VulnerabilityModified
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.
MEDIUM 5.5EPSS 0.62%
Does this matter?
Lower severity and a low EPSS score (0.62%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.0
- 5.5 MEDIUMCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.62% probability · 49th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-385, CWE-320
- Affected
- openssl/openssl · debian/debian linux · redhat/enterprise linux · canonical/ubuntu linux
- Source
- secalert@redhat.com
EPSS 0.6% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=8aed2a7548362e88e84a7feb795a3a97e8395008
- 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://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=8aed2a7548362e88e84a7feb795a3a97e8395008
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.