CVE-2019-8846: Use After Free

Published Dec 10, 2019
·
Updated

A flaw was found in WebKitGTK before 2.26.3. Processing maliciously crafted web content may lead to arbitrary code execution.

References:

https://www.openwall.com/lists/oss-security/2020/01/23/2 https://webkitgtk.org/security/WSA-2020-0001.html

Other sources

A use after free issue was addressed with improved memory management. This issue is fixed in tvOS 13.3, iCloud for Windows 10.9, iOS 13.3 and iPadOS 13.3, Safari 13.0.4, iTunes 12.10.3 for Windows, iCloud for Windows 7.16. Processing maliciously crafted web content may lead to arbitrary code execution.

— MITRE

WebKit. A use after free issue was addressed with improved memory management.

Credit

Marcin Towalski(Cisco Talos)

Affected Software

28 affected componentsFixes available
redhat/webkitgtk<2.26.3
2.26.3
Apple tvOS<13.3
13.3
Apple iCloud for Windows<10.9
10.9
Apple iCloud for Windows<7.16
7.16
Apple iTunes for Windows<12.10.3
12.10.3
Apple Safari<13.0.4
13.0.4
Apple iOS<13.3
13.3
Apple iPadOS<13.3
13.3
Apple Icloud Windows<7.16
Apple Icloud Windows>=10.0<10.9
Apple Itunes Windows<12.10.3
Apple Safari<13.0.4
Apple iPadOS<13.3
Apple iPhone OS<13.3
Apple tvOS<13.3
redhat Enterprise Linux Desktop=7.0
redhat Enterprise Linux Server=7.0
redhat Enterprise Linux Workstation=7.0
alpine/webkit2gtk<2.26.3-r0
2.26.3-r0
alpine/webkit2gtk<2.26.3-r0
2.26.3-r0
alpine/webkit2gtk<2.26.3-r0
2.26.3-r0
alpine/webkit2gtk<2.26.3-r0
2.26.3-r0
alpine/webkit2gtk<2.26.3-r0
2.26.3-r0
alpine/webkit2gtk<2.26.3-r0
2.26.3-r0
alpine/webkit2gtk<2.26.3-r0
2.26.3-r0
alpine/webkit2gtk<2.26.3-r0
2.26.3-r0
alpine/webkit2gtk<2.26.3-r0
2.26.3-r0
alpine/webkit2gtk<2.26.3-r0
2.26.3-r0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/webkitgtk to a version that resolves this vulnerability.

    Fixed in 2.26.3
  2. Upgrade

    Upgrade tvOS to a version that resolves this vulnerability.

    Fixed in 13.3
  3. Upgrade

    Upgrade Apple iCloud to a version that resolves this vulnerability.

    Fixed in 10.9
  4. Upgrade

    Upgrade Apple iCloud to a version that resolves this vulnerability.

    Fixed in 7.16
  5. Upgrade

    Upgrade iTunes to a version that resolves this vulnerability.

    Fixed in 12.10.3
  6. Upgrade

    Upgrade Safari to a version that resolves this vulnerability.

    Fixed in 13.0.4
  7. Upgrade

    Upgrade Apple iOS and iPadOS to a version that resolves this vulnerability.

    Fixed in 13.3
  8. Upgrade

    Upgrade Apple iOS, iPadOS, and macOS to a version that resolves this vulnerability.

    Fixed in 13.3
  9. Upgrade

    Upgrade alpine/webkit2gtk to a version that resolves this vulnerability.

    Fixed in 2.26.3-r0
  10. Upgrade

    Upgrade WebKitGTK to a version that resolves this vulnerability.

    Fixed in 2.26.3
  11. Upgrade

    Upgrade iCloud for Windows to a version that resolves this vulnerability.

    Fixed in 10.9
  12. Upgrade

    Upgrade iOS to a version that resolves this vulnerability.

    Fixed in 13.3
  13. Upgrade

    Upgrade iPadOS to a version that resolves this vulnerability.

    Fixed in 13.3
  14. Upgrade

    Upgrade iTunes for Windows to a version that resolves this vulnerability.

    Fixed in 12.10.3
  15. Upgrade

    Upgrade iCloud for Windows to a version that resolves this vulnerability.

    Fixed in 7.16

Event History

Oct 27, 2020
CVE Published
via MITRE·08:07 PM
Data Sourced
via MITRE·08:07 PM
DescriptionWeakness
Data Sourced
via NVD·09:15 PM
DescriptionSeverityWeaknessAffected Software
Data Sourced
via OSV·09:15 PM
DescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is CVE-2019-8846?

CVE-2019-8846 is a use after free vulnerability in WebKit that can lead to arbitrary code execution.

2

How does CVE-2019-8846 affect Apple Safari?

CVE-2019-8846 affects Apple Safari version 13.0.4 and earlier, and can be exploited by processing malicious web content.

3

Is there a fix for CVE-2019-8846?

Yes, CVE-2019-8846 is fixed in Safari 13.0.4 and later versions.

4

Which other Apple software is affected by CVE-2019-8846?

CVE-2019-8846 also affects iCloud for Windows versions 10.9 and earlier, iOS 13.3 and earlier, iPadOS 13.3 and earlier, iTunes 12.10.3 for Windows, and iCloud for Windows 7.16 and earlier.

5

What is the severity of CVE-2019-8846?

CVE-2019-8846 has a severity score of 8.8, indicating a critical vulnerability.

Company

Resources

Contact

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