What’s Vulnerable › Vulnerabilities

CVE-2016-7056

• Severity: medium (CVSS 5.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-09-10 · updated 2026-06-17
• Weakness: CWE-385

Description

A timing attack flaw was found in OpenSSL 1.0.1u and before that could allow a malicious user with local access to recover ECDSA P-256 private keys.

Affected products

• Canonical Ubuntu Linux: 12.04, 14.04
• Debian Linux: 8.0, 9.0
• OpenSSL: through 1.0.1u
• Red Hat Enterprise Linux: 6.0, 7.0

References

• http://rhn.redhat.com/errata/RHSA-2017-1415.html
• http://www.securityfocus.com/bid/95375
• http://www.securitytracker.com/id/1037575
• https://access.redhat.com/errata/RHSA-2017:1413
• https://access.redhat.com/errata/RHSA-2017:1414
• https://access.redhat.com/errata/RHSA-2017:1801
• https://access.redhat.com/errata/RHSA-2017:1802
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7056
• https://eprint.iacr.org/2016/1195
• https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/033_libcrypto.patch.sig
• https://ftp.openbsd.org/pub/OpenBSD/patches/6.0/common/016_libcrypto.patch.sig
• https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=8aed2a7548362e88e84a7feb795a3a97e8395008

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