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deps: float 949ff366 from openssl (ECDSA blinding) (6.x backport) - #21347
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rvagg wants to merge 1 commit into
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deps: float 949ff366 from openssl (ECDSA blinding) (6.x backport)#21347rvagg wants to merge 1 commit into
rvagg wants to merge 1 commit into
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Pending OpenSSL 1.0.2p release. Ref: https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/ Ref: nodejs#21345 Upstream: openssl/openssl@949ff366 Original commit message: Add blinding to an ECDSA signature Keegan Ryan (NCC Group) has demonstrated a side channel attack on an ECDSA signature operation. During signing the signer calculates: s:= k^-1 * (m + r * priv_key) mod order The addition operation above provides a sufficient signal for a flush+reload attack to derive the private key given sufficient signature operations. As a mitigation (based on a suggestion from Keegan) we add blinding to the operation so that: s := k^-1 * blind^-1 (blind * m + blind * r * priv_key) mod order Since this attack is a localhost side channel only no CVE is assigned. Reviewed-by: Rich Salz <rsalz@openssl.org>
bnoordhuis
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Jun 15, 2018
shigeki
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Is the linter error due to Makefile faults?
jasnell
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Jun 15, 2018
refack
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Jun 15, 2018
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Due to changes in CI job config. It's being fixed. |
rvagg
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Jun 18, 2018
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Same as #21345 but for 1.0.2 on 8.x.
Pending OpenSSL 1.0.2p release.
Ref: https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/
Ref: #21345
Upstream: openssl/openssl@949ff366
Original commit message: