Apple macOS Sierra 10.12.1 – ‘physmem’ Local Privilege Escalation
## physmem <!-- Brandon Azad --> physmem is a physical memory inspection tool and local privilege escalation targeting macOS up through 10.12.1. It exploits either [CVE-2016-1825] or [CVE-2016-7617] depending on the deployment target. These two vulnerabilities are nearly identical, and exploitation can be done exactly the same. They were patched in OS X El Capitan [10.11.5] and macOS Sierra [10.12.2], respectively. [CVE-2016-1825]: https://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2016-1825 [CVE-2016-7617]: https://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2016-7617 [10.11.5]: https://support.apple.com/en-us/HT206567 [10.12.2]: https://support.apple.com/en-us/HT207423 Because these are logic bugs, exploitation is incredibly reliable. I have not yet experienced a panic in the tens of thousands of times I've run a program (correctly) exploiting these vulnerabilities. ### CVE-2016-1825 CVE-2016-1825 is an issue in IOHIDevice which allows setting arbitrary IOKit registry properties. In particular, the privileged property IOUserClientClass can be controlled by an unprivileged process. I have not tested platforms before Yosemite, but the vulnerability appears in the source code as early as Mac OS X Leopard. ### CVE-2016-7617 CVE-2016-7617 is an almost identical issue in AppleBroadcomBluetoothHostController. This vulnerability appears to have been introduced in OS X El Capitan. It was reported by Ian Beer of Google's Project Zero (issue [974]) and Radu Motspan. [974]: https://bugs.chromium.org/p/project-zero/issues/detail?id=974 ### Building Build physmem by specifying your deployment target on the command line: $ make MACOSX_DEPLOYMENT_TARGET=10.10.5 ### Running You can read a word of physical memory using the read command: $ ./physmem read 0x1000 a69a04f2f59625b3 You can write to physical memory using the write command: $ ./physmem write 0x1000 0x1122334455667788 $ ./physmem read 0x1000 1122334455667788 You can exec a root shell using the root command: $ ./physmem root sh-3.2# whoami root ### License The physmem code is released into the public domain. As a courtesy I ask that if you reference or use any of this code you attribute it to me. Download: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/44237.zip |