QID 356080

QID 356080: Amazon Linux Security Advisory for Hypertext Preprocessor (PHP) : ALASPHP8.0-2023-008

Several flaws has been found in php.
The pdo_firebase module does not check the length of the server version string in a response packet causing a stack buffer overflow, does not verify the data and uses the wrong type to cast length leading to a crash, and does not validate the response before calculation of the exec procedure leading to a crash.
The highest threat from this vulnerability is to system availability. (
( CVE-2021-21704) php: ssrf bypass in filter_validate_url (cve-2021-21705)



Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

Successful exploitation of this vulnerability could lead to a securitybreach or could affect integrity, availability, and confidentiality.

  • CVSS V3 rated as Medium - 5.9 severity.
  • CVSS V2 rated as Medium - 5 severity.
    • Solution
    Please refer to Amazon advisory: ALASPHP8.0-2023-008 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 356080

    CVE-2021-21704 | CVE-2021-21705 |
    Software Advisories
    Advisory ID Software Component Link
    ALASPHP8.0-2023-008 amazon linux 2 URL Logo alas.aws.amazon.com/AL2/ALASPHP8.0-2023-008.html
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