HOMEVULNERABILITIESCVE-2017-12868
CRITICAL

CVE-2017-12868

CWE-384Published: September 1, 2017· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2017-12868 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

PHP1 product(s)
php
simplesamlphp1 product(s)
simplesamlphp
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/simplesamlphp/simplesamlphp/commit/4bc629658e7b7d17c9ac3fe0da7dc5df71f1b85e
PATCHhttps://simplesamlphp.org/security/201705-01
PATCHhttps://github.com/simplesamlphp/simplesamlphp/commit/4bc629658e7b7d17c9ac3fe0da7dc5df71f1b85e
PATCHhttps://simplesamlphp.org/security/201705-01

All References (8)

→
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

Quick Facts

CVE IDCVE-2017-12868
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-384
CISA KEVNo
Affected2 vendor(s)
PublishedSep 1, 2017

Related CVEs (CWE-384)

CVE-2024-11317
10.0
CVE-2021-20151
10.0
CVE-2024-8643
9.8
CVE-2017-12965
9.8
CVE-2024-38513
9.8
CVE-2019-18418
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2017-12868 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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