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Fencer Intel
high —

GHSA-9763-4f94-gfch json

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

published 2y ago modified 2mo ago also GO-2024-2453

cvss
—
not scored
cisa kev
Not listed
not in CISA's catalog
epss
—
no score, EPSS covers CVEs only
public exploits
0
none known

Summary

### 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](https://kyberslash.cr.yp.to/)

Patch / fix

  • go github.com/cloudflare/circl 1.3.7

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Affected packages

ecosystem package affected fixed in
go github.com/cloudflare/circl
<1.3.7
1.3.7

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.