QID 150469

Date Published: 2022-02-14

QID 150469: PHP Multiple Vulnerabilities (CVE-2021-21704,CVE-2021-21705)

PHP is a programming language originally designed for use in web-based applications with HTML content. PHP supports a wide variety of platforms and is used by numerous web-based software applications.

Multiple Vulnerabilities are identified in PHP:
CVE-2021-21704 : A bug in "pdo_firebase" module allows a malicious firebase server or man-in-the-middle attacker to crash PHP.

CVE-2021-21705 : PHP incorrectly handled the "FILTER_VALIDATE_URL" check. A remote attacker could possibly use this issue to perform a server- side request forgery attack.

Affected Versions:
7.3.x below 7.3.29
7.4.x below 7.4.21
8.0.x below 8.0.8

QID Detection Logic (Unauthenticated):
This QID checks the HTTP Server header to see if the server is running a vulnerable version of PHP.

Successful exploitation of these vulnerabilities could lead to addition or modification of data or Denial of Service (DoS).

  • CVSS V3 rated as Medium - 5.9 severity.
  • CVSS V2 rated as Medium - 5 severity.
    • Solution
    Customers are advised to upgrade to the latest version of PHP.
    Vendor References

    CVEs related to QID 150469

    CVE-2021-21704 | CVE-2021-21705 |
    Software Advisories
    Advisory ID Software Component Link
    Sec Bug 76448 URL Logo bugs.php.net/bug.php?id=76448
    Sec Bug 76449 URL Logo bugs.php.net/bug.php?id=76449
    Sec Bug 76450 URL Logo bugs.php.net/bug.php?id=76450
    Sec Bug 76452 URL Logo bugs.php.net/bug.php?id=76452
    Sec Bug 81122 URL Logo bugs.php.net/bug.php?id=81122
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