| 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 |
|---|---|---|
| simplesamlphp/saml2 | ≥ 4.20.0, < 4.20.3< 4.19.3 | 4.20.34.19.3 |
| simplesamlphp/saml2-legacy | ≥ 4.20.0, < 4.20.3< 4.19.3 | 4.20.34.19.3 |
This library turned out to be vulnerable to Denial-of-Service attacks using XPath transforms. A mitigation has been put in place to restrict the number of transforms and to restrict transforms to only the transform-algorithms mentioned in the SAML 2.0 Core Specifications (and specifically refuse XPath transforms).
An attacker is able to send specially crafted messages to any entity relying on SimpleSAMLphp (or directly on this SAML2-library) to be able to perform a Denial-of-Service attack.
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