CVE-2019-8681: Use After Free

Q: What is CVE-2019-8681?

CVE-2019-8681 is a vulnerability in WebKit that allows processing malicious web content to lead to arbitrary code execution.

Q: What products are affected by CVE-2019-8681?

CVE-2019-8681 affects iOS, macOS, tvOS, Safari, iTunes for Windows, and iCloud for Windows.

Q: What is the severity of CVE-2019-8681?

CVE-2019-8681 has a severity rating of 8.8 (High).

Q: How do I fix CVE-2019-8681 on iOS?

To fix CVE-2019-8681 on iOS, update to version 12.4 or later.

Q: How do I fix CVE-2019-8681 on macOS?

To fix CVE-2019-8681 on macOS, update to version 10.14.6 or later.

Published Jul 22, 2019

Updated

Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in iOS 12.4, macOS Mojave 10.14.6, tvOS 12.4, Safari 12.1.2, iTunes for Windows 12.9.6, iCloud for Windows 7.13, iCloud for Windows 10.6. Processing maliciously crafted web content may lead to arbitrary code execution.

Other sources

WebKit. Multiple memory corruption issues were addressed with improved memory handling.

WebKitGTK Security Advisory WSA-2019-0004 describes the following issue:

CVE-2019-8681

Processing maliciously crafted web content may lead to arbitrary code execution. Multiple memory corruption issues were addressed with improved memory handling.

Versions affected: WebKitGTK and WPE WebKit before 2.24.3.

— Red Hat

Credit

G. Geshev(Trend Micro), Zongming Wang (王宗明), Zhe Jin (金哲)(Chengdu Security Response Center of Qihoo 360 Technology Co), akayn(Trend Micro), Apple, Samuel Groß(Google Project Zero), Soyeon Park, Wen Xu(SSLab at Georgia Tech), Jihui Lu(Tencent KeenLab), Anthony Lai@@darkfloyd1014(Knownsec), Ken Wong@@wwkenwong(VXRL), Jeonghoon Shin@@singi21a(Theori), Johnny Yu@@straight_blast(VX Browser Exploitation Group), Chris Chan@@dr4g0nfl4me(VX Browser Exploitation Group), Phil Mok@@shadyhamsters(VX Browser Exploitation Group), Alan Ho@@alan_h0(Knownsec), Byron Wai(VX Browser Exploitation), P1umer(ADLab of Venustech), G. Geshev(Trend Micro Zero Day Initiative), lokihardt(Google Project Zero), akayn, Dongzhuo Zhao(ADLab of Venustech), Anthony Lai@@darkfloyd1014(VXRL), Eric Lung@@Khlung1(VXRL), Insu Yun(SSLab at Georgia Tech), an anonymous researcher

Affected Software

16 affected componentsFixes available

redhat/webkitgtk<2.24.3

2.24.3

Apple tvOS<12.4

12.4

Apple macOS Mojave<10.14.6

10.14.6

Apple High Sierra

Apple Sierra

Apple iCloud for Windows<7.13

7.13

Apple iCloud for Windows<10.6

10.6

Apple iTunes for Windows<12.9.6

12.9.6

Apple iOS<12.4

12.4

Apple Icloud Windows<7.13

Apple Icloud Windows>=10.0<10.6

Apple Itunes Windows<12.9.6

Apple Safari<12.1.2

Apple iPhone OS<12.4

Apple iOS and macOS<10.14.6

Apple tvOS<12.4

Event History

Dec 18, 2019

CVE Published

via MITRE·05:33 PM

Data Sourced

via MITRE·05:33 PM

DescriptionWeakness

Parent advisories

This vulnerability appears in the following advisories.

Frequently Asked Questions

What is CVE-2019-8681?

CVE-2019-8681 is a vulnerability in WebKit that allows processing malicious web content to lead to arbitrary code execution.

What products are affected by CVE-2019-8681?

CVE-2019-8681 affects iOS, macOS, tvOS, Safari, iTunes for Windows, and iCloud for Windows.

What is the severity of CVE-2019-8681?

CVE-2019-8681 has a severity rating of 8.8 (High).

How do I fix CVE-2019-8681 on iOS?