CVE-2021-30887: Medium severity Apple tvOS vulnerability

Published Aug 24, 2021
·
Updated

A flaw was found in WebKitGTK. A logic issue was addressed with improved restrictions.

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

Other sources

A logic issue was addressed with improved restrictions. This issue is fixed in macOS Monterey 12.0.1, iOS 15.1 and iPadOS 15.1, watchOS 8.1, tvOS 15.1. Processing maliciously crafted web content may lead to unexpectedly unenforced Content Security Policy.

WebKit. A logic issue was addressed with improved restrictions.

Credit

Narendra Bhati@@imnarendrabhati(Suma Soft Pvt)

Affected Software

23 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<15.1
15.1
Apple WatchOS<8.1
8.1
Apple macOS Monterey<12.0.1
12.0.1
Apple Safari<15.1
15.1
Apple iOS<15.1
15.1
Apple iPadOS<15.1
15.1
Apple iPadOS<15.1
Apple iPhone OS<15.1
Apple macOS<12.0.1
Apple tvOS<15.1
Apple WatchOS<8.1
Fedoraproject Fedora=34
Fedoraproject Fedora=35
Debian Debian Linux=10.0
Debian Debian Linux=11.0
redhat/webkitgtk<2.34.3
2.34.3
alpine/webkit2gtk<2.34.3-r0
2.34.3-r0
alpine/webkit2gtk<2.34.3-r0
2.34.3-r0
alpine/webkit2gtk<2.34.3-r0
2.34.3-r0
alpine/webkit2gtk<2.34.3-r0
2.34.3-r0
alpine/webkit2gtk<2.34.3-r0
2.34.3-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 15.1
  4. Upgrade

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

    Fixed in 8.1
  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 15.1
  7. Upgrade

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

    Fixed in 15.1
  8. Upgrade

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

    Fixed in 15.1
  9. Upgrade

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

    Fixed in 2.34.3
  10. Upgrade

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

    Fixed in 2.34.3-r0
  11. Upgrade

    Upgrade WebKit on macOS Monterey to a version that resolves this vulnerability.

    Fixed in 12.0.1
  12. Upgrade

    Upgrade WebKit on iOS to a version that resolves this vulnerability.

    Fixed in 15.1
  13. Upgrade

    Upgrade WebKit on iPadOS to a version that resolves this vulnerability.

    Fixed in 15.1
  14. Upgrade

    Upgrade WebKit on watchOS to a version that resolves this vulnerability.

    Fixed in 8.1
  15. Upgrade

    Upgrade WebKit on tvOS to a version that resolves this vulnerability.

    Fixed in 15.1

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
DescriptionSeverityAffected Software
Dec 20, 2021
Data Sourced
via Red Hat·07:17 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-2021-30887?

CVE-2021-30887 is a logic issue in WebKit that has been addressed with improved restrictions.

2

Which software is affected by CVE-2021-30887?

CVE-2021-30887 affects Apple Safari 15.1, Apple macOS Monterey 12.0.1, Apple iOS 15.1, Apple iPadOS 15.1, Apple tvOS 15.1, and Apple watchOS 8.1.

3

How severe is CVE-2021-30887?

The severity of CVE-2021-30887 is not specified in the information provided.

4

How can I fix CVE-2021-30887?

To fix CVE-2021-30887, it is recommended to update your affected software to the specified versions: Apple Safari 15.1, Apple macOS Monterey 12.0.1, Apple iOS 15.1, Apple iPadOS 15.1, Apple tvOS 15.1, and Apple watchOS 8.1.

5

Where can I find more information about CVE-2021-30887?

You can find more information about CVE-2021-30887 on Apple's support page at the following links: [link1](https://support.apple.com/en-us/HT212867), [link2](https://support.apple.com/en-us/HT212874), [link3](https://support.apple.com/en-us/HT212875).

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203