A vulnerability has been found in Apple iOS up to 9.0 (Smartphone Operating System) and classified as critical. Affected by this vulnerability is an unknown code block of the component configd. 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:

Heap-based buffer overflow in the DNS client library in configd in Apple iOS before 9.1, OS X before 10.11.1, and watchOS before 2.0.1 allows attackers to execute arbitrary code via a crafted app that sends a spoofed configd response to a client.

The weakness was disclosed 10/21/2015 with PanguTeam as HT205370 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is known as CVE-2015-7015 since 09/16/2015. The exploitation appears to be difficult. 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 pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 06/23/2022). It is expected to see the exploit prices for this product increasing in the near future. The advisory points out:

A heap based buffer overflow issue existed in the DNS client library. A malicious application with the ability to spoof responses from the local configd service may have been able to cause arbitrary code execution in DNS clients.

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 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 (86654). The entries VDB-68857, VDB-74877, VDB-74936 and VDB-77709 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Smartphone Operating System

Vendor

• Apple

Name

• iOS

Version

• 9.0

License

• commercial

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• 🔍

CPE 2.2info

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