CVE-2016-8671

MEDIUM

MatrixSSL <3.8.6 - RCE

Title source: llm

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.

References (4)

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2016/10/15/2

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2016/10/15/8

[Various Sources] https://blog.fuzzing-project.org/54-Update-on-MatrixSSL-miscalculation-CVE-2016-8671%2C-incomplete-fix-for-CVE-2016-6887.html

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/95439

Scores

CVSS v3 5.9

EPSS 0.0037

EPSS Percentile 58.6%

Attack Vector NETWORK

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Classification

CWE

CWE-200

Status published

Affected Products (2)

matrixssl/matrixssl < 3.8.6

n/a/n/a

Timeline

Published Jan 13, 2017

Tracked Since Feb 18, 2026