Session Fixation The advisory has been revoked - it doesn't affect any version of package simplesamlphp (opens in a new tab)
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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Test your applications- Snyk IDSNYK-UBUNTU1910-SIMPLESAMLPHP-660951
- published1 Sept 2017
- disclosed1 Sept 2017
Introduced: 1 Sep 2017
CVE-2017-12868 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:19.10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream simplesamlphp package and not the simplesamlphp package as distributed by Ubuntu.
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
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-12868
- https://simplesamlphp.org/security/201705-01
- https://lists.debian.org/debian-lts-announce/2017/12/msg00007.html
- https://lists.debian.org/debian-lts-announce/2018/06/msg00017.html
- https://security-tracker.debian.org/tracker/CVE-2017-12868
- https://github.com/simplesamlphp/simplesamlphp/commit/4bc629658e7b7d17c9ac3fe0da7dc5df71f1b85e