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

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

ghsa
#git#ssl

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

  • kyberslash.cr.yp.to

References

  • GHSA-9763-4f94-gfch
  • cloudflare/circl@75ef91e
  • https://kyberslash.cr.yp.to/

bwesterb published to cloudflare/circl

Jan 8, 2024

Published to the GitHub Advisory Database

Jan 8, 2024

Reviewed

Jan 8, 2024

Last updated

Jan 8, 2024

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