Lack of URL normalization may lead to authorization bypass when URL access rules are used

緊急 9.8CVE-2020-24660 · GHSA-x44x-r84w-8v67 · 14/09/2020 公開 · 17/06/2026 更新

要点

CVE-2020-24660 は lemonldap (lemonldap-ng), lemonldap-ng-handler 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）：2.5%（全脆弱性の 84.5% より高い）。
対処：0.5.2 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
lemonldap lemonldap-ng	`≤ 2.0.8≤ 0.5.2`	修正版なし
lemonldap-ng-handler npm	`< 0.5.2`	`0.5.2`

概要

Impact

When access rules are used inside a protected host, some URL encodings may bypass filtering system.

Patches

Version 0.5.2 includes a patch that fixes the vulnerability

Workarounds

No way for users to fix or remediate the vulnerability without upgrading

References

https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/issues/2290

For more information

If you have any questions or comments about this advisory:

Open an issue in this repository or LemonLDAP::NG GitLab
Email us at [email protected]

NVD の説明

An issue was discovered in LemonLDAP::NG through 2.0.8, when NGINX is used. An attacker may bypass URL-based access control to protected Virtual Hosts by submitting a non-normalized URI. This also affects versions before 0.5.2 of the "Lemonldap::NG handler for Node.js" package.