Apple iOS up to 8.4.0 CoreText memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.0$5k-$25k0.00

Summaryinfo

A vulnerability has been found in Apple iOS up to 8.4.0 and classified as critical. Affected by this vulnerability is an unknown functionality of the component CoreText. This manipulation causes memory corruption. This vulnerability appears as CVE-2015-5761. There is no available exploit. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability has been found in Apple iOS up to 8.4.0 (Smartphone Operating System) and classified as critical. Affected by this vulnerability is an unknown part of the component CoreText. 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:

CoreText in Apple iOS before 8.4.1 and OS X before 10.10.5 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted font file, a different vulnerability than CVE-2015-5755.

The weakness was presented 08/11/2015 by Ilja van Sprundel with Google Project Zero as HT205030 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is known as CVE-2015-5761 since 08/06/2015. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 90315 (Apple TV < 7.2.1 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc.. The commercial vulnerability scanner Qualys is able to test this issue with plugin 124144 (Apple iTunes Prior to 12.3 Multiple Vulnerabilities (APPLE-SA-2015-09-16-3)).

Upgrading to version 8.4.1 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (90315), SecurityFocus (BID 76343†) and SecurityTracker (ID 1033275†). See VDB-73748, VDB-75568, VDB-76201 and VDB-76202 for similar entries. 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: 7.3
VulDB Meta Temp Score: 7.0

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

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 90315
Nessus Name: Apple TV < 7.2.1 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 802962
OpenVAS Name: Apple iTunes Multiple Vulnerabilities Sep15 (Windows)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Upgrade: iOS 8.4.1

Timelineinfo

08/06/2015 🔍
08/11/2015 +5 days 🔍
08/11/2015 +0 days 🔍
08/13/2015 +2 days 🔍
08/14/2015 +1 days 🔍
08/14/2015 +0 days 🔍
08/16/2015 +2 days 🔍
06/09/2022 +2489 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT205030
Researcher: Ilja van Sprundel
Organization: Google Project Zero
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-5761 (🔍)
GCVE (CVE): GCVE-0-2015-5761
GCVE (VulDB): GCVE-100-77143
SecurityFocus: 76343 - Apple Mac OS X and iOS Multiple Security Vulnerabilities
SecurityTracker: 1033275 - Apple iOS Multiple Flaws Let Remote Users Execute Arbitrary Code, Obtain Potentially Sensitive Information, and Deny Service and Let Apps Gain Elevated Privileges

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

Entryinfo

Created: 08/14/2015 12:48
Updated: 06/09/2022 23:53
Changes: 08/14/2015 12:48 (59), 10/09/2017 09:42 (18), 06/09/2022 23:53 (3)
Complete: 🔍
Cache ID: 216::103

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

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