CVE-2021-30851: High severity Apple tvOS vulnerability

Published Aug 24, 2021
·
Updated

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

References: https://webkitgtk.org/security/WSA-2021-0006.html https://www.openwall.com/lists/oss-security/2021/10/26/9

Other sources

A memory corruption vulnerability was addressed with improved locking. This issue is fixed in Safari 15, tvOS 15, watchOS 8, iOS 15 and iPadOS 15. Processing maliciously crafted web content may lead to code execution.

WebKit. A memory corruption vulnerability was addressed with improved locking.

Credit

Samuel Groß(Google Project Zero)

Affected Software

26 affected componentsFixes available
debian/webkit2gtk
2.36.4-1~deb10u12.38.6-0+deb10u12.40.5-1~deb11u12.42.1-1~deb11u22.40.5-1~deb12u12.42.1-1~deb12u12.42.1-2
debian/wpewebkit
2.38.6-1~deb11u12.38.6-12.42.1-1
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 macOS=12.0.1
Apple tvOS<15.0
Apple WatchOS<8.0
Debian Debian Linux=10.0
Debian Debian Linux=11.0
Fedoraproject Fedora=33
Fedoraproject Fedora=34
redhat/webkitgtk<2.34.0
2.34.0
alpine/webkit2gtk<2.34.0-r0
2.34.0-r0
alpine/webkit2gtk<2.34.0-r0
2.34.0-r0
alpine/webkit2gtk<2.34.0-r0
2.34.0-r0
alpine/webkit2gtk<2.34.0-r0
2.34.0-r0
alpine/webkit2gtk<2.34.0-r0
2.34.0-r0
alpine/webkit2gtk<2.34.0-r0
2.34.0-r0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 2.36.4-1~deb10u1Fixed in 2.38.6-0+deb10u1Fixed in 2.40.5-1~deb11u1Fixed in 2.42.1-1~deb11u2Fixed in 2.40.5-1~deb12u1Fixed in 2.42.1-1~deb12u1Fixed in 2.42.1-2
  2. Upgrade

    Upgrade debian/wpewebkit to a version that resolves this vulnerability.

    Fixed in 2.38.6-1~deb11u1Fixed in 2.38.6-1Fixed in 2.42.1-1
  3. Upgrade

    Upgrade tvOS to a version that resolves this vulnerability.

    Fixed in 15
  4. Upgrade

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

    Fixed in 8
  5. Upgrade

    Upgrade macOS to a version that resolves this vulnerability.

    Fixed in 12.0.1
  6. Upgrade

    Upgrade Safari to a version that resolves this vulnerability.

    Fixed in 15
  7. Upgrade

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

    Fixed in 15
  8. Upgrade

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

    Fixed in 15
  9. Upgrade

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

    Fixed in 2.34.0
  10. Upgrade

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

    Fixed in 2.34.0-r0
  11. Upgrade

    Upgrade watchOS to a version that resolves this vulnerability.

    Fixed in 8
  12. Upgrade

    Upgrade iOS to a version that resolves this vulnerability.

    Fixed in 15
  13. Upgrade

    Upgrade iPadOS to a version that resolves this vulnerability.

    Fixed in 15

Event History

Aug 24, 2021
CVE Published
via MITRE·06:49 PM
Data Sourced
via MITRE·06:49 PM
DescriptionWeakness
Data Sourced
via NVD·07:15 PM
DescriptionSeverityWeaknessAffected Software
Data Sourced
via OSV·07:15 PM
DescriptionSeverityAffected Software
Oct 29, 2021
Data Sourced
via Red Hat·05:39 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-2021-30851?

CVE-2021-30851 is a memory corruption vulnerability in WebKit that has been addressed with improved locking.

2

Which software versions are affected by CVE-2021-30851?

CVE-2021-30851 affects watchOS up to version 8, iOS up to version 15, iPadOS up to version 15, tvOS up to version 15, Safari up to version 15, and macOS Monterey up to version 12.0.1.

3

How can I fix CVE-2021-30851?

To fix CVE-2021-30851, update your operating system and Safari to the latest available version.

4

Where can I find more information about CVE-2021-30851?

You can find more information about CVE-2021-30851 on Apple's support website at the following links: [HT212814](https://support.apple.com/en-us/HT212814), [HT212819](https://support.apple.com/en-us/HT212819), and [HT212815](https://support.apple.com/en-us/HT212815).

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