CVE-2021-30809: Use After Free

Published Sep 20, 2021
·
Updated

A flaw was found in WebKitGTK. A use after free issue was addressed with improved memory management.

References: https://webkitgtk.org/security/WSA-2021-0007.html https://www.openwall.com/lists/oss-security/2021/12/20/6

Other sources

A use after free issue was addressed with improved memory management. This issue is fixed in Safari 15, tvOS 15, watchOS 8, iOS 15 and iPadOS 15. 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

an anonymous researcher, an anonymous researcher, an anonymous researcher, an anonymous researcher, an anonymous researcher

Affected Software

18 affected componentsFixes available
Apple tvOS<15
15
Apple WatchOS<8
8
Apple macOS Monterey<12.0.1
12.0.1
Apple Safari<15
15
Apple iOS<15
15
Apple iPadOS<15
15
Apple Safari<15.0
Apple iPadOS<15.0
Apple iPhone OS<15.0
Apple macOS<12.0.1
Apple tvOS<15.0
Apple WatchOS<8.0
redhat/webkitgtk<2.32.4
2.32.4
alpine/webkit2gtk<2.32.4-r0
2.32.4-r0
alpine/webkit2gtk<2.32.4-r0
2.32.4-r0
alpine/webkit2gtk<2.32.4-r0
2.32.4-r0
alpine/webkit2gtk<2.32.4-r0
2.32.4-r0
alpine/webkit2gtk<2.32.4-r0
2.32.4-r0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade tvOS to a version that resolves this vulnerability.

    Fixed in 15
  2. Upgrade

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

    Fixed in 8
  3. Upgrade

    Upgrade macOS to a version that resolves this vulnerability.

    Fixed in 12.0.1
  4. Upgrade

    Upgrade Safari to a version that resolves this vulnerability.

    Fixed in 15
  5. Upgrade

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

    Fixed in 15
  6. Upgrade

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

    Fixed in 15
  7. Upgrade

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

    Fixed in 2.32.4
  8. Upgrade

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

    Fixed in 2.32.4-r0
  9. Upgrade

    Upgrade WebKit to a version that resolves this vulnerability.

    Fixed in 15

Event History

Oct 28, 2021
CVE Published
via MITRE·06:17 PM
Data Sourced
via MITRE·06:17 PM
DescriptionWeakness
Data Sourced
via NVD·07:15 PM
DescriptionSeverityWeaknessAffected Software
Data Sourced
via OSV·07:15 PM
DescriptionSeverityAffected Software
Dec 20, 2021
Data Sourced
via Red Hat·06:41 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-2021-30809?

CVE-2021-30809 is a vulnerability in WebKit that allows for a use-after-free attack due to a memory management issue.

2

Which software is affected by CVE-2021-30809?

CVE-2021-30809 affects Apple watchOS (up to version 8), Apple iOS (up to version 15), Apple iPadOS (up to version 15), Apple tvOS (up to version 15), Apple Safari (up to version 15), and Apple macOS Monterey (up to version 12.0.1).

3

How severe is CVE-2021-30809?

The severity of CVE-2021-30809 is not specified in the information provided.

4

How can I fix CVE-2021-30809?

To fix CVE-2021-30809, it is recommended to update the affected software to the latest versions provided by Apple.

5

Where can I find more information about CVE-2021-30809?

You can find more information about CVE-2021-30809 on the official Apple support page: [link](https://support.apple.com/en-us/HT212814).

Company

Resources

Contact

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