Vulnerabilities > CVE-2016-4622 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Apple Iphone OS, Safari and Tvos
Attack vector
NETWORK Attack complexity
MEDIUM Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
PARTIAL Availability impact
PARTIAL Summary
WebKit in Apple iOS before 9.3.3, Safari before 9.1.2, and tvOS before 9.2.2 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, a different vulnerability than CVE-2016-4589, CVE-2016-4623, and CVE-2016-4624.
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.
Nessus
NASL family Misc. NASL id APPLETV_9_2_2.NASL description According to its banner, the version of the remote Apple TV device is prior to 9.2.2. It is, therefore, affected by multiple vulnerabilities in the following components : - CoreGraphics - ImageIO - IOAcceleratorFamily - IOHIDFamily - Kernel - libxml2 - libxslt - Sandbox Profiles - WebKit - WebKit Page Loading Note that only 4th generation models are affected by the vulnerabilities. last seen 2020-06-01 modified 2020-06-02 plugin id 92494 published 2016-07-21 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/92494 title Apple TV < 9.2.2 Multiple Vulnerabilities NASL family Fedora Local Security Checks NASL id FEDORA_2016-D957FFBAC1.NASL description This update addresses the following vulnerabilities : - [CVE-2016-4622](https://cve.mitre.org/cgi-bin/cvename.cg i?name=CVE-2016-4622), [CVE-2016-4624](https://cve.mitre.org/cgi-bin/cvename.cg i?name=CVE-2016-4624), [CVE-2016-4591](https://cve.mitre.org/cgi-bin/cvename.cg i?name=CVE-2016-4591), [CVE-2016-4590](https://cve.mitre.org/cgi-bin/cvename.cg i?name=CVE-2016-4590) Additional fixes : - Fix performance in accelerated compositing mode with the modesetting intel driver and DRI3 enabled. - Reduce the amount of file descriptors that the Web Process keeps open. - Fix Web Process deadlocks when loading HLS videos. - Make CSS and SVG animations run at 60fps. - Make meter elements accessible. - Improve accessibility name and description of elements to make it more compatible with W3C specs and fix several bugs in which the accessible name of objects was missing or broken. - Fix a crash when running windowed plugins under Wayland. - Fix a crash at process exit under Wayland. - Fix several crashes and rendering issues. Translation updates : - German. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-05 modified 2016-09-02 plugin id 93264 published 2016-09-02 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/93264 title Fedora 23 : webkitgtk4 (2016-d957ffbac1) NASL family Fedora Local Security Checks NASL id FEDORA_2016-4728DFE3EC.NASL description This update addresses the following vulnerabilities : - [CVE-2016-4622](https://cve.mitre.org/cgi-bin/cvename.cg i?name=CVE-2016-4622), [CVE-2016-4624](https://cve.mitre.org/cgi-bin/cvename.cg i?name=CVE-2016-4624), [CVE-2016-4591](https://cve.mitre.org/cgi-bin/cvename.cg i?name=CVE-2016-4591), [CVE-2016-4590](https://cve.mitre.org/cgi-bin/cvename.cg i?name=CVE-2016-4590) Additional fixes : - Fix performance in accelerated compositing mode with the modesetting intel driver and DRI3 enabled. - Reduce the amount of file descriptors that the Web Process keeps open. - Fix Web Process deadlocks when loading HLS videos. - Make CSS and SVG animations run at 60fps. - Make meter elements accessible. - Improve accessibility name and description of elements to make it more compatible with W3C specs and fix several bugs in which the accessible name of objects was missing or broken. - Fix a crash when running windowed plugins under Wayland. - Fix a crash at process exit under Wayland. - Fix several crashes and rendering issues. Translation updates : - German. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-05 modified 2016-08-29 plugin id 93139 published 2016-08-29 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/93139 title Fedora 24 : webkitgtk4 (2016-4728dfe3ec) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3079-1.NASL description A large number of security issues were discovered in the WebKitGTK+ Web and JavaScript engines. If a user were tricked into viewing a malicious website, a remote attacker could exploit a variety of issues related to web browser security, including cross-site scripting attacks, denial of service attacks, and arbitrary code execution. Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 93511 published 2016-09-15 reporter Ubuntu Security Notice (C) 2016-2019 Canonical, Inc. / NASL script (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/93511 title Ubuntu 16.04 LTS : webkit2gtk vulnerabilities (USN-3079-1) NASL family MacOS X Local Security Checks NASL id MACOSX_SAFARI9_1_2.NASL description The version of Apple Safari installed on the remote Mac OS X host is prior to 9.1.2. It is, therefore, affected by multiple vulnerabilities, the most serious of which can result in remote code execution, in the following components : - WebKit - WebKit JavaScript Bindings - WebKit Page Loading last seen 2020-06-01 modified 2020-06-02 plugin id 92358 published 2016-07-19 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/92358 title Mac OS X : Apple Safari < 9.1.2 Multiple Vulnerabilities
References
- http://lists.apple.com/archives/security-announce/2016/Jul/msg00001.html
- http://lists.apple.com/archives/security-announce/2016/Jul/msg00003.html
- http://lists.apple.com/archives/security-announce/2016/Jul/msg00004.html
- http://packetstormsecurity.com/files/138502/WebKitGTK-SOP-Bypass-Information-Disclosure.html
- http://www.securityfocus.com/archive/1/539295/100/0/threaded
- http://www.securityfocus.com/bid/91830
- http://www.securitytracker.com/id/1036343
- http://www.zerodayinitiative.com/advisories/ZDI-16-485
- http://www.zerodayinitiative.com/advisories/ZDI-16-486
- https://support.apple.com/HT206900
- https://support.apple.com/HT206902
- https://support.apple.com/HT206905