CVE-2023-26556: Github.com/bnb chain/tss lib IO FinNet Tss-lib Vulnerable To Vulnerability
CRITICALCVE-2023-26556 is a CRITICAL (CVSS 9.1) io finnet tss-lib vulnerable to vulnerability (CWE-203: Observable Discrepancy) affecting Github.com/bnb chain/tss lib libraries in the Go ecosystem. The issue involves io finnet tss-lib vulnerable to timing attack from non-constant time scalar multiplication. Remediation is available by upgrading affected packages to version 2.0.0.
CVE-2023-26556 at a Glance
Security Impact
CVSS: 9.1
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N).
How to Fix CVE-2023-26556
To remediate this vulnerability, upgrade all affected Github.com/bnb chain/tss lib dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade github.com/bnb-chain/tss-lib to 2.0.0Upgrade github.com/binance-chain/tss-lib to 2.0.0Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/bnb-chain/tss-libHow to Check if You Are Affected
To determine whether your application is affected by CVE-2023-26556, inspect your project dependencies for Github.com/bnb chain/tss lib:
inspect dependencies for github.com/bnb-chain/tss-libAnalyze the terminal output to locate any version of Github.com/bnb chain/tss lib in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.0.0), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-203: Observable Discrepancy, where the product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor. In Github.com/bnb chain/tss lib, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2023-26556 Affected Github.com/bnb chain/tss lib Versions
2 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/bnb-chain/tss-lib
|
Go |
< 2.0.0
|
2.0.0
|
|
github.com/binance-chain/tss-lib
|
Go |
< 2.0.0
|
2.0.0
|
References
Frequently Asked Questions
What is CVE-2023-26556?
Which Github.com/bnb chain/tss lib versions are affected?
What version fixes CVE-2023-26556?
Is github.com/bnb-chain/tss-lib affected?
Is github.com/binance-chain/tss-lib affected?
What is the CVSS score of CVE-2023-26556?
What CWE is associated with CVE-2023-26556?
How can I check Go dependencies for CVE-2023-26556?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-3w84-4mjc-rjw7",
"modified" : "2025-02-05T19:42:53Z",
"published" : "2023-04-21T18:30:24Z",
"aliases" : [ "CVE-2023-26556" ],
"summary" : "IO FinNet tss-lib vulnerable to timing attack from non-constant time scalar multiplication",
"details" : "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.)",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/bnb-chain/tss-lib"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "2.0.0"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/binance-chain/tss-lib"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "2.0.0"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-26556"
}, {
"type" : "WEB",
"url" : "https://github.com/bnb-chain/tss-lib/issues/44"
}, {
"type" : "WEB",
"url" : "https://github.com/IoFinnet/tss-lib/releases/tag/v2.0.0"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/bnb-chain/tss-lib"
}, {
"type" : "WEB",
"url" : "https://github.com/bnb-chain/tss-lib/releases/tag/v2.0.0"
}, {
"type" : "WEB",
"url" : "https://github.com/bnb-chain/tss-lib/tree/v1.3.5"
}, {
"type" : "WEB",
"url" : "https://gitlab.com/thorchain/tss/tss-lib/-/tags/v0.1.3"
}, {
"type" : "WEB",
"url" : "https://medium.com/@iofinnet/security-disclosure-for-ecdsa-and-eddsa-threshold-signature-schemes-4e969af7155b"
}, {
"type" : "WEB",
"url" : "https://pkg.go.dev/vuln/GO-2023-1732"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-203" ],
"severity" : "CRITICAL",
"github_reviewed" : true,
"github_reviewed_at" : "2025-02-05T19:42:53Z",
"nvd_published_at" : "2023-04-21T18:15:07Z"
}
}