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AUSCERT Security Bulletin
Apple IOMobileFrameBuffer vulnerability (CVE-2021-30807)
27 July 2021
AusCERT Security Bulletin Summary
Product: macOS Big Sur
Operating System: macOS Big Sur
Impact/Access: Root Compromise -- Unknown/Unspecified
CVE Names: CVE-2021-30807
Apple has released security updates for macOS Big Sur, iOS and iPadOS
to address a vulnerability (CVE-2021-30807) in IOMobileFrameBuffer which
may allow an application to execute arbitrary code with kernel privileges
Apple states they are aware of a report this issue may have been actively
exploited . Reports of Proof-of-Concept exploit code and detailed
analysis of the vulnerability are also publicly available. AusCERT
recommends that updates are applied as soon as possible.
An application may execute arbitrary code with kernel privileges.
Apple recommends updating to:
* macOS Big Sur 11.5.1 
* iOS 14.7.1 and iPadOS 14.7.1 
as soon as possible.
 About the security content of macOS Big Sur 11.5.1
 About the security content of iOS 14.7.1 and iPadOS 14.7.1
AusCERT has made every effort to ensure that the information contained
in this document is accurate. However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.
Australian Computer Emergency Response Team
The University of Queensland
Internet Email: firstname.lastname@example.org
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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