Apple Mac OS X up to 10.11.3 TrueTypeScaler memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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8.7$0-$5k0.00

A vulnerability was found in Apple Mac OS X up to 10.11.3 (Operating System) and classified as very critical. Affected by this issue is some unknown functionality of the component TrueTypeScaler. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

TrueTypeScaler in Apple iOS before 9.3, OS X before 10.11.4, tvOS before 9.2, and watchOS before 2.2 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted font file.

The weakness was disclosed 03/21/2016 with Zero Day Initiative (ZDI) as HT206167 as confirmed advisory (Website). The advisory is available at support.apple.com. This vulnerability is handled as CVE-2016-1775 since 01/12/2016. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 11/12/2024). The advisory points out:

A memory corruption issue existed in the processing of font files. This issue was addressed through improved input validation.

The vulnerability scanner Nessus provides a plugin with the ID 90309 (Apple TV < 9.2 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 124842 (Apple Mac OS X v10.11.4 and Security Update 2016-002 Not Installed (APPLE-SA-2016-03-21-5)).

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 databases at Tenable (90309) and SecurityFocus (BID 75570†). The entries VDB-77250, VDB-79545, VDB-79546 and VDB-79547 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.9
VulDB Meta Temp Score: 8.7

VulDB Base Score: 10.0
VulDB Temp Score: 9.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

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Current Price Estimation: 🔍

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Nessus ID: 90309
Nessus Name: Apple TV < 9.2 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

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

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Mac OS X 10.11.4

Timelineinfo

01/12/2016 🔍
03/21/2016 +68 days 🔍
03/21/2016 +0 days 🔍
03/23/2016 +2 days 🔍
03/23/2016 +0 days 🔍
04/01/2016 +8 days 🔍
11/12/2024 +3147 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT206167
Organization: Zero Day Initiative (ZDI)
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-1775 (🔍)
GCVE (CVE): GCVE-0-2016-1775
GCVE (VulDB): GCVE-100-81482
SecurityFocus: 75570
SecurityTracker: 1035353

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

Entryinfo

Created: 03/23/2016 12:12 PM
Updated: 11/12/2024 01:05 AM
Changes: 03/23/2016 12:12 PM (57), 09/09/2018 11:29 AM (21), 07/11/2022 10:06 AM (3), 11/12/2024 01:05 AM (16)
Complete: 🔍
Cache ID: 18:C57:40

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