CVE-2017-12868 json
SimpleSAMLphp Session fixation issue and authentication bypass in the authcrypt module
published 2017-09-01 9 y ago modified 2026-06-17 4 mo ago also GHSA-j96g-47x2-46hv , EUVD-2022-4319
- cvss
- 9.8
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.1%
- EPSS 2.1% chance of exploitation in 30 days, percentile 82%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- packagist simplesamlphp/simplesamlphp 1.14.14
- simplesamlphp Debian 14, Debian 12 1.14.15-1
debian advisories DEBIAN-CVE-2017-12868
Exploit prediction
2.13% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | simplesamlphp/simplesamlphp | >=1.14.12, <1.14.14 |
1.14.14 |
Classification
- Weakness
-
- CWE-384 Session Fixation
References
-
github.com
/simplesamlphp/simplesamlphp/commit/4bc629658e7b7d17c9ac3fe0da7dc5df71f1b85e
web, issue-tracking, patch, third-party-advisory
-
simplesamlphp.org
/security/201705-01
web, patch, vendor-advisory
-
lists.debian.org
/debian-lts-announce/2017/12/msg00007.html
mailing-list, web
-
lists.debian.org
/debian-lts-announce/2018/06/msg00017.html
mailing-list, web
-
nvd.nist.gov
/vuln/detail/CVE-2017-12868
advisory
-
github.com
/FriendsOfPHP/security-advisories/blob/master/simplesamlphp/simplesamlphp/CVE-2017-12868.yaml
web
-
github.com
/simplesamlphp/simplesamlphp
package
Sources
- CVE List CVE-2017-12868
- GitHub Advisory GHSA-j96g-47x2-46hv
- NVD CVE-2017-12868
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.