Apple tvOS up to 10.0 FontParser memory corruption

CVSS Meta Temp Score
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7.4$0-$5k0.00

A vulnerability was found in Apple tvOS up to 10.0 (Digital Media Player). It has been declared as critical. Affected by this vulnerability is an unknown function of the component FontParser. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability.

The bug was discovered 01/23/2017. The weakness was published 12/13/2016 as HT207425 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is known as CVE-2016-4688 since 05/11/2016. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The advisory points out:

A buffer overflow existed in the handling of font files. This issue was addressed through improved bounds checking.

The vulnerability scanner Nessus provides a plugin with the ID 95917 (macOS 10.12.x < 10.12.2 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 10.1 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 (95917). Similar entries are available at 87463, 91385, 91659 and 93042.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 95917
Nessus Name: macOS 10.12.x < 10.12.2 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 801105
OpenVAS Name: Apple Mac OS X Multiple Vulnerabilities-03 February-2017
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: tvOS 10.1

Timelineinfo

05/11/2016 🔍
11/27/2016 +200 days 🔍
12/13/2016 +16 days 🔍
12/13/2016 +0 days 🔍
12/14/2016 +1 days 🔍
12/16/2016 +2 days 🔍
01/23/2017 +38 days 🔍
02/20/2017 +28 days 🔍
10/06/2022 +2054 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT207425
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-4688 (🔍)
SecurityTracker: 1037469
SecurityFocus: 94572 - Apple iOS/macOS/tvOS/watchOS CVE-2016-4688 Buffer Overflow Vulnerability

See also: 🔍

Entryinfo

Created: 12/14/2016 12:18
Updated: 10/06/2022 14:43
Changes: 12/14/2016 12:18 (56), 07/06/2019 10:51 (24), 10/06/2022 14:43 (4)
Complete: 🔍

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