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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 1.15.4-1 |
| debian | bullseye | fixed | 1.15.4-1 |
| debian | sid | fixed | 1.15.4-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| 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 |
References
- 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
- https://security-tracker.debian.org/tracker/CVE-2018-7711
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.