CVE-2016-8671

Severity: medium (CVSS 5.9 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-01-13 · updated 2026-06-17
Weakness: CWE-200

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.

Affected products

Inside Secure MatrixSSL: through 3.8.6

References

http://www.openwall.com/lists/oss-security/2016/10/15/2
http://www.openwall.com/lists/oss-security/2016/10/15/8
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/2016/10/15/2
http://www.openwall.com/lists/oss-security/2016/10/15/8
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

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