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CIRCL's Kyber: timing side-channel (kyberslash2)

High severity GitHub Reviewed Published Jan 8, 2024 in cloudflare/circl • Updated May 20, 2024

Package

gomod github.com/cloudflare/circl (Go)

Affected versions

< 1.3.7

Patched versions

1.3.7

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.

Does not apply to ephemeral usage, such as when used in the regular way in TLS.

Patches

Patched in 1.3.7.

References

References

@bwesterb bwesterb published to cloudflare/circl Jan 8, 2024
Published to the GitHub Advisory Database Jan 8, 2024
Reviewed Jan 8, 2024
Last updated May 20, 2024

Severity

High

Weaknesses

No CWEs

CVE ID

No known CVE

GHSA ID

GHSA-9763-4f94-gfch

Source code

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