What is the severity of CVE-2023-26556?

CVE-2023-26556 is considered a high severity vulnerability due to the potential leak of secret keys through a timing side-channel attack.

How do I fix CVE-2023-26556?

To fix CVE-2023-26556, upgrade to tss-lib version 2.0.0 or later, which addresses the timing vulnerability.

What software is affected by CVE-2023-26556?

CVE-2023-26556 affects versions of tss-lib prior to 2.0.0 from the repositories maintained by io.finnet and bnb-chain.

What type of attack is associated with CVE-2023-26556?

CVE-2023-26556 is associated with a timing side-channel attack that can leak secret keys.

In what context does CVE-2023-26556 occur?

CVE-2023-26556 occurs due to the reliance on non-constant time scalar multiplication in the Go crypto/elliptic package.

Vulnerability/
CVE-2023-26556

critical

9.1

CWE

203

21/4/2023

5/2/2025

CVE-2023-26556

First published: Fri Apr 21 2023(Updated: )

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.)

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
go/github.com/binance-chain/tss-lib	<2.0.0	2.0.0
go/github.com/bnb-chain/tss-lib	<2.0.0	2.0.0
Binance TSS-lib	<2.0.0

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Frequently Asked Questions

What is the severity of CVE-2023-26556?
CVE-2023-26556 is considered a high severity vulnerability due to the potential leak of secret keys through a timing side-channel attack.
How do I fix CVE-2023-26556?
To fix CVE-2023-26556, upgrade to tss-lib version 2.0.0 or later, which addresses the timing vulnerability.
What software is affected by CVE-2023-26556?
CVE-2023-26556 affects versions of tss-lib prior to 2.0.0 from the repositories maintained by io.finnet and bnb-chain.
What type of attack is associated with CVE-2023-26556?
CVE-2023-26556 is associated with a timing side-channel attack that can leak secret keys.
In what context does CVE-2023-26556 occur?
CVE-2023-26556 occurs due to the reliance on non-constant time scalar multiplication in the Go crypto/elliptic package.

agent/type
agent/author
agent/weakness
agent/first-publish-date
agent/description
collector/mitre-cve
source/MITRE
collector/github-advisory-latest
source/GitHub
alias/GHSA-3w84-4mjc-rjw7
alias/CVE-2023-26556
agent/software-canonical-lookup
agent/last-modified-date
agent/references
agent/severity
agent/softwarecombine
agent/source
agent/event
collector/github-advisory
agent/tags
collector/nvd-cve
source/NVD
agent/software-canonical-lookup-request
collector/nvd-api
collector/nvd-index
package-manager/go
vendor/iofinnet
canonical/binance tss-lib

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Frequently Asked Questions

What is the severity of CVE-2023-26556?
CVE-2023-26556 is considered a high severity vulnerability due to the potential leak of secret keys through a timing side-channel attack.
How do I fix CVE-2023-26556?
To fix CVE-2023-26556, upgrade to tss-lib version 2.0.0 or later, which addresses the timing vulnerability.
What software is affected by CVE-2023-26556?
CVE-2023-26556 affects versions of tss-lib prior to 2.0.0 from the repositories maintained by io.finnet and bnb-chain.
What type of attack is associated with CVE-2023-26556?
CVE-2023-26556 is associated with a timing side-channel attack that can leak secret keys.
In what context does CVE-2023-26556 occur?
CVE-2023-26556 occurs due to the reliance on non-constant time scalar multiplication in the Go crypto/elliptic package.