CVE-2016-8671

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.

• CWE-200

• 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

Published

Jan 13, 2017

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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