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 Sep 1, 2017
9.8
CRITICALCVSS 3.0
EPSS 2.13%
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
No data.
- ≤ 1.14.13
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 2.13% (0.02133) | 81.34th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.13% (0.02133) | 79.54th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.36% (0.00363) | 72.58th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.36% (0.00363) | 71.54th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.36% (0.00364) | 67.98th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.02% (0.01018) | 38.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.04% (0.01040) | 28.32th | v1 |
| Jan 6, 2022 | 1.04% (0.01040) | 27.69th | v1 |
| Sep 1, 2021 | 1.04% (0.01040) | 64.49th | v1 |
| Apr 14, 2021 | 1.04% (0.01040) | 0.00th | v1 |
References (7)
- https://github.com/FriendsOfPHP/security-advisories/blob/master/simplesamlphp/simplesamlphp/CVE-2017-12868.yaml
- https://github.com/advisories/GHSA-j96g-47x2-46hv Advisory
- https://github.com/simplesamlphp/simplesamlphp/commit/4bc629658e7b7d17c9ac3fe0da7dc5df71f1b85e x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2017/12/msg00007.html mailing-listx_refsource_MLIST
- https://lists.debian.org/debian-lts-announce/2018/06/msg00017.html mailing-listx_refsource_MLIST
- https://nvd.nist.gov/vuln/detail/CVE-2017-12868
- https://simplesamlphp.org/security/201705-01 x_refsource_CONFIRMPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/FriendsOfPHP/security-advisories/blob/master/simplesamlphp/simplesamlphp/CVE-2017-12868.yaml | ||
| https://github.com/advisories/GHSA-j96g-47x2-46hv | Advisory | |
| https://github.com/simplesamlphp/simplesamlphp/commit/4bc629658e7b7d17c9ac3fe0da7dc5df71f1b85e | x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory | |
| https://lists.debian.org/debian-lts-announce/2017/12/msg00007.html | mailing-listx_refsource_MLIST | |
| https://lists.debian.org/debian-lts-announce/2018/06/msg00017.html | mailing-listx_refsource_MLIST | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-12868 | ||
| https://simplesamlphp.org/security/201705-01 | x_refsource_CONFIRMPatchVendor Advisory |
Change history (0)
No recorded changes yet.