- Organisation
- Milk Sad research team
- Evidence role
- Primary technical research
- Published
- 2023-08-08
- Source changes
- 0
- Detected differences
- 0
- Unreviewed
- 0
- Copies held
- 1
Primary disclosure for CVE-2023-39910, including the 32-bit MT19937 seed funnel, partial impact accounting and comparison with the Trust Wallet incident.
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Milk Sad /home /updates /bx summary /bx full write-up /38c3 /faq Technical write-up for CVE-2023-31290 This is the story of a wallet theft enabled by bad cryptography. It covers our research on problems with Libbitcoin Explorer 3.x (CVE-2023-39910), outlines how it is related to the Trust Wallet vulnerability (CVE-2023-31290), and shows some of the real-world impact that we were able to confirm. Additionally, it has some early research on problems with bx 2.x that we became aware of late in the disclosure process. If you’re looking for a less-technical summary, head over to the summary page and the FAQs. Table of Contents Part I - Tracing the Issue to the Source Dude, Where’s my Cryptocurrency? Dude, Where’s my Friend’s Cryptocurrency? Our Cryptocurrency is Gone, But How!?!? Part II - Context and Impact Codename “Milk Sad” Not the First Hack: Weak entropy in Cake Wallet Not even the second Hack: Mersenne Twister use in Trust Wallet Ongoing On-Chain Thefts - Some Facts Searching for Wallets - Motivation and Limits Searching for Wallets - Implementation Other Confirmed Victims of this Theft Basic Timeline of Thefts and Our Disclosure Libbitcoin Team Response and Context Suspected RNG Problems in Older bx Versions Part III - Summary and Outlook Basic Lessons Learned Summary Future Work Additional References Commercial Work Other Notes Credits Part I - Tracing the Issue to the Source Please note that throughout this article, minor details relating to the victims have been omitted or changed. Dude, Where’s my Cryptocurrency? Our story starts on Friday, 21 July 2023. Upon attempting to use a well-protected cryptocurrency wallet, the wallet owner realizes that all of their funds stored in their wallet are gone. This was no accident – they were the victim of a sophisticated theft. The funds were sent to the attacker’s addresses on July 12th, at a time when the hardware wallet wasn’t in use for several days. (Details below) The generation and use of the affected wallet was unusually strict:Excerpt only. The complete copy is held offline and backs quotations on this site. The original publication remains the canonical public source.
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