Vulnerability in PHP
CVE-2017-12868
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.021 (81.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 81.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000
Affected products
Weakness classification (CWE)
References
- simplesamlphp.org/security/201705-01 (Patch, Vendor Advisory)
- lists.debian.org/debian-lts-announce/2017/12/msg00007.html (mailing-list)
- github.com/simplesamlphp/simplesamlphp/commit/4bc629658e7b7d17c9ac3fe0da7dc5df7… (Patch, Third Party Advisory, Issue Tracking)
- lists.debian.org/debian-lts-announce/2018/06/msg00017.html (mailing-list)
Frequently asked questions
- What is CVE-2017-12868?
- CVE-2017-12868 is a critical-severity vulnerability in PHP, classified under Session Fixation. CVSS score: 9.8/10. Published 2017-09-01.
- How severe is CVE-2017-12868?
- Critical severity. CVSS v3 base score is 9.8 out of 10.