CVE-2017-12868

Name: CVE-2017-12868
Creator: NVD / NIST
Published: 2017-09-01T13:29:00.24+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.13%

Last modified Jun 17, 2026

CVE-2017-12868 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 2.13% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

2.13%

79.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-384

Affected Software

Vendor	Product	Versions
Simplesamlphp	Simplesamlphp	<= 1.14.13

References

https://github.com/simplesamlphp/simplesamlphp/commit/4bc629658e7b7d17c9ac3fe0da7dc5df71f1b85eIssue Tracking, Patch, Third Party Advisory
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/201705-01Patch, Vendor Advisory
https://github.com/simplesamlphp/simplesamlphp/commit/4bc629658e7b7d17c9ac3fe0da7dc5df71f1b85eIssue Tracking, Patch, Third Party Advisory
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/201705-01Patch, Vendor Advisory

Timeline

Published: Sep 1, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-12868?

How severe is CVE-2017-12868?

Severity scoring for CVE-2017-12868 is pending analysis. The EPSS model estimates a 2.13% probability of exploitation in the next 30 days.

How do I fix CVE-2017-12868?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-12868?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST