ubuntu-cve-2017-18264
Vulnerability from osv_ubuntu
Published
2018-05-01 17:29
Modified
2025-07-18 16:44
Summary
Details

An issue was discovered in libraries/common.inc.php in phpMyAdmin 4.0 before 4.0.10.20, 4.4.x, 4.6.x, and 4.7.0 prereleases. The restrictions caused by $cfg['Servers'][$i]['AllowNoPassword'] = false are bypassed under certain PHP versions (e.g., version 5). This can allow the login of users who have no password set even if the administrator has set $cfg['Servers'][$i]['AllowNoPassword'] to false (which is also the default). This occurs because some implementations of the PHP substr function return false when given '' as the first argument.

Severity
9.8 (Critical)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "phpmyadmin",
            "binary_version": "4:4.0.10-1ubuntu0.1+esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "phpmyadmin",
        "purl": "pkg:deb/ubuntu/phpmyadmin@4:4.0.10-1ubuntu0.1+esm4?arch=source\u0026distro=trusty/esm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4:4.0.10-1ubuntu0.1+esm4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4:4.0.6-1",
        "4:4.0.8-1",
        "4:4.0.9-1",
        "4:4.0.10-1",
        "4:4.0.10-1ubuntu0.1",
        "4:4.0.10-1ubuntu0.1+esm1",
        "4:4.0.10-1ubuntu0.1+esm2",
        "4:4.0.10-1ubuntu0.1+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "phpmyadmin",
            "binary_version": "4:4.5.4.1-2ubuntu2.1+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "phpmyadmin",
        "purl": "pkg:deb/ubuntu/phpmyadmin@4:4.5.4.1-2ubuntu2.1+esm3?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4:4.5.4.1-2ubuntu2.1+esm3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4:4.4.13.1-1",
        "4:4.5.0.2-2",
        "4:4.5.1-1",
        "4:4.5.1-2",
        "4:4.5.1-3",
        "4:4.5.2-1",
        "4:4.5.2-2",
        "4:4.5.3.1-1",
        "4:4.5.4-1",
        "4:4.5.4.1-2",
        "4:4.5.4.1-2ubuntu1",
        "4:4.5.4.1-2ubuntu2",
        "4:4.5.4.1-2ubuntu2.1",
        "4:4.5.4.1-2ubuntu2.1+esm2"
      ]
    }
  ],
  "aliases": [],
  "details": "An issue was discovered in libraries/common.inc.php in phpMyAdmin 4.0 before 4.0.10.20, 4.4.x, 4.6.x, and 4.7.0 prereleases. The restrictions caused by $cfg[\u0027Servers\u0027][$i][\u0027AllowNoPassword\u0027] = false are bypassed under certain PHP versions (e.g., version 5). This can allow the login of users who have no password set even if the administrator has set $cfg[\u0027Servers\u0027][$i][\u0027AllowNoPassword\u0027] to false (which is also the default). This occurs because some implementations of the PHP substr function return false when given \u0027\u0027 as the first argument.",
  "id": "UBUNTU-CVE-2017-18264",
  "modified": "2025-07-18T16:44:19Z",
  "published": "2018-05-01T17:29:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2017-18264"
    },
    {
      "type": "REPORT",
      "url": "https://www.phpmyadmin.net/security/PMASA-2017-8/"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/phpmyadmin/phpmyadmin/commit/7232271a379396ca1d4b083af051262057003c41"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/phpmyadmin/phpmyadmin/commit/b6ca92cc75c8a16001425be7881e73430bcc35b8"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2017-18264"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4843-1"
    }
  ],
  "related": [
    "USN-4843-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2017-18264"
  ]
}



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