Vulnerability from bitnami_vulndb
Published
2024-03-06 11:06
Modified
2025-05-20 10:02
Summary
mb_strtolower (UTF-32LE): stack-buffer-overflow at php_unicode_tolower_full
Details

In PHP versions 7.3.x below 7.3.16 and 7.4.x below 7.4.4, while using mb_strtolower() function with UTF-32LE encoding, certain invalid strings could cause PHP to overwrite stack-allocated buffer. This could lead to memory corruption, crashes and potentially code execution.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "php",
        "purl": "pkg:bitnami/php"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.3.0"
            },
            {
              "fixed": "7.3.16"
            },
            {
              "introduced": "7.4.0"
            },
            {
              "fixed": "7.4.4"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2020-7065"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:php:php:*:*:*:*:*:*:*:*"
    ],
    "severity": "High"
  },
  "details": "In PHP versions 7.3.x below 7.3.16 and 7.4.x below 7.4.4, while using mb_strtolower() function with UTF-32LE encoding, certain invalid strings could cause PHP to overwrite stack-allocated buffer. This could lead to memory corruption, crashes and potentially code execution.",
  "id": "BIT-php-2020-7065",
  "modified": "2025-05-20T10:02:07.006Z",
  "published": "2024-03-06T11:06:52.660Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://bugs.php.net/bug.php?id=79371"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20200403-0001/"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/4330-1/"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/4330-2/"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2020/dsa-4719"
    },
    {
      "type": "WEB",
      "url": "https://www.oracle.com/security-alerts/cpuoct2021.html"
    },
    {
      "type": "WEB",
      "url": "https://www.php.net/ChangeLog-7.php#7.4.4"
    },
    {
      "type": "WEB",
      "url": "https://www.tenable.com/security/tns-2021-14"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-7065"
    }
  ],
  "schema_version": "1.5.0",
  "summary": "mb_strtolower (UTF-32LE): stack-buffer-overflow at php_unicode_tolower_full"
}


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Detection rules are retrieved from Rulezet.