the Milk Sad incident
The main recommendation of the OneKey team is Avoid importing mnemonics generated in software environments into a hardware walletThis practice may inherit the lower entropy from the original environment, compromising the security of the private keyInstead, they suggest generating and storing keys directly within the secure element of the hardware wallet, where entropy is guaranteed by audited and tamper-resistant components.
In addition, OneKey has performed entropy quality assessments on all of its platforms, using recognized methodologies such as NIST SP800-22 and FIPS-140-2. These test results confirm that its systems fully comply with cryptographic randomness standards, reinforcing confidence in its products.
The Milk Sad incident also highlights the need for review the algorithms used in open source libraries such as Libbitcoin Explorer. While these tools are critical for developing decentralized applications, they must undergo constant audits to ensure that their critical components, such as random number generators, meet industry security requirements.
For developers, the case serves as a wake-up call regarding the importance of choosing appropriate key generation algorithms. The use of insecure PRNGs, such as Mersenne Twister, can have serious consequences if not accompanied by robust entropy mechanisms. In short, it recommends that the technical community prioritize the use of certified CSPRNGs and avoid dependencies that could compromise user security.
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A vulnerability that redefines good practices in key management
The Milk Sad incident reignited the debate over how private keys are generated and protected in the crypto ecosystem. The Libbitcoin Explorer flaw showed that even widely used tools can contain critical vulnerabilities if not properly audited. An attacker's ability to brute-force private keys from a weak seed represents a structural risk that urgently needs to be addressed.
OneKey responded with transparency and technical rigor, detailing how its products are designed to withstand these types of threats. Its hardware-based approach, with international certifications and entropy testing, offers an additional layer of security that is becoming essential in an environment where attacks are becoming increasingly sophisticated.
The recommendation to use hardware wallets for long-term asset management is not new, but it takes on relevance in this context. Key generation should be done in audited environments, with tamper-resistant components and certified algorithms. Importing keys from software may seem convenient, but it entails risks that can be avoided with good practices.
The Milk Sad case also encourages users to review their wallet versions and stay informed about security updates. Trust in the crypto ecosystem depends on its stakeholders' ability to respond quickly and responsibly to incidents like this. Transparency, ongoing auditing, and the use of international standards are fundamental pillars for building a secure and resilient infrastructure.
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