Vulnerability · Published Apr 21, 2023 · Assigned by mitre
CVE-2023-26557
High 7.5
In plain English
A high-severity security flaw in the github.com/binance-chain/tss-lib package (Go). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 59% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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 & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/binance-chain/tss-lib | 1.3.6-0.20230324145555-bb6fb30bd3eb | GHSA-mjqv-xhgm-gx8c |
| Go | github.com/binance-chain/tss-lib | no fix listed | GO-2023-1733 |
| Go | github.com/bnb-chain/tss-lib | 1.3.6-0.20230324145555-bb6fb30bd3eb | GHSA-mjqv-xhgm-gx8c |
| Go | github.com/bnb-chain/tss-lib | 1.3.6-0.20230324145555-bb6fb30bd3eb | GO-2023-1733 |
Affected products (as reported)
Weakness: CWE-203 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N