What’s Vulnerable › Vulnerabilities

CVE-2016-2178

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-06-20 · updated 2026-06-17
• Weakness: CWE-203

Description

The dsa_sign_setup function in crypto/dsa/dsa_ossl.c in OpenSSL through 1.0.2h does not properly ensure the use of constant-time operations, which makes it easier for local users to discover a DSA private key via a timing side-channel attack.

Affected products

• Canonical Ubuntu Linux: 12.04, 14.04, 16.04
• Debian Linux: 8.0
• Node.js: from 0.10.0 before 0.10.47; from 0.12.0 before 0.12.16; from 4.0.0 through 4.1.2; from 4.2.0 before 4.6.0; from 5.0.0 before 6.7.0 — fixed in 0.10.47, 0.12.16, 4.6.0, 6.7.0
• OpenSSL: 1.0.1, 1.0.1a, 1.0.1b, 1.0.1c, 1.0.1d, 1.0.1e (+24)
• Oracle Corporation Oracle Linux: 5, 6, 7
• Oracle Corporation Solaris Operating System: 10, 11.3
• SUSE Linux Enterprise: 12.0

How to fix

Upgrade to a fixed version: Node.js 0.10.47, 0.12.16, 4.6.0, 6.7.0. Check the vendor advisory for mitigations.

References

• http://eprint.iacr.org/2016/594.pdf
• http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
• http://lists.opensuse.org/opensuse-security-announce/2016-09/msg00022.html
• http://lists.opensuse.org/opensuse-security-announce/2016-09/msg00023.html
• http://lists.opensuse.org/opensuse-security-announce/2016-09/msg00024.html
• http://lists.opensuse.org/opensuse-security-announce/2016-09/msg00031.html
• http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00005.html
• http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00011.html
• http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00012.html
• http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00013.html
• http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00021.html
• http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00029.html

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