CVE-2023-39910

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Summary

CVECVE-2023-39910
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-08-09 03:15:00 UTC
Updated2023-09-07 07:15:00 UTC
DescriptionThe cryptocurrency wallet entropy seeding mechanism used in Libbitcoin Explorer 3.0.0 through 3.6.0 is weak, aka the Milk Sad issue. The use of an mt19937 Mersenne Twister PRNG restricts the internal entropy to 32 bits regardless of settings. This allows remote attackers to recover any wallet private keys generated from "bx seed" entropy output and steal funds. (Affected users need to move funds to a secure new cryptocurrency wallet.) NOTE: the vendor's position is that there was sufficient documentation advising against "bx seed" but others disagree. NOTE: this was exploited in the wild in June and July 2023.

Risk And Classification

Problem Types: CWE-338

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Libbitcoin Libbitcoin Explorer All All All All

References

ReferenceSourceLinkTags
github.com/libbitcoin/libbitcoin-explorer/blob/20eba4db9a8a3476949d6fd08... MISC github.com
Milk Sad: /full write-up MISC milksad.info
github.com/libbitcoin/libbitcoin-system/blob/a1b777fc51d9c04e0c7a1dec5cc... MISC github.com
github.com/libbitcoin/libbitcoin-explorer/blob/20eba4db9a8a3476949d6fd08... MISC github.com
Milk Sad: Weak Entropy in libbitcoin (bc) seed generation | Hacker News MISC news.ycombinator.com
CVE 2023 39910 · libbitcoin/libbitcoin-explorer Wiki · GitHub MISC github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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