macOS Security & Privilege Escalation
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If you are not familiar with macOS, you should start learning the basics of macOS:
Special macOS files & permissions:
Common macOS users
AppleFS
The architecture of the kernel
Common macOS network services & protocols
In companies macOS systems are highly probably going to be managed with a MDM. Therefore, from the perspective of an attacker is interesting to know how that works:
If a process running as root writes a file that can be controlled by a user, the user could abuse this to escalate privileges. This could occur in the following situations:
File used was already created by a user (owned by the user)
File used is writable by the user because of a group
File used is inside a directory owned by the user (the user could create the file)
File used is inside a directory owned by root but user has write access over it because of a group (the user could create the file)
Being able to create a file that is going to be used by root, allows a user to take advantage of its content or even create symlinks/hardlinks to point it to another place.
For this kind of vulnerabilities don't forget to check vulnerable .pkg
installers:
Weird apps registered by file extensions could be abused and different applications can be register to open specific protocols
In macOS applications and binaries can have permissions to access folders or settings that make them more privileged than others.
Therefore, an attacker that wants to successfully compromise a macOS machine will need to escalate its TCC privileges (or even bypass SIP, depending on his needs).
These privileges are usually given in the form of entitlements the application is signed with, or the application might requested some accesses and after the user approving them they can be found in the TCC databases. Another way a process can obtain these privileges is by being a child of a process with those privileges as they are usually inherited.
Of course from a red teams perspective you should be also interested in escalating to root. Check the following post for some hints:
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Opensource macOS:
To download a tar.gz
change a URL such as to
Follow these links to find different was to , to and how in the past .
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