How severe is GHSA-f6jh-hvg2-9525?

No CVSS score has been assigned to GHSA-f6jh-hvg2-9525 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-f6jh-hvg2-9525?

GHSA-f6jh-hvg2-9525 affects the following packages: github.com/kudelskisecurity/crystals-go (Go). Ecosystems affected: Go.

How do I fix GHSA-f6jh-hvg2-9525?

Update github.com/kudelskisecurity/crystals-go to 0.0.0-20240116172146-2a6ca2d4e64d or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-f6jh-hvg2-9525 is resolved across your whole dependency graph.

How do I detect GHSA-f6jh-hvg2-9525 in my Go dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/kudelskisecurity/crystals-go, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-f6jh-hvg2-9525 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is GHSA-f6jh-hvg2-9525 actively exploited in the wild?

No public exploit code has been indexed for GHSA-f6jh-hvg2-9525 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

When was GHSA-f6jh-hvg2-9525 published, and has it been updated?

GHSA-f6jh-hvg2-9525 was published on January 17, 2024 and was last updated on May 20, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐹 Go

Not in CISA KEV

crystals-go vulnerable to KyberSlash (timing side-channel attack for Kyber)GHSA-f6jh-hvg2-9525

Fix: kudelskisecurity/crystals-go#20

GHSA-f6jh-hvg2-9525 is a security vulnerability in github.com/kudelskisecurity/crystals-go. A fix is available for github.com/kudelskisecurity/crystals-go — see the affected versions and patch details below.

Also known asGO-2024-2469

Published

Jan 17, 2024

Updated

May 20, 2024

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of May 20, 2024 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

🐹github.com/kudelskisecurity/crystals-go

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

Impact

On some platforms, when an attacker can time decapsulation of Kyber on forged cipher texts, they could possibly learn (parts of) the secret key.

Patches

Patched in https://github.com/kudelskisecurity/crystals-go/pull/21

Note

This library was written as part of a MsC student project in the Cybersecurity Team at Kudelski Security. It is not actively maintained anymore. It is only intended for research and testing. We discourage its use in any production environment. Kudelski Security does not use this library as part of their commercial offers or product. This has now been clarified on the project's README.

References

https://groups.google.com/a/list.nist.gov/g/pqc-forum/c/ldX0ThYJuBo http://kyberslash.cr.yp.to/

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐹Go	`github.com/kudelskisecurity/crystals-go`	all versions	0.0.0-20240116172146-2a6ca2d4e64d`go get github.com/kudelskisecurity/crystals-go@v0.0.0-20240116172146-2a6ca2d4e64d`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/kudelskisecurity/crystals-go, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/kudelskisecurity/crystals-go to 0.0.0-20240116172146-2a6ca2d4e64d or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-f6jh-hvg2-9525 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

### Impact On some platforms, when an attacker can time decapsulation of Kyber on forged cipher texts, they could possibly learn (parts of) the secret key. ### Patches Patched in https://github.com/kudelskisecurity/crystals-go/pull/21 ### Note This library was written as part of a MsC student project in the Cybersecurity Team at Kudelski Security. It is not actively maintained anymore. It is only intended for research and testing. We discourage its use in any production environment. Kudelski Security does not use this library as part of their commercial offers or product. This has now been c

O3 Security · Impact-Aware SCA

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