« Volver al listado

CVE-2026-9494

Estado: Pendiente de análisisMedia (5.5)—

An information disclosure vulnerability exists in Canonical ubuntu-pro-client (formerly ubuntu-advantage-tools). The client validates Ubuntu Pro APT credentials by executing /usr/lib/apt/apt-helper using the download-file command. During this process, the secret bearer token is embedded directly in the cleartext URL component passed via the command-line arguments (argv), resulting in a URL format such as https://bearer:<token>@esm.ubuntu.com/.../.

Leer descripción completaMostrar menos

On systems utilizing a default-mounted /proc file system where process-hiding mitigations (such as hidepid) are disabled, an unprivileged local attacker can monitor system processes and read the sensitive bearer token directly from /proc/cmdline while the helper process is actively running. This leaked token can subsequently be used to gain unauthorized access to the victim's Ubuntu Pro or Expanded Security Maintenance (ESM) repositories.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Canonical — Ubuntu-pro-clientAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-9494",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-9494",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-07-16T13:36:06.361605Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security@ubuntu.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "security@ubuntu.com",
      "affectedData": [
        {
          "repo": "https://github.com/canonical/ubuntu-pro-client",
          "vendor": "Canonical",
          "product": "ubuntu-pro-client (ubuntu-advantage-tools)",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "37.3",
              "versionType": "python"
            }
          ],
          "platforms": [
            "Linux"
          ],
          "packageName": "ubuntu-pro-client",
          "collectionURL": "https://github.com/canonical/",
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools",
          "vendor": "Canonical",
          "product": "Ubuntu 26.04 LTS",
          "versions": [
            {
              "status": "unaffected",
              "version": "37.2ubuntu0.1",
              "versionType": "dpkg"
            }
          ],
          "platforms": [
            "Linux"
          ],
          "packageName": "ubuntu-advantage-tools",
          "collectionURL": "https://launchpad.net/ubuntu/resolute",
          "defaultStatus": "affected"
        },
        {
          "repo": "https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools",
          "vendor": "Canonical",
          "product": "Ubuntu 24.04 LTS",
          "versions": [
            {
              "status": "unaffected",
              "version": "37.2ubuntu~24.04.1",
              "versionType": "dpkg"
            }
          ],
          "platforms": [
            "Linux"
          ],
          "packageName": "ubuntu-advantage-tools",
          "collectionURL": "https://launchpad.net/ubuntu/noble",
          "defaultStatus": "affected"
        },
        {
          "repo": "https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools",
          "vendor": "Canonical",
          "product": "Ubuntu 22.04 LTS",
          "versions": [
            {
              "status": "unaffected",
              "version": "37.2ubuntu~22.04.1",
              "versionType": "dpkg"
            }
          ],
          "platforms": [
            "Linux"
          ],
          "packageName": "ubuntu-advantage-tools",
          "collectionURL": "https://launchpad.net/ubuntu/jammy",
          "defaultStatus": "affected"
        },
        {
          "repo": "https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools",
          "vendor": "Canonical",
          "product": "Ubuntu 20.04 LTS",
          "versions": [
            {
              "status": "unaffected",
              "version": "37.1ubuntu0~20.04.1",
              "versionType": "dpkg"
            }
          ],
          "platforms": [
            "Linux"
          ],
          "packageName": "ubuntu-advantage-tools",
          "collectionURL": "https://launchpad.net/ubuntu/focal",
          "defaultStatus": "affected"
        },
        {
          "repo": "https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools",
          "vendor": "Canonical",
          "product": "Ubuntu 18.04 LTS",
          "versions": [
            {
              "status": "unaffected",
              "version": "37.1ubuntu0~18.04.1",
              "versionType": "dpkg"
            }
          ],
          "platforms": [
            "Linux"
          ],
          "packageName": "ubuntu-advantage-tools",
          "collectionURL": "https://launchpad.net/ubuntu/bionic",
          "defaultStatus": "affected"
        },
        {
          "repo": "https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools",
          "vendor": "Canonical",
          "product": "Ubuntu 16.04 LTS",
          "versions": [
            {
              "status": "unaffected",
              "version": "37.1ubuntu0~16.04.1",
              "versionType": "dpkg"
            }
          ],
          "platforms": [
            "Linux"
          ],
          "packageName": "ubuntu-advantage-tools",
          "collectionURL": "https://launchpad.net/ubuntu/xenial",
          "defaultStatus": "affected"
        },
        {
          "repo": "https://launchpad.net/ubuntu/+source/ubuntu-advantage-tools",
          "vendor": "Canonical",
          "product": "Ubuntu 14.04 LTS",
          "versions": [
            {
              "status": "unaffected",
              "version": "19.7ubuntu0.1",
              "versionType": "dpkg"
            }
          ],
          "platforms": [
            "Linux"
          ],
          "packageName": "ubuntu-advantage-tools",
          "collectionURL": "https://launchpad.net/ubuntu/trusty",
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-07-16T13:16:34.520",
  "references": [
    {
      "url": "https://ubuntu.com/security/CVE-2026-9494",
      "source": "security@ubuntu.com"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@ubuntu.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-214"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An information disclosure vulnerability exists in Canonical ubuntu-pro-client (formerly ubuntu-advantage-tools). The client validates Ubuntu Pro APT credentials by executing /usr/lib/apt/apt-helper using the download-file command. During this process, the secret bearer token is embedded directly in\nthe cleartext URL component passed via the command-line arguments (argv), resulting in a URL format such as https://bearer:<token>@esm.ubuntu.com/.../. On systems utilizing a default-mounted /proc file system where process-hiding mitigations (such as hidepid) are disabled, an unprivileged local attacker can\nmonitor system processes and read the sensitive bearer token directly from /proc/cmdline while the helper process is actively running. This leaked token can subsequently be used to gain unauthorized access to the victim's Ubuntu Pro or Expanded Security Maintenance (ESM) repositories."
    }
  ],
  "lastModified": "2026-07-16T16:19:16.463",
  "sourceIdentifier": "security@ubuntu.com"
}