CVE-2016-7056
MEDIUMCVSS 5.5/10EPSS 0.59%
Last modified
CVE-2016-7056 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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.. EPSS estimates a 0.59% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Openssl | Openssl | <= 1.0.1u |
| Debian | Debian Linux | 8.0 |
| Debian | Debian Linux | 9.0 |
| Redhat | Enterprise Linux | 6.0 |
| Redhat | Enterprise Linux | 7.0 |
| Canonical | Ubuntu Linux | 12.04 |
| Canonical | Ubuntu Linux | 14.04 |
References
- http://rhn.redhat.com/errata/RHSA-2017-1415.htmlThird Party Advisory
- http://www.securityfocus.com/bid/95375Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037575Patch, Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:1413Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1414Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1801Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1802Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7056Issue Tracking, Patch, Third Party Advisory
- https://eprint.iacr.org/2016/1195Third Party Advisory
- https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/033_libcrypto.patch.sigPatch, Third Party Advisory
- https://ftp.openbsd.org/pub/OpenBSD/patches/6.0/common/016_libcrypto.patch.sigPatch, Third Party Advisory
- https://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-7056.htmlPatch, Third Party Advisory
- https://seclists.org/oss-sec/2017/q1/52Mailing List, Third Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2016-7056Patch, Third Party Advisory, VDB Entry
- https://www.debian.org/security/2017/dsa-3773Third Party Advisory
- http://rhn.redhat.com/errata/RHSA-2017-1415.htmlThird Party Advisory
- http://www.securityfocus.com/bid/95375Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037575Patch, Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:1413Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1414Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1801Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1802Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7056Issue Tracking, Patch, Third Party Advisory
- https://eprint.iacr.org/2016/1195Third Party Advisory
- https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/033_libcrypto.patch.sigPatch, Third Party Advisory
- https://ftp.openbsd.org/pub/OpenBSD/patches/6.0/common/016_libcrypto.patch.sigPatch, Third Party Advisory
- https://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-7056.htmlPatch, Third Party Advisory
- https://seclists.org/oss-sec/2017/q1/52Mailing List, Third Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2016-7056Patch, Third Party Advisory, VDB Entry
- https://www.debian.org/security/2017/dsa-3773Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2016-7056?
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.
How severe is CVE-2016-7056?
CVE-2016-7056 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.59% probability of exploitation in the next 30 days.
How do I fix CVE-2016-7056?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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