CVE-2016-8671

Name: CVE-2016-8671
Creator: NVD / NIST
Published: 2017-01-13T16:59:00.62+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.34%

Last modified Jun 17, 2026

CVE-2016-8671 is a vulnerability of currently unknown severity. The pstm_exptmod function in MatrixSSL 3.8.6 and earlier does not properly perform modular exponentiation, which might allow remote attackers to predict the secret key via unspecified vectors. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-6887.. EPSS estimates a 1.34% chance of exploitation in the next 30 days.

Description

The pstm_exptmod function in MatrixSSL 3.8.6 and earlier does not properly perform modular exponentiation, which might allow remote attackers to predict the secret key via unspecified vectors. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-6887.

Metrics

EPSS Probability

1.34%

67.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Matrixssl	Matrixssl	<= 3.8.6

References

http://www.openwall.com/lists/oss-security/2016/10/15/2Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/10/15/8Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/95439
https://blog.fuzzing-project.org/54-Update-on-MatrixSSL-miscalculation-CVE-2016-8671%2C-incomplete-fix-for-CVE-2016-6887.html
http://www.openwall.com/lists/oss-security/2016/10/15/2Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/10/15/8Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/95439
https://blog.fuzzing-project.org/54-Update-on-MatrixSSL-miscalculation-CVE-2016-8671%2C-incomplete-fix-for-CVE-2016-6887.html

Timeline

Published: Jan 13, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-8671?

How severe is CVE-2016-8671?

Severity scoring for CVE-2016-8671 is pending analysis. The EPSS model estimates a 1.34% probability of exploitation in the next 30 days.

How do I fix CVE-2016-8671?

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-2016-8671?

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

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Source: NVD / NIST