What’s Vulnerable › Vulnerabilities

CVE-2017-12868

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-09-01 · updated 2026-06-17
• Weakness: CWE-384

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.

Affected products

• simplesamlphp: through 1.14.13

References

• 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
• 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

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