CVE-2017-12871

Name: CVE-2017-12871
Creator: NVD / NIST
Published: 2017-09-01T21:29:00.53+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.49%

Last modified Jun 17, 2026

CVE-2017-12871 is a vulnerability of currently unknown severity. The aesEncrypt method in lib/SimpleSAML/Utils/Crypto.php in SimpleSAMLphp 1.14.x through 1.14.11 makes it easier for context-dependent attackers to bypass the encryption protection mechanism by leveraging use of the first 16 bytes of the secret key as the initialization vector (IV).. EPSS estimates a 0.49% chance of exploitation in the next 30 days.

Description

The aesEncrypt method in lib/SimpleSAML/Utils/Crypto.php in SimpleSAMLphp 1.14.x through 1.14.11 makes it easier for context-dependent attackers to bypass the encryption protection mechanism by leveraging use of the first 16 bytes of the secret key as the initialization vector (IV).

Metrics

EPSS Probability

0.49%

38.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-326

Affected Software

Vendor	Product	Versions
Simplesamlphp	Simplesamlphp	1.14.0
Simplesamlphp	Simplesamlphp	1.14.1
Simplesamlphp	Simplesamlphp	1.14.2
Simplesamlphp	Simplesamlphp	1.14.3
Simplesamlphp	Simplesamlphp	1.14.4
Simplesamlphp	Simplesamlphp	1.14.5
Simplesamlphp	Simplesamlphp	1.14.6
Simplesamlphp	Simplesamlphp	1.14.7
Simplesamlphp	Simplesamlphp	1.14.8
Simplesamlphp	Simplesamlphp	1.14.9
Simplesamlphp	Simplesamlphp	1.14.10
Simplesamlphp	Simplesamlphp	1.14.11

References

https://github.com/simplesamlphp/simplesamlphp/commit/77df6a932d46daa35e364925eb73a175010dc904Issue Tracking, Patch, Third Party Advisory
https://simplesamlphp.org/security/201703-02Issue Tracking, Patch, Third Party Advisory
https://github.com/simplesamlphp/simplesamlphp/commit/77df6a932d46daa35e364925eb73a175010dc904Issue Tracking, Patch, Third Party Advisory
https://simplesamlphp.org/security/201703-02Issue Tracking, Patch, Third Party Advisory

Timeline

Published: Sep 1, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-12871?

How severe is CVE-2017-12871?

Severity scoring for CVE-2017-12871 is pending analysis. The EPSS model estimates a 0.49% probability of exploitation in the next 30 days.

How do I fix CVE-2017-12871?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-12871?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST