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TI-2021-04784 Aliases CVE-2021-21704GHSA-q773-v75g-5rqg

Multiple vulnerabilities in Firebird client extension

Priority LOW 30CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.

Summary

In PHP versions 7.3.x below 7.3.29, 7.4.x below 7.4.21 and 8.0.x below 8.0.8, when using Firebird PDO driver extension, a malicious database server could cause crashes in various database functions, such as getAttribute(), execute(), fetch() and others by returning invalid response data that is not parsed correctly by the driver. This can result in crashes, denial of service or potentially memory corruption.

Why it matters now

EPSS 0.01796 78th percentileScored 2026-11-07
Public exploit Yes 4 exploit referencesTagged by NVD
Fix Fixed PHP (PHP Group): 7.3.29, 7.4.21, 8.0.8

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
PHP GroupPHP7.3.x to before 7.3.29; 7.4.x to before 7.4.21; 8.0.X to before 8.0.87.3.29, 7.4.21, 8.0.8Patch availableCNA
  • PHP VendorPHP Group Affected 7.3.x to before 7.3.29; 7.4.x to before 7.4.21; 8.0.X to before 8.0.8 Fixed in 7.3.29, 7.4.21, 8.0.8 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*7.3.0 to before 7.3.29; 7.4.0 to before 7.4.21; 8.0.0 to before 8.0.8VulnerablePHP
cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
  • cpe:2.3:a:php:php:*:*:*:*:*:*:*:* Versions 7.3.0 to before 7.3.29; 7.4.0 to before 7.4.21; 8.0.0 to before 8.0.8 Vulnerable ·PHP
  • cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp

Remediation

  • Fix · CNA PHP (PHP Group) Fixed in 7.3.29, 7.4.21, 8.0.8

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    PHP 7.3.29, 7.4.21, 8.0.8

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2021-04785 Incorrect URL validation in FILTER_VALIDATE_URLPriority LOW 28
    Show all 2 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 5 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Software Collections

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-21704
  2. 2026-10-03 Alias added: GHSA-q773-v75g-5rqg

References

Exploit 4

Advisory 2

  • TI-2024-04260 Argument Injection in PHP-CGI KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-78794 PHP remote code execution via stale global state KEVCVSS 4.0CRITICAL 9.2
  • TI-2026-78793 Out-of-memory handling flaw in PHP allows remote code execution KEVCVSS 4.0CRITICAL 9.2
  • TI-2024-01743 Command injection via array-ish $command parameter of proc_open() CVSS 3.1CRITICAL 9.4
  • TI-2022-13555 PDO::quote() may return unquoted string CVSS 3.1CRITICAL 9.1
  • TI-2024-10408 Reference counting in php_request_shutdown causes Use-After-Free CVSS 4.0CRITICAL 9.2
See all 107 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences