Paper/Archive/CVE-2023-26556

CVE-2023-26556

mitre — io.finnet tss-lib before 2.0.0 can leak a secret key via a timing side-channel attack because it relies on the scalar-multiplication impl…

EPSS 0.9%CVSS 9.1

critical.is priorityof 100

CVSS 9.1 (NVD, ADP agree)9.1 / 10 × 3027.3 Not in CISA KEV+300.0 EPSS percentile 58.6.586 × 2011.7 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

io.finnet tss-lib before 2.0.0 can leak a secret key via a timing side-channel attack because it relies on the scalar-multiplication implementation in Go crypto/elliptic, which is not constant time (there is an if statement in a loop). One leak is in ecdsa/keygen/round_2.go. (bnb-chain/tss-lib and thorchain/tss are also affected.)

Affected

ProductAffectedFixed inSource

n/an/a–CNA

Scores by source

CISA ADP9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/IoFinnet/tss-lib/releases/tag/v2.0.0 refgithub.com/bnb-chain/tss-lib/tree/v1.3.5 refgitlab.com/thorchain/tss/tss-lib/-/tags/v0.1.3 refmedium.com/%40iofinnet/security-disclosure-for-ecdsa-and-eddsa-threshold-signature-schemes-4e969af7155b