CVE-2016-7056

openssl: ECDSA P-256 timing attack key recovery

Severity Score

5.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Se ha encontrado un error de ataque de sincronización en OpenSSL, en versiones 1.0.1u y anteriores, que podría permitir que un usuario malicioso con acceso local recupere claves privadas ECDSA P-256

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

Red Hat JBoss Core Services is a set of supplementary software for Red Hat JBoss middleware products. This software, such as Apache HTTP Server, is common to multiple JBoss middleware products, and is packaged under Red Hat JBoss Core Services to allow for faster distribution of updates, and for a more consistent update experience. This release of Red Hat JBoss Core Services Apache HTTP Server 2.4.23 Service Pack 1 serves as a replacement for Red Hat JBoss Core Services Apache HTTP Server 2.4.23, and includes bug fixes, which are documented in the Release Notes document linked to in the References.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-08-23 CVE Reserved
2017-01-30 CVE Published
2024-08-06 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-320: Key Management Errors
CWE-385: Covert Timing Channel

CAPEC

References (18)

URL	Tag	Source
http://www.securityfocus.com/bid/95375	Third Party Advisory
https://eprint.iacr.org/2016/1195	Third Party Advisory
https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=8aed2a7548362e88e84a7feb795a3a97e8395008	X_refsource_confirm
https://seclists.org/oss-sec/2017/q1/52	Mailing List

URL	Date	SRC

URL	Date	SRC
http://www.securitytracker.com/id/1037575	2023-02-12
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7056	2023-02-12
https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/033_libcrypto.patch.sig	2023-02-12
https://ftp.openbsd.org/pub/OpenBSD/patches/6.0/common/016_libcrypto.patch.sig	2023-02-12
https://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-7056.html	2023-02-12
https://security-tracker.debian.org/tracker/CVE-2016-7056	2023-02-12

URL	Date	SRC
http://rhn.redhat.com/errata/RHSA-2017-1415.html	2023-02-12
https://access.redhat.com/errata/RHSA-2017:1413	2023-02-12
https://access.redhat.com/errata/RHSA-2017:1414	2023-02-12
https://access.redhat.com/errata/RHSA-2017:1801	2023-02-12
https://access.redhat.com/errata/RHSA-2017:1802	2023-02-12
https://www.debian.org/security/2017/dsa-3773	2023-02-12
https://access.redhat.com/security/cve/CVE-2016-7056	2017-07-25
https://bugzilla.redhat.com/show_bug.cgi?id=1412120	2017-07-25

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Openssl Search vendor "Openssl"		Openssl Search vendor "Openssl" for product "Openssl"				<= 1.0.1u Search vendor "Openssl" for product "Openssl" and version " <= 1.0.1u"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				6.0 Search vendor "Redhat" for product "Enterprise Linux" and version "6.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				7.0 Search vendor "Redhat" for product "Enterprise Linux" and version "7.0"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				12.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "12.04"		esm		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04"		lts		Affected