CVE-2023-39910

CVSS V2 None CVSS V3 None
Description
The 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.
Overview
  • CVE ID
  • CVE-2023-39910
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2023-08-09T03:15:44
  • Last Modified Date
  • 2023-08-22T22:15:11
Weakness Enumerations
CWE URL
CWE-338 http://cwe.mitre.org/data/definitions/338.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:libbitcoin:libbitcoin_explorer:*:*:*:*:*:*:*:* 1 OR 3.0.0 3.6.0
References
Reference URL Reference Tags
https://github.com/libbitcoin/libbitcoin-explorer/blob/20eba4db9a8a3476949d6fd08a589abda7fde3e3/src/commands/seed.cpp#L44 Third Party Advisory
https://github.com/libbitcoin/libbitcoin-explorer/blob/20eba4db9a8a3476949d6fd08a589abda7fde3e3/src/utility.cpp#L78 Third Party Advisory
https://github.com/libbitcoin/libbitcoin-system/blob/a1b777fc51d9c04e0c7a1dec5cc746b82a6afe64/src/crypto/pseudo_random.cpp#L66C12-L78 Third Party Advisory
https://milksad.info/disclosure.html Third Party Advisory
https://news.ycombinator.com/item?id=37054862 Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2023-39910
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-39910
History
Created Old Value New Value Data Type Notes
2023-09-06 03:20:36 Added to TrackCVE
2023-09-06 03:20:38 Weakness Enumeration new