Apple Mac OS X up to 10.11.0 Disk Images memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Apple Mac OS X up to 10.11.0. Affected by this issue is some unknown functionality of the component Disk Images. Such manipulation leads to memory corruption. This vulnerability is traded as CVE-2015-6995. Furthermore, there is an exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple Mac OS X up to 10.11.0 (Operating System). It has been rated as critical. Affected by this issue is some unknown functionality of the component Disk Images. 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:

The Disk Images component in Apple iOS before 9.1 and OS X before 10.11.1 misparses images, which allows attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted app.

The weakness was shared 10/21/2015 by Ian Beer with Google Project Zero as HT205375 as confirmed advisory (Website). The advisory is available at support.apple.com. This vulnerability is handled as CVE-2015-6995 since 09/16/2015. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are unknown but a public exploit is available. The advisory points out:

A memory corruption issue existed in the parsing of disk images. This issue was addressed through improved memory handling.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 86654 (Mac OS X < 10.11.1 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family MacOS X Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 124182 (Apple Mac OS X Security Update 2015-007 Not Installed (APPLE-SA-2015-10-21-4)).

Upgrading to version 10.11.1 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 Exploit-DB (39381), Tenable (86654), SecurityFocus (BID 77263†) and Vulnerability Center (SBV-53873†). The entries VDB-77709, VDB-78724, VDB-78725 and VDB-78727 are related to this item. If you want to get best quality of vulnerability data, you may have to visit VulDB.

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CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
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: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 86654
Nessus Name: Mac OS X < 10.11.1 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Mac OS X 10.11.1

Timelineinfo

09/16/2015 🔍
10/21/2015 +35 days 🔍
10/21/2015 +0 days 🔍
10/21/2015 +0 days 🔍
10/21/2015 +0 days 🔍
10/22/2015 +1 days 🔍
10/22/2015 +0 days 🔍
10/23/2015 +1 days 🔍
12/31/2024 +3357 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT205375
Researcher: Ian Beer
Organization: Google Project Zero
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-6995 (🔍)
GCVE (CVE): GCVE-0-2015-6995
GCVE (VulDB): GCVE-100-78794
SecurityFocus: 77263 - Apple iOS and Mac OS X Multiple Security Vulnerabilities
SecurityTracker: 1033929
Vulnerability Center: 53873 - Apple iOS <9.1 Remote Code Execution in Disk Images, Medium

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

Entryinfo

Created: 10/22/2015 11:24
Updated: 12/31/2024 09:00
Changes: 10/22/2015 11:24 (67), 02/17/2018 09:31 (5), 06/24/2022 12:22 (3), 06/24/2022 12:29 (1), 11/18/2024 16:07 (16), 12/31/2024 09:00 (11)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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