Apple Mac OS X up to 10.11.3 Messages cryptographic issues

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CTI Interest Score
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A vulnerability has been found in Apple Mac OS X up to 10.11.3 (Operating System) and classified as problematic. Affected by this vulnerability is an unknown code of the component Messages. The manipulation with an unknown input leads to a cryptographic issues vulnerability. The CWE definition for the vulnerability is CWE-310. As an impact it is known to affect confidentiality. The summary by CVE is:

Messages in Apple iOS before 9.3, OS X before 10.11.4, and watchOS before 2.2 does not properly implement a cryptographic protection mechanism, which allows remote attackers to read message attachments via vectors related to duplicate messages.

The weakness was presented 03/21/2016 by Matt as HT206167 as confirmed advisory (Website). It is possible to read the advisory at This vulnerability is known as CVE-2016-1788 since 01/12/2016. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600 according to MITRE ATT&CK. The advisory points out:

A cryptographic issue was addressed by rejecting duplicate messages on the client.

The vulnerability scanner Nessus provides a plugin with the ID 90096 (Mac OS X 10.11.x < 10.11.4 Multiple Vulnerabilities), 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.

Upgrading to version 10.11.4 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (90096). See 68484, 73556, 81414 and 81421 for similar entries.








  • end of life

CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 5.9
VulDB Temp Score: 5.7
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NVD Base Score: 5.9
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Class: Cryptographic issues
CWE: CWE-310
ATT&CK: T1600

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 90096
Nessus Name: Mac OS X 10.11.x < 10.11.4 Multiple Vulnerabilities
Nessus File: 🔍
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OpenVAS ID: 801105
OpenVAS Name: Apple Mac OS X Multiple Vulnerabilities-01 March-2016
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OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Recommended: Upgrade
Status: 🔍

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Upgrade: Mac OS X 10.11.4


01/12/2016 🔍
03/21/2016 +68 days 🔍
03/21/2016 +0 days 🔍
03/21/2016 +0 days 🔍
03/22/2016 +1 days 🔍
03/23/2016 +0 days 🔍
07/11/2022 +2301 days 🔍



Advisory: HT206167
Researcher: Matt
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-1788 (🔍)
SecurityTracker: 1035353
SecurityFocus: 71820

scip Labs:
See also: 🔍


Created: 03/23/2016 12:38 PM
Updated: 07/11/2022 09:00 AM
Changes: 03/23/2016 12:38 PM (59), 09/09/2018 11:27 AM (20), 07/11/2022 09:00 AM (4)
Complete: 🔍


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