Deserialization of Untrusted Data in Codeigniter4

緊急 9.8CVE-2022-21647 · BIT-codeigniter-2022-21647 · GHSA-w6jr-wj64-mc9x · 04/01/2022 公開 · 17/06/2026 更新

要点

CVE-2022-21647 は codeigniter4/framework, codeigniter (codeigniter) に影響する深刻度「緊急」 (CVSS 9.8) の脆弱性です。
今後30日間に悪用される確率（EPSS）：37.7%（全脆弱性の 98.5% より高い）。
対処：4.1.6 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
codeigniter4/framework Packagist	`< 4.1.6`	`4.1.6`
codeigniter codeigniter	`≥ 4.0.0, < 4.1.6`	`4.1.6`

概要

Impact

Deserialization of Untrusted Data was found in the old() function in CodeIgniter4. Remote attackers may inject auto-loadable arbitrary objects with this vulnerability, and possibly execute existing PHP code on the server. We are aware of a working exploit, which can lead to SQL injection.

Patches

Upgrade to v4.1.6 or later.

Workarounds

Do not use:

old() and form_helper
RedirectResponse::withInput() and redirect()->withInput()

References

PHP Object Injection | OWASP

For more information

If you have any questions or comments about this advisory:

Open an issue in codeigniter4/CodeIgniter4
Email us at SECURITY.md

NVD の説明

CodeIgniter is an open source PHP full-stack web framework. Deserialization of Untrusted Data was found in the `old()` function in CodeIgniter4. Remote attackers may inject auto-loadable arbitrary objects with this vulnerability, and possibly execute existing PHP code on the server. We are aware of a working exploit, which can lead to SQL injection. Users are advised to upgrade to v4.1.6 or later. Users unable to upgrade as advised to not use the `old()` function and form_helper nor `RedirectResponse::withInput()` and `redirect()->withInput()`.