CVE-2023-26557
Published:April 21, 2023
Updated:September 23, 2026
io.finnet tss-lib before 2.0.0 can leak the lambda value of a private key via a timing side-channel attack because it relies on Go big.Int, which is not constant time for Cmp, modular exponentiation, or modular inverse. An example leak is in crypto/paillier/paillier.go. (bnb-chain/tss-lib and thorchain/tss are also affected.)
Affected Packages
github.com/binance-chain/tss-lib (GO):
Affected version(s) >=pre-protobufs <v1.3.6-0.20230324145555-bb6fb30bd3ebFix Suggestion:
Update to version v1.3.6-0.20230324145555-bb6fb30bd3ebgithub.com/bnb-chain/tss-lib (GO):
Affected version(s) >=pre-protobufs <v1.3.6-0.20230324145555-bb6fb30bd3ebFix Suggestion:
Update to version v1.3.6-0.20230324145555-bb6fb30bd3ebRelated Resources (8)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Observable Discrepancy
EPSS
Base Score:
0.86