Apple Mac OS X up to 10.11.4 Disk Images Memory race condition

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6.3$0-$5k0.00

Summaryinfo

A vulnerability has been found in Apple Mac OS X up to 10.11.4 and classified as problematic. This affects an unknown function of the component Disk Images. Performing a manipulation results in race condition (Memory). This vulnerability is reported as CVE-2016-1807. The attack is possible to be carried out remotely. Moreover, an exploit is present. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, was found in Apple Mac OS X up to 10.11.4 (Operating System). This affects an unknown part of the component Disk Images. The manipulation with an unknown input leads to a race condition vulnerability (Memory). CWE is classifying the issue as CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Race condition in the Disk Images subsystem in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS before 9.2.1, and watchOS before 2.2.1 allows local users to obtain sensitive information from kernel memory via unspecified vectors.

The weakness was disclosed 05/16/2016 by Ian Beer (moony li) with Google Project Zero as HT206567 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is uniquely identified as CVE-2016-1807 since 01/13/2016. The exploitability is told to be easy. Attacking locally is a requirement. A authentication is necessary for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are unknown but a public exploit is available. The advisory points out:

A race condition was addressed through improved locking.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 91311 (Apple TV < 9.2.1 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 122912 (Apple Mac OS X v10.11.5 and Security Update 2016-003 Not Installed (APPLE-SA-2016-05-16-4)).

Upgrading to version 10.11.5 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 Exploit-DB (39929), Tenable (91311) and SecurityFocus (BID 90694†). The entries VDB-87425, VDB-87434, VDB-87435 and VDB-87436 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.3

VulDB Base Score: 8.8
VulDB Temp Score: 7.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.7
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Name: Memory
Class: Race condition / Memory
CWE: CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 91311
Nessus Name: Apple TV < 9.2.1 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 801105
OpenVAS Name: Apple Mac OS X Multiple Vulnerabilities-01 November-2016
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Mac OS X 10.11.5

Timelineinfo

01/13/2016 🔍
05/16/2016 +124 days 🔍
05/16/2016 +0 days 🔍
05/16/2016 +0 days 🔍
05/18/2016 +2 days 🔍
05/20/2016 +2 days 🔍
05/24/2016 +4 days 🔍
12/24/2024 +3136 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT206567
Researcher: Ian Beer (moony li)
Organization: Google Project Zero
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-1807 (🔍)
GCVE (CVE): GCVE-0-2016-1807
GCVE (VulDB): GCVE-100-87447
SecurityFocus: 90694 - Apple Mac OS X/watchOS/iOS Multiple Security Vulnerabilities
SecurityTracker: 1035890

scip Labs: https://www.scip.ch/en/?labs.20150108
See also: 🔍

Entryinfo

Created: 05/18/2016 11:59
Updated: 12/24/2024 05:11
Changes: 05/18/2016 11:59 (62), 11/30/2018 12:02 (29), 08/19/2022 18:01 (4), 12/24/2024 05:11 (14)
Complete: 🔍
Cache ID: 216::103

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