Vulnerabilities > CVE-2016-7612 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Apple Iphone OS
Attack vector
LOCAL Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
An issue was discovered in certain Apple products. iOS before 10.2 is affected. macOS before 10.12.2 is affected. watchOS before 3.1.3 is affected. The issue involves the "Kernel" component. It allows attackers to execute arbitrary code in a privileged context or cause a denial of service (memory corruption) via a crafted app.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Buffer Overflow via Environment Variables This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
- Overflow Buffers Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
- Client-side Injection-induced Buffer Overflow This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
- Filter Failure through Buffer Overflow In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
- MIME Conversion An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.
Exploit-Db
description iOS/macOS - Kernel Double Free due to IOSurfaceRootUserClient not Respecting MIG Ownership Rules. CVE-2017-13861. Dos exploit for Multiple platform file exploits/multiple/dos/43320.txt id EDB-ID:43320 last seen 2017-12-11 modified 2017-12-11 platform multiple port published 2017-12-11 reporter Exploit-DB source https://www.exploit-db.com/download/43320/ title iOS/macOS - Kernel Double Free due to IOSurfaceRootUserClient not Respecting MIG Ownership Rules type dos description MacOS < 10.12.2 / iOS < 10.2 Kernel - ipc_port_t Reference Count Leak Due to Incorrect externalMethod Overrides Use-After-Free. CVE-2016-7612. Dos expl... file exploits/multiple/dos/40955.txt id EDB-ID:40955 last seen 2016-12-22 modified 2016-12-22 platform multiple port published 2016-12-22 reporter Exploit-DB source https://www.exploit-db.com/download/40955/ title MacOS < 10.12.2 / iOS < 10.2 Kernel - ipc_port_t Reference Count Leak Due to Incorrect externalMethod Overrides Use-After-Free type dos
Nessus
| NASL family | MacOS X Local Security Checks |
| NASL id | MACOS_10_12_2.NASL |
| description | The remote host is running a version of macOS that is 10.12.x prior to 10.12.2. It is, therefore, affected by multiple vulnerabilities in the following components : - apache_mod_php - AppleGraphicsPowerManagement - Assets - Audio - Bluetooth - CoreCapture - CoreFoundation - CoreGraphics - CoreMedia External Displays - CoreMedia Playback - CoreStorage - CoreText - curl - Directory Services - Disk Images - FontParser - Foundation - Grapher - ICU - ImageIO - Intel Graphics Driver - IOFireWireFamily - IOAcceleratorFamily - IOHIDFamily - IOKit - IOSurface - Kernel - kext tools - libarchive - LibreSSL - OpenLDAP - OpenPAM - OpenSSL - Power Management - Security - syslog - WiFi - xar Note that successful exploitation of the most serious issues can result in arbitrary code execution. Furthermore, CVE-2016-6304, CVE-2016-7596, and CVE-2016-7604 also affect Mac OS X versions 10.10.5 and 10.11.6. However, this plugin does not check those versions. |
| last seen | 2020-06-01 |
| modified | 2020-06-02 |
| plugin id | 95917 |
| published | 2016-12-16 |
| reporter | This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. |
| source | https://www.tenable.com/plugins/nessus/95917 |
| title | macOS 10.12.x < 10.12.2 Multiple Vulnerabilities |
| code | |
Seebug
| bulletinFamily | exploit |
| description | I have previously detailed the lifetime management paradigms in MIG in the writeups for: CVE-2016-7612 [https://bugs.chromium.org/p/project-zero/issues/detail?id=926] and CVE-2016-7633 [https://bugs.chromium.org/p/project-zero/issues/detail?id=954] If a MIG method returns KERN_SUCCESS it means that the method took ownership of `*all*` the arguments passed to it. If a MIG method returns an error code, then it took ownership of `*none*` of the arguments passed to it. If an IOKit userclient external method takes an async wake mach port argument then the lifetime of the reference on that mach port passed to the external method will be managed by MIG semantics. If the external method returns an error then MIG will assume that the reference was not consumed by the external method and as such the MIG generated coode will drop a reference on the port. IOSurfaceRootUserClient external method 17 (s_set_surface_notify) will drop a reference on the wake_port (via IOUserClient::releaseAsyncReference64) then return an error code if the client has previously registered a port with the same callback function. The external method's error return value propagates via the return value of is_io_connect_async_method back to the MIG generated code which will drop a futher reference on the wake_port when only one was taken. This bug is reachable from the iOS app sandbox as demonstrated by this PoC. Tested on iOS 11.0.3 (11A432) on iPhone 6s (MKQL2CN/A) Tested on MacOS 10.13 (17A365) on MacBookAir5,2 [iosurface_uaf_ios.zip](https://bugs.chromium.org/p/project-zero/issues/attachment?aid=309555) [async_wake_ios.zip ](https://bugs.chromium.org/p/project-zero/issues/attachment?aid=315907) |
| id | SSV:96991 |
| last seen | 2017-12-25 |
| modified | 2017-12-15 |
| published | 2017-12-15 |
| reporter | Root |
| title | iOS/MacOS kernel double free due to IOSurfaceRootUserClient not respecting MIG ownership rules(CVE-2017-13861) |