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High severity · published Sep 8, 2021
CVE-2021-30661
Apple Multiple Products WebKit Storage Use-After-Free Vulnerability
In wildKEV
8.8
CVSS
4.5%
EPSS
Yes
On KEV
Description
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..
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.5% · higher than 91% of CVEs
Exploited in the wildYes
CISA KEVListed Nov 3, 2021
Federal remediation dueNov 17, 2021
Ransomware campaign useNot known
Affected products
Which versions
MA
macOS · Apple
before 11.3; before 12.5 · source: vendor, NVD
IO
iOS · Apple
before 14.5 · source: NVD
SA
Safari · Apple
before 14.1 · source: vendor, NVD
IA
iOS and iPadOS · Apple
before 14.5 · source: vendor
TV
tvOS · Apple
before 14.5 · source: vendor, NVD
WA
watchOS · Apple
before 7.4 · source: vendor, NVD
MP
Multiple Products · Apple
All versions, or not specified · source: KEV
Affected product
MA
macOS
Apple
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-30661
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-30661
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
x_refsource_MISC
https://support.apple.com/en-us/HT212317
x_refsource_MISC
https://support.apple.com/en-us/HT212323
x_refsource_MISC
https://support.apple.com/en-us/HT212324
x_refsource_MISC
https://support.apple.com/en-us/HT212325
x_refsource_MISC
https://support.apple.com/en-us/HT212341
x_refsource_MISC
https://support.apple.com/en-us/HT212318
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