Apple iOS/iPadOS/tvOS/watchOS CVE-2019-8836 Memory Corruption Vulnerability

Risk

High

Date Discovered

December 10, 2019

Description

Apple iOS, iPadOS, tvOS and watchOS are prone to a memory corruption vulnerability. An attacker can leverage this issue to execute arbitrary code with kernel privileges. Failed exploit attempts will likely result in denial-of-service conditions. This issue is fixed in: Apple iOS 13.3 Apple iPadOS 13.3 Apple watchOS 6.1.1 Apple tvOS 13.3

Technologies Affected

  • Apple TV
  • 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 12.0.1
  • 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 13.1
  • 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 6.0.1
  • 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
  • Apple iPad Air
  • Apple iPadOS 13.1
  • Apple iPadOS 13.2
  • Apple iPadOS
  • Apple iPhone 6s
  • Apple iPhone
  • Apple iPhone X
  • Apple iPod Touch
  • Apple tvOS 10
  • Apple tvOS 10.0.1
  • Apple tvOS 10.1
  • Apple tvOS 10.1.1
  • Apple tvOS 10.2
  • Apple tvOS 10.2.1
  • Apple tvOS 10.2.2
  • Apple tvOS 11
  • Apple tvOS 11.1
  • Apple tvOS 11.2
  • Apple tvOS 11.2.1
  • Apple tvOS 11.2.5
  • Apple tvOS 11.2.6
  • Apple tvOS 11.4
  • Apple tvOS 11.4.1
  • Apple tvOS 12.1.1
  • Apple tvOS 12.1.2
  • Apple tvOS 12.2.1
  • Apple tvOS 12.3
  • Apple tvOS 12.4
  • Apple tvOS 12.4.1
  • Apple tvOS 13.2
  • Apple tvOS 9.0
  • Apple tvOS 9.1
  • Apple tvOS 9.1.1
  • Apple tvOS 9.2
  • Apple tvOS 9.2.1
  • Apple tvOS 9.2.2
  • Apple watchOS 1.0
  • Apple watchOS 1.0.1
  • Apple watchOS 10.1.1
  • 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 5.1.2
  • Apple watchOS 5.1.3
  • Apple watchOS 5.2.1
  • Apple watchOS 5.3
  • Apple watchOS 6.1

Recommendations

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.

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.

References

Credits

Xiaolong Bai and Min (Spark) Zheng of Alibaba Inc. and Luyi Xing of Indiana University Bloomington.


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