Vulnerability Details : CVE-2021-30858
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.
Vulnerability category: Memory Corruption
Products affected by CVE-2021-30858
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
- cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
- cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
- cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
- cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
CVE-2021-30858 is in the CISA Known Exploited Vulnerabilities Catalog
CISA vulnerability name:
Apple iOS, iPadOS, macOS Use-After-Free Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
Apple iOS, iPadOS, and macOS WebKit contain a use-after-free vulnerability that leads to code execution when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit
Notes:
https://nvd.nist.gov/vuln/detail/CVE-2021-30858
Added on
2021-11-03
Action due date
2021-11-17
Exploit prediction scoring system (EPSS) score for CVE-2021-30858
0.54%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 77 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-30858
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
6.4
|
NIST | |
|
8.8
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST |
CWE ids for CVE-2021-30858
-
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-30858
-
http://www.openwall.com/lists/oss-security/2021/10/27/2
oss-security - Re: WebKitGTK and WPE WebKit Security Advisory WSA-2021-0006Mailing List
-
https://support.apple.com/en-us/HT212804
About the security content of macOS Big Sur 11.6 - Apple SupportThird Party Advisory
-
http://seclists.org/fulldisclosure/2021/Sep/50
Full Disclosure: APPLE-SA-2021-09-23-1 iOS 12.5.5Mailing List;Third Party Advisory
-
https://support.apple.com/kb/HT212824
About the security content of iOS 12.5.5 - Apple SupportThird Party Advisory
-
https://support.apple.com/en-us/HT212807
About the security content of iOS 14.8 and iPadOS 14.8 - Apple SupportThird Party Advisory
-
http://www.openwall.com/lists/oss-security/2021/10/27/4
oss-security - Re: WebKitGTK and WPE WebKit Security Advisory WSA-2021-0006Mailing List
-
http://seclists.org/fulldisclosure/2021/Sep/25
Full Disclosure: APPLE-SA-2021-09-13-1 iOS 14.8 and iPadOS 14.8Mailing List;Third Party Advisory
-
http://www.openwall.com/lists/oss-security/2021/10/27/1
oss-security - Re: WebKitGTK and WPE WebKit Security Advisory WSA-2021-0006Mailing List
-
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XYNV7ASK4LQVAUMJXNXBS3Z7RVDQ2N3W/
[SECURITY] Fedora 33 Update: webkit2gtk3-2.32.4-1.fc33 - package-announce - Fedora mailing-listsRelease Notes
-
http://seclists.org/fulldisclosure/2021/Sep/38
Full Disclosure: APPLE-SA-2021-09-20-6 Additional information for APPLE-SA-2021-09-13-1 iOS 14.8 and iPadOS 14.8Mailing List;Third Party Advisory
-
https://www.debian.org/security/2021/dsa-4976
Debian -- Security Information -- DSA-4976-1 wpewebkitMailing List;Third Party Advisory
-
https://www.debian.org/security/2021/dsa-4975
Debian -- Security Information -- DSA-4975-1 webkit2gtkMailing List;Third Party Advisory
-
http://seclists.org/fulldisclosure/2021/Sep/27
Full Disclosure: APPLE-SA-2021-09-13-3 macOS Big Sur 11.6Mailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XYNV7ASK4LQVAUMJXNXBS3Z7RVDQ2N3W/
[SECURITY] Fedora 33 Update: webkit2gtk3-2.32.4-1.fc33 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BO6DMTHZR57JDBOXPSNR2MKDMCRWV265/
[SECURITY] Fedora 34 Update: webkit2gtk3-2.32.4-1.fc34 - package-announce - Fedora mailing-listsRelease Notes
-
http://www.openwall.com/lists/oss-security/2021/09/20/1
oss-security - WebKitGTK and WPE WebKit Security Advisory WSA-2021-0005Mailing List
-
http://seclists.org/fulldisclosure/2021/Sep/29
Full Disclosure: APPLE-SA-2021-09-13-5 Safari 14.1.2Mailing List;Third Party Advisory
-
http://www.openwall.com/lists/oss-security/2021/10/26/9
oss-security - WebKitGTK and WPE WebKit Security Advisory WSA-2021-0006Mailing List
-
http://seclists.org/fulldisclosure/2021/Sep/39
Full Disclosure: APPLE-SA-2021-09-20-7 Additional information for APPLE-SA-2021-09-13-3 macOS Big Sur 11.6Mailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BO6DMTHZR57JDBOXPSNR2MKDMCRWV265/
[SECURITY] Fedora 34 Update: webkit2gtk3-2.32.4-1.fc34 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
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