Apple iOS up to 9.0 CoreText Font File memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.0$5k-$25k0.08

A vulnerability classified as critical has been found in Apple iOS up to 9.0 (Smartphone Operating System). Affected is an unknown part of the component CoreText. The manipulation as part of a Font File leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The software 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. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was disclosed 10/21/2015 by John Villamil with Yahoo Pentest Team as HT205370 as confirmed advisory (Website). The advisory is shared for download at support.apple.com. This vulnerability is traded as CVE-2015-7017 since 09/16/2015. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 06/24/2022). It is expected to see the exploit prices for this product increasing in the near future. The advisory points out:

Multiple memory corruption issues existed in the handling of font files. These issues were addressed through improved bounds checking.

The vulnerability scanner Nessus provides a plugin with the ID 86603 (Apple iTunes < 12.3.1 Multiple Vulnerabilities (uncredentialed check)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Peer-To-Peer File Sharing. The commercial vulnerability scanner Qualys is able to test this issue with plugin 124198 (Apple iTunes Prior to 12.3.1 Multiple Vulnerabilities (APPLE-SA-2015-10-21-5)).

Upgrading to version 9.1 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 SecurityTracker (ID 1033929) and Tenable (86603). The entries 78724, 78725, 78727 and 78728 are pretty similar.

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VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

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VulDB Base Score: 🔍
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Exploitinginfoedit

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

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 86603
Nessus Name: Apple iTunes < 12.3.1 Multiple Vulnerabilities (uncredentialed check)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 802824
OpenVAS Name: Apple iTunes Multiple Vulnerabilities Nov15 (Windows)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfoedit

Interest: 🔍
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Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Upgrade: iOS 9.1

Timelineinfoedit

09/16/2015 🔍
10/21/2015 +35 days 🔍
10/21/2015 +0 days 🔍
10/22/2015 +1 days 🔍
10/23/2015 +1 days 🔍
06/24/2022 +2435 days 🔍

Sourcesinfoedit

Vendor: apple.com

Advisory: HT205370
Researcher: John Villamil
Organization: Yahoo Pentest Team
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-7017 (🔍)
SecurityTracker: 1033929

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

Entryinfoedit

Created: 10/22/2015 10:29 AM
Updated: 06/24/2022 12:39 AM
Changes: (1) source_nessus_risk
Complete: 🔍

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