VU#701544: Retraction of mpc-lib hardened derivation fails to protect ancestor isolation
Cybersecurity Classified by Officially
Fireblocks' mpc-lib library contains a cryptographic fail-open vulnerability in its BIP32 hardened derivation implementation in the case of a missing private parent key. This breaks the ancestor isolation property of hardened derivation, allowing an attacker with a compromised lower-level signer share to recover the higher-level share it was derived from. …
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Read the original at the source: https://kb.cert.org/vuls/id/701544
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This publication has changed since it was first published
3 versions recorded. The original is kept in full — nothing is overwritten.
- v3 imported change on current
- v2 imported change on Titled: “VU#701544: mpc-lib hardened derivation fails to protect ancestor isolation”
- v1 as first published on Titled: “VU#701544: mpc-lib Hardened Derivation Fails to Protect Ancestor Isolation”
Provenance
- Organization
- CERT Coordination Center — imported from official source
- Official source
- https://www.kb.cert.org/vuls/atomfeed/ ATOM
- Imported
- October 26, 2026 23:30
- Versions
- 3 recorded
- Identity
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https://kb.cert.org/vuls/id/701544