Apple macOS up to 10.12.3 LibreSSL key management

CVSS Meta Temp Score
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CTI Interest Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Apple macOS up to 10.12.3. This impacts an unknown function of the component LibreSSL. The manipulation leads to key management. This vulnerability is uniquely identified as CVE-2016-7056. Local access is required to approach this attack. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple macOS up to 10.12.3 (Operating System). It has been rated as problematic. This issue affects some unknown processing of the component LibreSSL. The manipulation with an unknown input leads to a key management vulnerability. Using CWE to declare the problem leads to CWE-320. Impacted is confidentiality. The summary by CVE is:

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.

The bug was discovered 01/10/2017. The weakness was disclosed 03/27/2017 as HT207615 as confirmed advisory (Website). The advisory is shared at support.apple.com. The identification of this vulnerability is CVE-2016-7056 since 08/23/2016. An attack has to be approached locally. Required for exploitation is a simple authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1600.001 for this issue. The advisory points out:

A timing side channel allowed an attacker to recover keys. This issue was addressed by introducing constant time computation.

The vulnerability was handled as a non-public zero-day exploit for at least 76 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 99134 (macOS 10.12.x < 10.12.4 Multiple Vulnerabilities (httpoxy)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family MacOS X Local Security Checks and running in the context c. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175949 (Debian Security Update for openssl (DSA 3773-1)).

Upgrading to version 10.12.4 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (99134) and SecurityFocus (BID 95375†). The entries VDB-93073, VDB-93752, VDB-94628 and VDB-95275 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CNA Base Score: 5.5
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Key management
CWE: CWE-320
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 99134
Nessus Name: macOS 10.12.x < 10.12.4 Multiple Vulnerabilities (httpoxy)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 801105
OpenVAS Name: Apple Mac OS X Multiple Vulnerabilities-HT207615
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: macOS 10.12.4
Patch: 8aed2a7548362e88e84a7feb795a3a97e8395008

Timelineinfo

08/23/2016 🔍
01/10/2017 +140 days 🔍
01/10/2017 +0 days 🔍
03/27/2017 +76 days 🔍
03/27/2017 +0 days 🔍
03/28/2017 +1 days 🔍
03/31/2017 +3 days 🔍
09/10/2018 +528 days 🔍
11/20/2022 +1532 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT207615
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-7056 (🔍)
GCVE (CVE): GCVE-0-2016-7056
GCVE (VulDB): GCVE-100-98657

OVAL: 🔍

SecurityFocus: 95375 - OpenSSL CVE-2016-7056 Local Information Disclosure Vulnerability
OSVDB: - CVE-2016-7056 - OpenSSL - Timing Attack Issue
SecurityTracker: 1037575

scip Labs: https://www.scip.ch/en/?labs.20180712
See also: 🔍

Entryinfo

Created: 03/28/2017 11:17
Updated: 11/20/2022 09:17
Changes: 03/28/2017 11:17 (71), 08/21/2020 14:25 (17), 11/20/2022 09:10 (5), 11/20/2022 09:13 (12), 11/20/2022 09:17 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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