Apple macOS up to 10.12.3 OpenSSH key management

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Apple macOS up to 10.12.3. It has been classified as critical. This issue affects some unknown processing of the component OpenSSH. The manipulation leads to key management. This vulnerability is listed as CVE-2016-10011. The attack must be carried out locally. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Apple macOS up to 10.12.3 (Operating System) and classified as critical. This issue affects an unknown code block of the component OpenSSH. 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:

authfile.c in sshd in OpenSSH before 7.4 does not properly consider the effects of realloc on buffer contents, which might allow local users to obtain sensitive private-key information by leveraging access to a privilege-separated child process.

The bug was discovered 12/19/2016. The weakness was presented 03/27/2017 by Jann Horn as HT207615 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. The identification of this vulnerability is CVE-2016-10011 since 12/19/2016. The exploitation is known to be easy. Attacking locally is a requirement. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600.001 according to MITRE ATT&CK. The advisory points out:

Multiple issues existed in OpenSSH before version 7.4. These were addressed by updating OpenSSH to version 7.4.

The vulnerability was handled as a non-public zero-day exploit for at least 16 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 102751 (CentOS 7 : openssh (CESA-2017:2029)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197025 (Ubuntu Security Notification for Openssh Vulnerabilities (USN-3538-1)).

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 (102751), SecurityFocus (BID 94977†) and CERT Bund (WID-SEC-2023-1996). See VDB-94607, VDB-94608, VDB-94609 and VDB-94610 for similar entries. Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Amazon Linux 2
  • FreeBSD Project FreeBSD OS
  • IBM AIX
  • Juniper JUNOS
  • Red Hat Enterprise Linux
  • NetApp Data ONTAP
  • Open Source OpenSSH
  • Ubuntu Linux
  • SUSE Linux
  • IBM VIOS
  • Palo Alto Networks PAN-OS
  • EMC Avamar
  • Dell NetWorker
  • Moxa Switch

Productinfo

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Vendor

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.7

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

ADP CISA Base Score: 6.2
ADP CISA Vector: 🔍

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: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 102751
Nessus Name: CentOS 7 : openssh (CESA-2017:2029)
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: 🔍

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: github.com

Timelineinfo

12/19/2016 🔍
12/19/2016 +0 days 🔍
12/20/2016 +1 days 🔍
01/04/2017 +15 days 🔍
03/27/2017 +82 days 🔍
03/27/2017 +0 days 🔍
03/28/2017 +1 days 🔍
08/25/2017 +150 days 🔍
05/30/2026 +3200 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT207615
Researcher: Jann Horn
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-10011 (🔍)
GCVE (CVE): GCVE-0-2016-10011
GCVE (VulDB): GCVE-100-98663

OVAL: 🔍

SecurityFocus: 94977 - OpenSSH CVE-2016-10011 Local Information Disclosure Vulnerability
OSVDB: - CVE-2016-10011 - OpenSSH - Information Disclosure Issue
SecurityTracker: 1037490
CERT Bund: WID-SEC-2023-1996 - OpenSSH: Mehrere Schwachstellen

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

Entryinfo

Created: 03/28/2017 11:18
Updated: 05/30/2026 03:30
Changes: 03/28/2017 11:18 (81), 08/21/2020 14:57 (7), 11/20/2022 09:36 (5), 01/09/2026 20:44 (21), 05/30/2026 03:30 (12)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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