0xbinder/android-kernel-exploitation-labThis lab guides you through setting up an environment to explore CVE-2019-2215, a critical Android kernel vulnerability in the binder subsystem.
This lab guides you through setting up an environment to explore CVE-2019-2215, a critical Android kernel vulnerability in the binder subsystem.
This vulnerability is a use-after-free in the Android binder driver with the following characteristics:
Root Cause: When a binder fd is added to an epoll instance and then the thread exits, the binder_thread object is freed while still accessible through epoll.
Exploitation Path:
Impact: This vulnerability affects Android 8.x, 9.0, and early versions of 10, potentially allowing local privilege escalation to root.
Further Reading:
This lab is a work in progress. Here are planned improvements:
[ 3.030651] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x2868278d270, max_idle_ns: 440795290098 ns
[ 4.040338] clocksource: Switched to clocksource tsc
2025/03/24 21:04:23 running ssh: []string{"-p", "13199", "-F", "/dev/null", "-o", "UserKnownHostsFile=/dev/null", "-o", "IdentitiesOnly=yes", "-o", "BatchMode=yes", "-o", "StrictHostKeyChecking=no", "-o", "ConnectTimeout=10", "-i", "/home/0xbinder/android-kernel-exploitation-lab/bullseye.id_rsa", "-v", "root@localhost", "pwd"}
2025/03/24 21:04:33 ssh failed: failed to run ["ssh" "-p" "13199" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/home/0xbinder/android-kernel-exploitation-lab/bullseye.id_rsa" "-v" "root@localhost" "pwd"]: exit status 255
OpenSSH_9.9p2, OpenSSL 3.4.1 11 Feb 2025
debug1: Reading configuration data /dev/null
debug1: Connecting to localhost [::1] port 13199.
debug1: connect to address ::1 port 13199: Connection refused
debug1: Connecting to localhost [127.0.0.1] port 13199.
debug1: fd 3 clearing O_NONBLOCK
debug1: Connection established.
debug1: identity file /home/0xbinder/android-kernel-exploitation-lab/bullseye.id_rsa type 0
debug1: identity file /home/0xbinder/android-kernel-exploitation-lab/bullseye.id_rsa-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_9.9
Connection timed out during banner exchange
Connection to 127.0.0.1 port 13199 timed out
[ 3.030651] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x2868278d270, max_idle_ns: 440795290098 ns
[ 4.040338] clocksource: Switched to clocksource tsc
2025/03/24 21:04:23 running ssh: []string{"-p", "13199", "-F", "/dev/null", "-o", "UserKnownHostsFile=/dev/null", "-o", "IdentitiesOnly=yes", "-o", "BatchMode=yes", "-o", "StrictHostKeyChecking=no", "-o", "ConnectTimeout=10", "-i", "/home/0xbinder/android-kernel-exploitation-lab/bullseye.id_rsa", "-v", "root@localhost", "pwd"}
2025/03/24 21:04:33 ssh failed: failed to run ["ssh" "-p" "13199" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/home/0xbinder/android-kernel-exploitation-lab/bullseye.id_rsa" "-v" "root@localhost" "pwd"]: exit status 255
OpenSSH_9.9p2, OpenSSL 3.4.1 11 Feb 2025
debug1: Reading configuration data /dev/null
debug1: Connecting to localhost [::1] port 13199.
debug1: connect to address ::1 port 13199: Connection refused
debug1: Connecting to localhost [127.0.0.1] port 13199.
debug1: fd 3 clearing O_NONBLOCK
debug1: Connection established.
debug1: identity file /home/0xbinder/android-kernel-exploitation-lab/bullseye.id_rsa type 0
debug1: identity file /home/0xbinder/android-kernel-exploitation-lab/bullseye.id_rsa-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_9.9
Connection timed out during banner exchange
Connection to 127.0.0.1 port 13199 timed out
If you're interested in contributing to this project, please consider addressing any of the items above or submit your own ideas through a pull request.
particularly looking for help with:
If you have expertise in these areas, your contributions would be greatly appreciated!