High severity · published Aug 24, 2021
CVE-2021-30858
Apple iOS, iPadOS, macOS Use-After-Free Vulnerability
In wildKEV
8.8
CVSS
13.4%
EPSS
Yes
On KEV
Description
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.
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)13.4% · higher than 96% of CVEs
Exploited in the wildYes
CISA KEVListed Nov 3, 2021
Federal remediation dueNov 17, 2021
Ransomware campaign useNot known
Affected products
Which versions
IO
iOS · Apple
before 14.8 · source: vendor, NVD
MA
macOS · Apple
before 11.6 · source: vendor, NVD
DL
Debian Linux · Debian
10.0; 11.0 · source: NVD
FE
Fedora · Fedoraproject
33; 34 · source: NVD
II
iOS, iPadOS, and macOS · Apple
All versions, or not specified · source: KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-30858
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-30858
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
x_refsource_MISC
https://support.apple.com/en-us/HT212804
x_refsource_MISC
https://support.apple.com/en-us/HT212807
mailing-list
http://seclists.org/fulldisclosure/2021/Sep/27
mailing-list
http://seclists.org/fulldisclosure/2021/Sep/25
mailing-list
http://seclists.org/fulldisclosure/2021/Sep/29
mailing-list
http://www.openwall.com/lists/oss-security/2021/09/20/1
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