WebKit in Apple iOS before 9.3.3, Safari before 9.1.2, and tvOS before 9.2.2 mishandles the location variable, which allows remote attackers to access the local filesystem via unspecified vectors.

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.

The version of Safari installed on the remote host is prior or equal to 9.1.1, and is affected by multiple vulnerabilities. These vulnerabilities are contained within the Webkit subcomponent.

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.

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.

The version of iOS running on the mobile device is prior to 9.3.3. It is, therefore, affected by multiple vulnerabilities, the most serious of which can result in remote code execution, in the following components :

  - Calendar
  - CoreGraphics
  - FaceTime
  - ImageIO
  - IOAcceleratorFamily
  - IOHIDFamily
  - Kernel
  - libxml2
  - libxslt
  - Safari
  - Sandbox Profiles
  - Siri Contacts
  - Web Media
  - WebKit
  - WebKit JavaScript Bindings
  - WebKit Page Loading

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

ID	Name	Product	Family	Severity
93511	Ubuntu 16.04 LTS : WebKitGTK+ vulnerabilities (USN-3079-1)	Nessus	Ubuntu Local Security Checks	high
9550	Safari < 9.1.2 Multiple Vulnerabilities	Nessus Network Monitor	Web Clients	medium
93264	Fedora 23 : webkitgtk4 (2016-d957ffbac1)	Nessus	Fedora Local Security Checks	high
93139	Fedora 24 : webkitgtk4 (2016-4728dfe3ec)	Nessus	Fedora Local Security Checks	high
92494	Apple TV < 9.2.2 Multiple Vulnerabilities	Nessus	Misc.	critical
92359	Apple iOS < 9.3.3 Multiple Vulnerabilities	Nessus	Mobile Devices	critical
92358	Mac OS X : Apple Safari < 9.1.2 Multiple Vulnerabilities	Nessus	MacOS X Local Security Checks	high

Detections

Analytics

CVE-2016-4591

high

Tenable Plugins

high

medium

high

high

critical

critical

high