Session Fixation Affecting simplesamlphp package, versions <1.14.15-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published19 Jul 2026
- disclosed1 Sept 2017
Introduced: 1 Sep 2017
CVE-2017-12868 (opens in a new tab)How to fix?
Upgrade Echo:latest simplesamlphp to version 1.14.15-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream simplesamlphp package and not the simplesamlphp package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
The secureCompare method in lib/SimpleSAML/Utils/Crypto.php in SimpleSAMLphp 1.14.13 and earlier, when used with PHP before 5.6, allows attackers to conduct session fixation attacks or possibly bypass authentication by leveraging missing character conversions before an XOR operation.
References
- https://advisory.echohq.com/cve/CVE-2017-12868
- https://www.cve.org/CVERecord?id=CVE-2017-12868
- https://github.com/simplesamlphp/simplesamlphp/commit/4bc629658e7b7d17c9ac3fe0da7dc5df71f1b85e
- https://lists.debian.org/debian-lts-announce/2017/12/msg00007.html
- https://lists.debian.org/debian-lts-announce/2018/06/msg00017.html
- https://simplesamlphp.org/security/201705-01