UBUNTU-CVE-2025-8556 (CVE-2025-8556)

Vulnerability from osv_ubuntu – Published: 2025-08-06 09:15 – Updated: 2026-01-20 05:25 – Source website
VLAI
Details

A flaw was found in CIRCL's implementation of the FourQ elliptic curve. This vulnerability allows an attacker to compromise session security via low-order point injection and incorrect point validation during Diffie-Hellman key exchange.

Severity
3.7 (Low)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-cloudflare-circl-dev",
            "binary_version": "1.0.0+20200724-1ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "golang-github-cloudflare-circl",
        "purl": "pkg:deb/ubuntu/golang-github-cloudflare-circl@1.0.0+20200724-1ubuntu1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.0+20200724-1",
        "1.0.0+20200724-1ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-cloudflare-circl-dev",
            "binary_version": "1.3.7-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "golang-github-cloudflare-circl",
        "purl": "pkg:deb/ubuntu/golang-github-cloudflare-circl@1.3.7-1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3.3-1",
        "1.3.5-1",
        "1.3.6-1",
        "1.3.7-1"
      ]
    }
  ],
  "aliases": [],
  "details": "A flaw was found in CIRCL\u0027s implementation of the FourQ elliptic curve. This vulnerability allows an attacker to compromise session security via low-order point injection and incorrect point validation during Diffie-Hellman key exchange.",
  "id": "UBUNTU-CVE-2025-8556",
  "modified": "2026-01-20T05:25:04Z",
  "published": "2025-08-06T09:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-8556"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-8556"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2371624"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/cloudflare/circl/security/advisories/GHSA-2x5j-vhc8-9cwm"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-8556"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/cloudflare/circl"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/cloudflare/circl/tree/v1.6.1"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2025-8556"
  ]
}



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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

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Nomenclature

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.