CVE-2021-30661

Apple Multiple Products WebKit Storage 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

Act

*SSVC

Descriptions

A use after free issue was addressed with improved memory management. This issue is fixed in Safari 14.1, iOS 12.5.3, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3. 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 abordó un problema de uso de la memoria previamente liberada con una administración de la memoria mejorada. Este problema es corregido en Safari versión 14.1, iOS versión 12.5.3, iOS versión 14.5 y iPadOS versión 14.5, watchOS versión 7.4, tvOS versión 14.5, macOS Big Sur versión 11.3. El procesamiento de contenido web maliciosamente diseñado puede conllevar a una ejecución de código arbitrario. Apple está al tanto de un informe de que este problema puede haber sido explotado activamente

A flaw was found in the webkitgtk package. Affected versions of this package could allow a remote attacker to execute arbitrary code on the system caused by a use-after-free in the WebKit component. An attacker can execute arbitrary code on the system by persuading a victim to visit a specially crafted Web site.

macOS Big Sur 11.3 addresses buffer overflow, bypass, code execution, cross site scripting, denial of service, double free, heap corruption, integer overflow, out of bounds read, out of bounds write, and use-after-free vulnerabilities.

Apple iOS, iPadOS, macOS, tvOS, watchOS, and Safari WebKit Storage 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

CVSS Scores

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

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:Act

Exploitation

Active

Automatable

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2021-04-13 CVE Reserved
2021-04-28 CVE Published
2021-11-03 Exploited in Wild
2021-11-17 KEV Due Date
2025-01-29 CVE Updated
2025-04-12 EPSS Updated
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-416: Use After Free

CAPEC

References (8)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://support.apple.com/en-us/HT212317	2024-05-16
https://support.apple.com/en-us/HT212318	2024-05-16
https://support.apple.com/en-us/HT212323	2024-05-16
https://support.apple.com/en-us/HT212324	2024-05-16
https://support.apple.com/en-us/HT212325	2024-05-16
https://support.apple.com/en-us/HT212341	2024-05-16
https://access.redhat.com/security/cve/CVE-2021-30661	2021-05-18
https://bugzilla.redhat.com/show_bug.cgi?id=1986870	2021-05-18

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Apple Search vendor "Apple"		Safari Search vendor "Apple" for product "Safari"				< 14.1 Search vendor "Apple" for product "Safari" and version " < 14.1"		-		Affected
Apple Search vendor "Apple"		Ipados Search vendor "Apple" for product "Ipados"				< 14.5 Search vendor "Apple" for product "Ipados" and version " < 14.5"		-		Affected
Apple Search vendor "Apple"		Iphone Os Search vendor "Apple" for product "Iphone Os"				< 12.5.3 Search vendor "Apple" for product "Iphone Os" and version " < 12.5.3"		-		Affected
Apple Search vendor "Apple"		Iphone Os Search vendor "Apple" for product "Iphone Os"				>= 14.0 < 14.5 Search vendor "Apple" for product "Iphone Os" and version " >= 14.0 < 14.5"		-		Affected
Apple Search vendor "Apple"		Macos Search vendor "Apple" for product "Macos"				>= 11.0 < 11.3 Search vendor "Apple" for product "Macos" and version " >= 11.0 < 11.3"		-		Affected
Apple Search vendor "Apple"		Tvos Search vendor "Apple" for product "Tvos"				< 14.5 Search vendor "Apple" for product "Tvos" and version " < 14.5"		-		Affected
Apple Search vendor "Apple"		Watchos Search vendor "Apple" for product "Watchos"				< 7.4 Search vendor "Apple" for product "Watchos" and version " < 7.4"		-		Affected