Apple iOS up to 9.2 TrueTypeScaler memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.6$5k-$25k0.00

Summaryinfo

A vulnerability has been found in Apple iOS up to 9.2 and classified as critical. Affected by this issue is some unknown functionality of the component TrueTypeScaler. This manipulation causes memory corruption. This vulnerability is handled as CVE-2016-1775. It is possible to launch the attack on the local host. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Apple iOS up to 9.2 (Smartphone Operating System). It has been declared as critical. Affected by this vulnerability is an unknown part of the component TrueTypeScaler. 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 summary by CVE is:

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 released 03/21/2016 by Juwei Lin (0x1byte) with Zero Day Initiative (ZDI) as HT206166 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is known as CVE-2016-1775 since 01/13/2016. 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 pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 11/12/2024). It is expected to see the exploit prices for this product increasing in the near future. 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 9.3 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 22677.

The vulnerability is also documented in the databases at Tenable (90309), SecurityFocus (BID 85061†) and Vulnerability Center (SBV-57666†). Entries connected to this vulnerability are available at VDB-79545, VDB-79546, VDB-79547 and VDB-79553. Be aware that VulDB is the high quality source for vulnerability data.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
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: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
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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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: iOS 9.3
TippingPoint: 🔍

Timelineinfo

01/13/2016 🔍
03/21/2016 +68 days 🔍
03/21/2016 +0 days 🔍
03/21/2016 +0 days 🔍
03/22/2016 +1 days 🔍
03/22/2016 +0 days 🔍
03/23/2016 +0 days 🔍
03/23/2016 +0 days 🔍
04/01/2016 +9 days 🔍
11/12/2024 +3147 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT206166
Researcher: Juwei Lin (0x1byte)
Organization: Zero Day Initiative (ZDI)
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-1775 (🔍)
GCVE (CVE): GCVE-0-2016-1775
GCVE (VulDB): GCVE-100-81511
SecurityFocus: 85061 - Apple Mac OS X/watchOS/iOS/tvOS Multiple Security Vulnerabilities
SecurityTracker: 1035353
Vulnerability Center: 57666 - Apple iOS <9.3 Remote Code Execution in TrueTypeScaler, Critical

scip Labs: https://www.scip.ch/en/?labs.20150917
See also: 🔍

Entryinfo

Created: 03/23/2016 12:44
Updated: 11/12/2024 01:05
Changes: 03/23/2016 12:44 (76), 02/02/2019 11:31 (15), 07/11/2022 13:34 (3), 11/12/2024 01:05 (16)
Complete: 🔍
Cache ID: 216::103

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

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