CVE-2021-30858: Apple iOS, iPadOS, macOS Use-After-Free Vulnerability
First published: Tue Aug 24 2021(Updated: )
A use after free issue was addressed with improved memory management. This issue is fixed in iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.
Credit: an anonymous researcher cve@mitre.org product-security@apple.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/webkit2gtk | 2.36.4-1~deb10u1 2.38.6-0+deb10u1 2.40.5-1~deb11u1 2.42.1-1~deb11u2 2.40.5-1~deb12u1 2.42.1-1~deb12u1 2.42.1-2 | |
| debian/wpewebkit | 2.38.6-1~deb11u1 2.38.6-1 2.42.1-1 | |
| Apple iOS, iPadOS, and macOS | ||
| Apple macOS | <11.6 | 11.6 |
| Apple Mobile Safari | <14.1.2 | 14.1.2 |
| Apple iOS, iPadOS, and watchOS | >=13.1<14.8 | |
| iOS | <12.5.5 | |
| iOS | >=13.0<14.8 | |
| Apple iOS and macOS | <11.6 | |
| Fedoraproject Fedora | =33 | |
| Fedoraproject Fedora | =34 | |
| Debian GNU/Linux | =10.0 | |
| Debian GNU/Linux | =11.0 | |
| Apple iOS, iPadOS, and watchOS | <12.5.5 | 12.5.5 |
| Apple iOS, iPadOS, and watchOS | <14.8 | 14.8 |
| Apple iOS, iPadOS, and watchOS | <14.8 | 14.8 |
| Debian | =10.0 | |
| Debian | =11.0 |
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Reference Links
- https://support.apple.com/en-us/HT212808 (Advisory)
- https://webkitgtk.org/security/WSA-2021-0005.html
- https://security-tracker.debian.org/tracker/CVE-2021-30858
- https://support.apple.com/en-us/HT212804 (Advisory)
- https://support.apple.com/en-us/HT212824 (Advisory)
- https://support.apple.com/en-us/HT212807 (Advisory)
- http://seclists.org/fulldisclosure/2021/Sep/25
- http://seclists.org/fulldisclosure/2021/Sep/27
- http://seclists.org/fulldisclosure/2021/Sep/29
- http://seclists.org/fulldisclosure/2021/Sep/38
- http://seclists.org/fulldisclosure/2021/Sep/39
- http://seclists.org/fulldisclosure/2021/Sep/50
- http://www.openwall.com/lists/oss-security/2021/09/20/1
- http://www.openwall.com/lists/oss-security/2021/10/26/9
- http://www.openwall.com/lists/oss-security/2021/10/27/1
- http://www.openwall.com/lists/oss-security/2021/10/27/2
- http://www.openwall.com/lists/oss-security/2021/10/27/4
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BO6DMTHZR57JDBOXPSNR2MKDMCRWV265/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XYNV7ASK4LQVAUMJXNXBS3Z7RVDQ2N3W/
- https://support.apple.com/kb/HT212824
- https://www.debian.org/security/2021/dsa-4975
- https://www.debian.org/security/2021/dsa-4976
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BO6DMTHZR57JDBOXPSNR2MKDMCRWV265/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XYNV7ASK4LQVAUMJXNXBS3Z7RVDQ2N3W/
- https://nvd.nist.gov/vuln/detail/CVE-2021-30858
Peer vulnerabilities
(Found alongside the following vulnerabilities)
- CVE-2021-30811
- CVE-2021-30838
- CVE-2021-30834
- CVE-2021-30928
- CVE-2021-30860
- CVE-2021-31010
- CVE-2021-30827
- CVE-2021-30828
- CVE-2021-30829
- CVE-2021-22925
- CVE-2021-30832
- CVE-2021-30841
- CVE-2021-30842
- CVE-2021-30843
- CVE-2021-30853
- CVE-2021-30933
- CVE-2021-30835
- CVE-2021-30847
- CVE-2021-30830
- CVE-2021-30865
- CVE-2021-30857
- CVE-2021-30859
- CVE-2021-30864
- CVE-2013-0340
- CVE-2021-30813
- CVE-2021-30819
- CVE-2021-30855
- CVE-2021-30925
- CVE-2021-30850
- CVE-2021-30845
- CVE-2021-30844
- CVE-2021-30858
- CVE-2021-30869
- CVE-2021-30820
- CVE-2021-30905
- CVE-2021-30852
- CVE-2021-30826
- CVE-2021-30818
- CVE-2021-30823
- CVE-2021-30836
- CVE-2021-30848
- CVE-2021-30849
- CVE-2021-30846
Frequently Asked Questions
What is the vulnerability ID for this Apple iOS, iPadOS, and macOS vulnerability?
The vulnerability ID is CVE-2021-30858.
What is the severity of CVE-2021-30858?
The severity of CVE-2021-30858 is not specified.
Which software products are affected by CVE-2021-30858?
Apple iOS, Safari, macOS Big Sur, iOS, iPadOS, and macOS are affected by CVE-2021-30858.
How can an attacker exploit CVE-2021-30858?
An attacker can exploit CVE-2021-30858 by tricking a user into visiting a malicious website or opening a specially crafted file.
Is there a fix available for CVE-2021-30858?
Yes, Apple has released updates to address the vulnerability. Please refer to the official support links for more information.
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