CVE-2021-30858

Apple iOS, iPadOS, macOS Use-After-Free Vulnerability

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

Yes

*KEV

Decision

*SSVC

Descriptions

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.

Se ha solucionado un problema de uso después de la liberación con una mejor gestión de la memoria. Este problema se ha solucionado en iOS 14.8 y iPadOS 14.8, macOS Big Sur 11.6. El procesamiento de contenido web malicioso puede conducir a la ejecución de código arbitrario. Apple tiene conocimiento de un informe que indica que este problema puede haber sido explotado activamente.

A flaw was found in webkitgtk. This flaw could allow an attacker to use maliciously crafted web content leading to arbitrary code execution.

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 for HTML processing.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-04-13 CVE Reserved
2021-08-24 CVE Published
2021-11-03 Exploited in Wild
2021-11-17 KEV Due Date
2024-07-30 EPSS Updated
2024-08-03 CVE Updated
---------- First Exploit

CWE

CWE-416: Use After Free

CAPEC

References (20)

URL	Tag	Source
http://seclists.org/fulldisclosure/2021/Sep/25	Mailing List
http://seclists.org/fulldisclosure/2021/Sep/27	Mailing List
http://seclists.org/fulldisclosure/2021/Sep/29	Mailing List
http://seclists.org/fulldisclosure/2021/Sep/38	Mailing List
http://seclists.org/fulldisclosure/2021/Sep/39	Mailing List
http://seclists.org/fulldisclosure/2021/Sep/50	Mailing List
http://www.openwall.com/lists/oss-security/2021/09/20/1	Mailing List
http://www.openwall.com/lists/oss-security/2021/10/26/9	Mailing List
http://www.openwall.com/lists/oss-security/2021/10/27/1	Mailing List
http://www.openwall.com/lists/oss-security/2021/10/27/2	Mailing List
http://www.openwall.com/lists/oss-security/2021/10/27/4	Mailing List
https://support.apple.com/en-us/HT212804	X_refsource_misc
https://support.apple.com/en-us/HT212807	X_refsource_misc
https://support.apple.com/kb/HT212824	X_refsource_confirm

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BO6DMTHZR57JDBOXPSNR2MKDMCRWV265	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XYNV7ASK4LQVAUMJXNXBS3Z7RVDQ2N3W	2023-11-07
https://www.debian.org/security/2021/dsa-4975	2023-11-07
https://www.debian.org/security/2021/dsa-4976	2023-11-07
https://access.redhat.com/security/cve/CVE-2021-30858	2022-01-11
https://bugzilla.redhat.com/show_bug.cgi?id=2006099	2022-01-11

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Apple Search vendor "Apple"		Ipados Search vendor "Apple" for product "Ipados"				>= 13.1 < 14.8 Search vendor "Apple" for product "Ipados" and version " >= 13.1 < 14.8"		-		Affected
Apple Search vendor "Apple"		Iphone Os Search vendor "Apple" for product "Iphone Os"				< 12.5.5 Search vendor "Apple" for product "Iphone Os" and version " < 12.5.5"		-		Affected
Apple Search vendor "Apple"		Iphone Os Search vendor "Apple" for product "Iphone Os"				>= 13.0 < 14.8 Search vendor "Apple" for product "Iphone Os" and version " >= 13.0 < 14.8"		-		Affected
Apple Search vendor "Apple"		Macos Search vendor "Apple" for product "Macos"				< 11.6 Search vendor "Apple" for product "Macos" and version " < 11.6"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				33 Search vendor "Fedoraproject" for product "Fedora" and version "33"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				34 Search vendor "Fedoraproject" for product "Fedora" and version "34"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0"		-		Affected