CVE-2018-7711

Description

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

https://github.com/simplesamlphp/saml2/commit/4f6af7f69f29df8555a18b9bb7b646906b45924d

https://lists.debian.org/debian-lts-announce/2018/03/msg00017.html

https://simplesamlphp.org/security/201803-01

Details

Risk Information

CVSS v2

CVSS v3