HIGH8.1
GHSA-g888-g2pp-82hf
SimpleSAMLphp saml2 incorrect signature validation
Quick fix
GHSA-g888-g2pp-82hf — simplesamlphp/saml2: upgrade to the fixed version with the command below.
composer require simplesamlphp/saml2:^1.10.6Details
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.
Are you affected?
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Affected packages
Packagist/simplesamlphp/saml2
Introduced in:
0Fixed in: 1.10.6Fix
composer require simplesamlphp/saml2:^1.10.6Packagist/simplesamlphp/saml2
Introduced in:
2.0Fixed in: 2.3.8Fix
composer require simplesamlphp/saml2:^2.3.8Packagist/simplesamlphp/saml2
Introduced in:
3.0Fixed in: 3.1.4Fix
composer require simplesamlphp/saml2:^3.1.4References
- https://nvd.nist.gov/vuln/detail/CVE-2018-7711[ADVISORY]
- https://github.com/simplesamlphp/saml2/commit/4f6af7f69f29df8555a18b9bb7b646906b45924d[WEB]
- https://github.com/FriendsOfPHP/security-advisories/blob/master/simplesamlphp/saml2/CVE-2018-7711.yaml[WEB]
- https://lists.debian.org/debian-lts-announce/2018/03/msg00017.html[WEB]
- https://simplesamlphp.org/security/201803-01[WEB]