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Vulnerability details: VCID-cbsr-m7nk-xkdg
Vulnerability ID VCID-cbsr-m7nk-xkdg
Aliases CVE-2016-7056
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-385 Covert Timing Channel
System Score Found at
cvssv3 5.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-7056.json
epss 0.0012 https://api.first.org/data/v1/epss?cve=CVE-2016-7056
epss 0.0012 https://api.first.org/data/v1/epss?cve=CVE-2016-7056
epss 0.0012 https://api.first.org/data/v1/epss?cve=CVE-2016-7056
epss 0.0012 https://api.first.org/data/v1/epss?cve=CVE-2016-7056
epss 0.0012 https://api.first.org/data/v1/epss?cve=CVE-2016-7056
epss 0.0012 https://api.first.org/data/v1/epss?cve=CVE-2016-7056
epss 0.00122 https://api.first.org/data/v1/epss?cve=CVE-2016-7056
epss 0.00122 https://api.first.org/data/v1/epss?cve=CVE-2016-7056
epss 0.00122 https://api.first.org/data/v1/epss?cve=CVE-2016-7056
epss 0.00122 https://api.first.org/data/v1/epss?cve=CVE-2016-7056
epss 0.00122 https://api.first.org/data/v1/epss?cve=CVE-2016-7056
epss 0.00122 https://api.first.org/data/v1/epss?cve=CVE-2016-7056
epss 0.00122 https://api.first.org/data/v1/epss?cve=CVE-2016-7056
epss 0.00122 https://api.first.org/data/v1/epss?cve=CVE-2016-7056
epss 0.00122 https://api.first.org/data/v1/epss?cve=CVE-2016-7056
epss 0.00122 https://api.first.org/data/v1/epss?cve=CVE-2016-7056
epss 0.00122 https://api.first.org/data/v1/epss?cve=CVE-2016-7056
epss 0.00122 https://api.first.org/data/v1/epss?cve=CVE-2016-7056
cvssv2 4.9 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 2.1 https://nvd.nist.gov/vuln/detail/CVE-2016-7056
cvssv3 5.5 https://nvd.nist.gov/vuln/detail/CVE-2016-7056
archlinux Medium https://security.archlinux.org/AVG-140
archlinux Medium https://security.archlinux.org/AVG-141
Reference id Reference type URL
http://rhn.redhat.com/errata/RHSA-2017-1415.html
https://access.redhat.com/errata/RHSA-2017:1801
https://access.redhat.com/errata/RHSA-2017:1802
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-7056.json
https://api.first.org/data/v1/epss?cve=CVE-2016-7056
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7056
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7056
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8610
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-3731
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://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=8aed2a7548362e88e84a7feb795a3a97e8395008
https://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-7056.html
https://seclists.org/oss-sec/2017/q1/52
https://security-tracker.debian.org/tracker/CVE-2016-7056
https://www.debian.org/security/2017/dsa-3773
http://www.securityfocus.com/bid/95375
http://www.securitytracker.com/id/1037575
1412120 https://bugzilla.redhat.com/show_bug.cgi?id=1412120
AVG-140 https://security.archlinux.org/AVG-140
AVG-141 https://security.archlinux.org/AVG-141
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
CVE-2016-7056 https://nvd.nist.gov/vuln/detail/CVE-2016-7056
RHSA-2017:1413 https://access.redhat.com/errata/RHSA-2017:1413
RHSA-2017:1414 https://access.redhat.com/errata/RHSA-2017:1414
RHSA-2017:1415 https://access.redhat.com/errata/RHSA-2017:1415
USN-3181-1 https://usn.ubuntu.com/3181-1/
No exploits are available.
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-7056.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:L/AC:L/Au:N/C:C/I:N/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2016-7056
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2016-7056
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.31643
EPSS Score 0.0012
Published At Aug. 11, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:42:15.901608+00:00 Ubuntu USN Importer Import https://usn.ubuntu.com/3181-1/ 37.0.0