Apple iOS/iPadOS/watchOS/macOS CVE-2019-8856 Security Vulnerability

Description

Apple iOS/iPadOS/watchOS/macOS are prone to a security vulnerability. Attackers can exploit this issue to bypass security restrictions and perform unauthorized actions.

Technologies Affected

• Apple Ipad Mini-
• Apple Watch
• Apple iOS 10
• Apple iOS 10.0.1
• Apple iOS 10.1
• Apple iOS 10.2
• Apple iOS 10.2.1
• Apple iOS 10.3
• Apple iOS 10.3.1
• Apple iOS 10.3.2
• Apple iOS 10.3.3
• Apple iOS 11
• Apple iOS 11.1
• Apple iOS 11.2
• Apple iOS 11.2.1
• Apple iOS 11.2.2
• Apple iOS 11.2.5
• Apple iOS 11.2.6
• Apple iOS 11.3
• Apple iOS 11.3.1
• Apple iOS 11.4
• Apple iOS 11.4.1
• Apple iOS 12
• Apple iOS 12.0.1
• Apple iOS 12.1
• Apple iOS 12.1.1
• Apple iOS 12.1.3
• Apple iOS 12.1.4
• Apple iOS 12.2
• Apple iOS 12.3
• Apple iOS 12.4
• Apple iOS 12.4.1
• Apple iOS 13
• Apple iOS 13.1
• Apple iOS 13.2
• Apple iOS 2.0
• Apple iOS 2.1
• Apple iOS 3
• Apple iOS 3.0
• Apple iOS 3.1
• Apple iOS 3.2
• Apple iOS 3.2.1
• Apple iOS 3.2.2
• Apple iOS 4
• Apple iOS 4
• Apple iOS 4.0.1
• Apple iOS 4.0.2
• Apple iOS 4.1
• Apple iOS 4.2
• Apple iOS 4.2.1
• Apple iOS 4.2.10
• Apple iOS 4.2.5
• Apple iOS 4.2.6
• Apple iOS 4.2.7
• Apple iOS 4.2.8
• Apple iOS 4.2.9
• Apple iOS 4.3
• Apple iOS 4.3.1
• Apple iOS 4.3.2
• Apple iOS 4.3.3
• Apple iOS 4.3.4
• Apple iOS 4.3.5
• Apple iOS 5
• Apple iOS 5
• Apple iOS 5.0.1
• Apple iOS 5.1
• Apple iOS 5.1.1
• Apple iOS 6
• Apple iOS 6 Beta 4
• Apple iOS 6.0.1
• Apple iOS 6.0.2
• Apple iOS 6.1
• Apple iOS 6.1.3
• Apple iOS 6.1.4
• Apple iOS 6.1.6
• Apple iOS 6.3.1
• Apple iOS 7
• Apple iOS 7.0.1
• Apple iOS 7.0.2
• Apple iOS 7.0.3
• Apple iOS 7.0.4
• Apple iOS 7.0.5
• Apple iOS 7.0.6
• Apple iOS 7.1
• Apple iOS 7.1.1
• Apple iOS 7.1.2
• Apple iOS 7.2.0
• Apple iOS 8
• Apple iOS 8.1
• Apple iOS 8.1.1
• Apple iOS 8.1.2
• Apple iOS 8.1.3
• Apple iOS 8.2
• Apple iOS 8.3
• Apple iOS 8.4
• Apple iOS 8.4.1
• Apple iOS 9
• Apple iOS 9.0.1
• Apple iOS 9.0.2
• Apple iOS 9.1
• Apple iOS 9.2
• Apple iOS 9.2.1
• Apple iOS 9.3
• Apple iOS 9.3.1
• Apple iOS 9.3.2
• Apple iOS 9.3.3
• Apple iOS 9.3.4
• Apple iOS 9.3.5
• Apple iPad Air
• Apple iPadOS 13.1
• Apple iPadOS 13.2
• Apple iPhone
• Apple iPod Touch
• Apple macOS 10.15
• Apple watchOS 1.0
• Apple watchOS 1.0.1
• Apple watchOS 10.1.1
• Apple watchOS 12.4
• Apple watchOS 2.0
• Apple watchOS 2.0.1
• Apple watchOS 2.1
• Apple watchOS 2.2
• Apple watchOS 2.2.1
• Apple watchOS 2.2.2
• Apple watchOS 3
• Apple watchOS 3.0
• Apple watchOS 3.1
• Apple watchOS 3.1.1
• Apple watchOS 3.1.3
• Apple watchOS 3.2
• Apple watchOS 3.2.1
• Apple watchOS 3.2.2
• Apple watchOS 3.2.3
• Apple watchOS 4
• Apple watchOS 4.1
• Apple watchOS 4.2
• Apple watchOS 4.2.2
• Apple watchOS 4.2.3
• Apple watchOS 4.3
• Apple watchOS 4.3.1
• Apple watchOS 4.3.2
• Apple watchOS 5
• Apple watchOS 5.1.2
• Apple watchOS 5.1.3
• Apple watchOS 5.2.1
• Apple watchOS 5.3
• Apple watchOS 5.3.4
• Apple watchOS 6.1

Recommendations

Block external access at the network boundary, unless external parties require service.
If global access isn’t needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of successful exploits.

Run all software as a nonprivileged user with minimal access rights.
To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This includes but is not limited to requests that include NOP sleds and unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.

Do not accept or execute files from untrusted or unknown sources.
To reduce the likelihood of successful exploits, never handle files that originate from unfamiliar or untrusted sources.

Do not follow links provided by unknown or untrusted sources.
Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources. Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.

Implement multiple redundant layers of security.
Since this issue may be leveraged to execute code, we recommend memory-protection schemes, such as nonexecutable stack/heap configurations and randomly mapped memory segments. This tactic may complicate exploits of memory-corruption vulnerabilities.

Updates are available. Please see the references or vendor advisory for more information.