GHSA-9763-4F94-GFCH

Vulnerability from github – Published: 2024-01-08 16:45 – Updated: 2024-05-20 22:00
VLAI?
Summary
CIRCL's Kyber: timing side-channel (kyberslash2)
Details

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

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/cloudflare/circl"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": true,
    "github_reviewed_at": "2024-01-08T16:45:05Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Impact\nOn some platforms, when an attacker can time decapsulation of Kyber on forged cipher texts, they could possibly learn (parts of) the secret key.\n\nDoes not apply to ephemeral usage, such as when used in the regular way in TLS.\n\n### Patches\nPatched in 1.3.7.\n\n### References\n- [kyberslash.cr.yp.to](https://kyberslash.cr.yp.to/)",
  "id": "GHSA-9763-4f94-gfch",
  "modified": "2024-05-20T22:00:44Z",
  "published": "2024-01-08T16:45:05Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/cloudflare/circl/security/advisories/GHSA-9763-4f94-gfch"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cloudflare/circl/commit/75ef91e8a2f438e6ce2b6e620d236add8be1887d"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/cloudflare/circl"
    },
    {
      "type": "WEB",
      "url": "https://kyberslash.cr.yp.to"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "CIRCL\u0027s Kyber: timing side-channel (kyberslash2)"
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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