Symfony vulnerable to Session Fixation of CSRF tokens

高 8.8CVE-2022-24895 · BIT-symfony-2022-24895 · GHSA-3gv2-29qc-v67m · 03/02/2023 公開 · 17/06/2026 更新

要点

CVE-2022-24895 は symfony/security-bundle, symfony/symfony, symfony (sensiolabs) に影響する深刻度「高」 (CVSS 8.8) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.79%（全脆弱性の 56.3% より高い）。
対処：4.4.50, 5.4.20, 6.0.20, 6.1.12 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
symfony/security-bundle Packagist	`≥ 2.0.0, < 4.4.50≥ 5.0.0, < 5.4.20≥ 6.0.0, < 6.0.20≥ 6.1.0, < 6.1.12≥ 6.2.0, < 6.2.6`	`4.4.505.4.206.0.206.1.126.2.6`
symfony/symfony Packagist	`≥ 2.0.0, < 4.4.50≥ 5.0.0, < 5.4.20≥ 6.0.0, < 6.0.20≥ 6.1.0, < 6.1.12≥ 6.2.0, < 6.2.6`	`4.4.505.4.206.0.206.1.126.2.6`
symfony sensiolabs	`≥ 2.0.0, < 4.4.50≥ 5.0.0, < 5.4.20≥ 6.0.0, < 6.0.20≥ 6.1.0, < 6.1.12≥ 6.2.0, < 6.2.6`	`4.4.505.4.206.0.206.1.126.2.6`

概要

Description

When authenticating users Symfony by default regenerates the session ID upon login, but preserves the rest of session attributes. Because this does not clear CSRF tokens upon login, this might enables same-site attackers to bypass the CSRF protection mechanism by performing an attack similar to a session-fixation.

Resolution

Symfony removes all CSRF tokens from the session on successful login.

The patch for this issue is available here for branch 4.4.

Credits

We would like to thank Marco Squarcina for reporting the issue and Nicolas Grekas for fixing it.

NVD の説明

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. When authenticating users Symfony by default regenerates the session ID upon login, but preserves the rest of session attributes. Because this does not clear CSRF tokens upon login, this might enables same-site attackers to bypass the CSRF protection mechanism by performing an attack similar to a session-fixation. This issue has been fixed in the 4.4 branch.