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-$25k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Apple iOS up to 9.0. This issue affects some unknown processing of the component CoreText. The manipulation as part of Font File leads to memory corruption. This vulnerability is documented as CVE-2015-6992. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple iOS up to 9.0 (Smartphone Operating System). It has been rated as critical. This issue affects some unknown functionality of the component CoreText. The manipulation as part of a Font File 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.

The weakness was released 10/21/2015 by John Villamil with Yahoo Pentest Team as HT205370 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. The identification of this vulnerability is CVE-2015-6992 since 09/16/2015. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. 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 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 86602 (Apple iTunes < 12.3.1 Multiple Vulnerabilities (credentialed check)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows. The commercial vulnerability scanner Qualys is able to test this issue with plugin 124172 (Apple Mac OS X v10.11.1 Not Installed (APPLE-SA-2015-10-21-4)).

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 vulnerability database at Tenable (86602). Entries connected to this vulnerability are available at VDB-68857, VDB-74877, VDB-74936 and VDB-78625. Statistical analysis made it clear that VulDB provides the best quality 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: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

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: 86602
Nessus Name: Apple iTunes < 12.3.1 Multiple Vulnerabilities (credentialed 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 Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: iOS 9.1

Timelineinfo

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 🔍

Sourcesinfo

Vendor: apple.com

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

CVE: CVE-2015-6992 (🔍)
GCVE (CVE): GCVE-0-2015-6992
GCVE (VulDB): GCVE-100-78731
SecurityTracker: 1033929

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

Entryinfo

Created: 10/22/2015 10:29
Updated: 06/24/2022 00:16
Changes: 10/22/2015 10:29 (61), 02/12/2018 08:17 (8), 06/24/2022 00:02 (4), 06/24/2022 00:16 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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