GHSA-g888-g2pp-82hf
SimpleSAMLphp saml2 incorrect signature validation
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Packagist | simplesamlphp/saml2 | < 1.10.6 | 1.10.6 |
| Packagist | simplesamlphp/saml2 | >= 2.0, < 2.3.8 | 2.3.8 |
| Packagist | simplesamlphp/saml2 | >= 3.0, < 3.1.4 | 3.1.4 |
Details
As written in the advisory (Markdown source, shown as plain text).
HTTPRedirect.php in the saml2 library in SimpleSAMLphp before 1.15.4 has an incorrect check of return values in the signature validation utilities, allowing an attacker to get invalid signatures accepted as valid by forcing an error during validation. This occurs because of a dependency on PHP functionality that interprets a -1 error code as a true boolean value.
References
External links from the advisory. They lead to third-party sites.
- https://nvd.nist.gov/vuln/detail/CVE-2018-7711
- https://github.com/simplesamlphp/saml2/commit/4f6af7f69f29df8555a18b9bb7b646906b45924d
- https://github.com/FriendsOfPHP/security-advisories/blob/master/simplesamlphp/saml2/CVE-2018-7711.yaml
- https://lists.debian.org/debian-lts-announce/2018/03/msg00017.html
- https://simplesamlphp.org/security/201803-01