What’s Vulnerable › Vulnerabilities

CVE-2016-7440

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-12-13 · updated 2026-06-17

Description

The C software implementation of AES Encryption and Decryption in wolfSSL (formerly CyaSSL) before 3.9.10 makes it easier for local users to discover AES keys by leveraging cache-bank timing differences.

Affected products

• Debian Linux: 8.0
• MariaDB: from 5.5.0 before 5.5.53; from 10.0.0 before 10.0.28; from 10.1.0 before 10.1.19 — fixed in 10.0.28, 10.1.19, 5.5.53
• MySQL Server: from 5.5.0 through 5.5.52; from 5.6.0 through 5.6.33; from 5.7.0 through 5.7.15
• wolfSSL: before 3.9.10 — fixed in 3.9.10

How to fix

Upgrade to a fixed version: MariaDB 10.0.28, 10.1.19, 5.5.53; wolfSSL 3.9.10. Check the vendor advisory for mitigations.

References

• http://www.debian.org/security/2016/dsa-3706
• http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
• http://www.securityfocus.com/bid/93659
• http://www.securitytracker.com/id/1037050
• https://mariadb.com/kb/en/mariadb/mariadb-10028-release-notes/
• https://wolfssl.com/wolfSSL/Blog/Entries/2016/9/26_wolfSSL_3.9.10_Vulnerability_Fixes.html
• http://www.debian.org/security/2016/dsa-3706
• http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
• http://www.securityfocus.com/bid/93659
• http://www.securitytracker.com/id/1037050
• https://mariadb.com/kb/en/mariadb/mariadb-10028-release-notes/
• https://wolfssl.com/wolfSSL/Blog/Entries/2016/9/26_wolfSSL_3.9.10_Vulnerability_Fixes.html

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