Vulnerability DatabaseCVE-2023-26557
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CVE-2023-26557
April 21, 2023
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.)
Related Resources (8)
https://github.com/bnb-chain/tss-lib/tree/v1.3.5
https://nvd.nist.gov/vuln/detail/CVE-2023-26557
https://pkg.go.dev/vuln/GO-2023-1733
https://github.com/IoFinnet/tss-lib/releases/tag/v2.0.0
https://medium.com/@iofinnet/security-disclosure-for-ecdsa-and-eddsa-threshold-signature-schemes-4e969af7155b
https://github.com/bnb-chain/tss-lib
https://gitlab.com/thorchain/tss/tss-lib/-/tags/v0.1.3
https://medium.com/%40iofinnet/security-disclosure-for-ecdsa-and-eddsa-threshold-signature-schemes-4e969af7155b
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CVSS 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
CWE-203
EPSS
Base Score:
0.24