CIRCL's Kyber: timing side-channel (kyberslash2) · GHSA-9763-4f94-gfch · GitHub Advisory Database · GitHub

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

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

Package

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

kyberslash.cr.yp.to

References

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