Three Dark clouds over the Android kernel
Yao Jun, PoC conference 2020
A good talk about Kernel Space Mirror Attack (KSMA) and SLAB Mirror Attack (SMA) against the Linux kernel.
Slides:
https://github.com/2freeman/Slides/blob/main/PoC-2020-Three%20Dark%20clouds%20over%20the%20Android%20kernel.pdf
Yao Jun, PoC conference 2020
A good talk about Kernel Space Mirror Attack (KSMA) and SLAB Mirror Attack (SMA) against the Linux kernel.
Slides:
https://github.com/2freeman/Slides/blob/main/PoC-2020-Three%20Dark%20clouds%20over%20the%20Android%20kernel.pdf
GitHub
Slides/PoC-2020-Three Dark clouds over the Android kernel.pdf at main · 2freeman/Slides
Contribute to 2freeman/Slides development by creating an account on GitHub.
Shared mapping leak in Qualcomm Adreno GPU
Another bug in Adreno GPU disclosed by Ben Hawkes from Project Zero — an infoleak this time. The fun part: Qualcomm's attempt to fix this introduced an exploitable use-after-free.
https://bugs.chromium.org/p/project-zero/issues/detail?id=2092
Another bug in Adreno GPU disclosed by Ben Hawkes from Project Zero — an infoleak this time. The fun part: Qualcomm's attempt to fix this introduced an exploitable use-after-free.
https://bugs.chromium.org/p/project-zero/issues/detail?id=2092
Kernel Integrity Enforcement with HLAT
Protecting the kernel from page-tables–based attacks with Hypervisor-managed Linear Address Translation Intel VT-x extension. A concept by Gao Chao from Intel.
Video: https://www.youtube.com/watch?v=N8avvE_neV0
Slides: https://static.sched.com/hosted_files/osseu2020/ce/LSSEU20_kernel%20integrity%20enforcement%20with%20HLAT%20in%20a%20virtual%20machine_v3.pdf
Protecting the kernel from page-tables–based attacks with Hypervisor-managed Linear Address Translation Intel VT-x extension. A concept by Gao Chao from Intel.
Video: https://www.youtube.com/watch?v=N8avvE_neV0
Slides: https://static.sched.com/hosted_files/osseu2020/ce/LSSEU20_kernel%20integrity%20enforcement%20with%20HLAT%20in%20a%20virtual%20machine_v3.pdf
YouTube
Kernel Integrity Enforcement with HLAT In a Virtual Machine - Chao Gao, Intel Corporation
An iOS hacker tries Android
A writeup for the vulnerability in Samsung Neural Processing Unit from a few weeks ago. By Brandon Azad.
https://googleprojectzero.blogspot.com/2020/12/an-ios-hacker-tries-android.html
A writeup for the vulnerability in Samsung Neural Processing Unit from a few weeks ago. By Brandon Azad.
https://googleprojectzero.blogspot.com/2020/12/an-ios-hacker-tries-android.html
Blogspot
An iOS hacker tries Android
Written by Brandon Azad, when working at Project Zero One of the amazing aspects of working at Project Zero is having the flexibility to dir...
Exploiting a Single Instruction Race Condition in Binder
Yet another exploitable use-after-free in Binder. By Maxime Peterlin, Philip Pettersson, Alexandre Adamski, and Alex Radocea.
https://blog.longterm.io/cve-2020-0423.html
Yet another exploitable use-after-free in Binder. By Maxime Peterlin, Philip Pettersson, Alexandre Adamski, and Alex Radocea.
https://blog.longterm.io/cve-2020-0423.html
Broken locking in TIOCSPGRP leads to corrupted refcount
A vulnerability in the TTY subsystem. Potentially exploitable — a strategy mentioned. By Jann Horn from Project Zero.
https://bugs.chromium.org/p/project-zero/issues/detail?id=2125
A vulnerability in the TTY subsystem. Potentially exploitable — a strategy mentioned. By Jann Horn from Project Zero.
https://bugs.chromium.org/p/project-zero/issues/detail?id=2125
Locating the kernel PGD on Android/aarch64
A post-exploitation technique for locating Android kernel page tables.
https://duasynt.com/blog/android-pgd-page-tables
Bonus: GDB noscript for getting the PTE entry based on a virtual address: https://github.com/duasynt/gdb_noscripts/
A post-exploitation technique for locating Android kernel page tables.
https://duasynt.com/blog/android-pgd-page-tables
Bonus: GDB noscript for getting the PTE entry based on a virtual address: https://github.com/duasynt/gdb_noscripts/
MTE-based KASAN merged into mainline
My two patchsets that add a new Hardware Tag-Based KASAN mode that's based on arm64 Memory Tagging Extension have been merged. Eventually, MTE is planned to be used as an in-kernel memory corruption mitigation.
These cover letters describe the changes:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=11f094e312ae834531672aee711079c00ca39ff8
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c696de9f12b7ddeddc05d378fc4dc0f66e9a8c95
My two patchsets that add a new Hardware Tag-Based KASAN mode that's based on arm64 Memory Tagging Extension have been merged. Eventually, MTE is planned to be used as an in-kernel memory corruption mitigation.
These cover letters describe the changes:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=11f094e312ae834531672aee711079c00ca39ff8
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c696de9f12b7ddeddc05d378fc4dc0f66e9a8c95
CVEhound
A tool for checking the Linux kernel source code for known CVEs. The tool uses coccinelle rules and grep to detect the code patterns of known unpatched CVEs. Developed by Denis Efremov.
https://github.com/evdenis/cvehound
A tool for checking the Linux kernel source code for known CVEs. The tool uses coccinelle rules and grep to detect the code patterns of known unpatched CVEs. Developed by Denis Efremov.
https://github.com/evdenis/cvehound
GitHub
GitHub - evdenis/cvehound: Check linux sources dump for known CVEs.
Check linux sources dump for known CVEs. Contribute to evdenis/cvehound development by creating an account on GitHub.
Exploit for CVE-2020-27194
Simon Scannell published an exploit for the eBPF JIT bug he had previously found via fuzzing.
Exploit: https://github.com/scannells/exploits/tree/master/CVE-2020-27194
Article: https://scannell.me/fuzzing-for-ebpf-jit-bugs-in-the-linux-kernel/
Simon Scannell published an exploit for the eBPF JIT bug he had previously found via fuzzing.
Exploit: https://github.com/scannells/exploits/tree/master/CVE-2020-27194
Article: https://scannell.me/fuzzing-for-ebpf-jit-bugs-in-the-linux-kernel/
GitHub
exploits/CVE-2020-27194 at master · scannells/exploits
Some exploits I have written to showcase and to share - scannells/exploits
Android Security Bulletin — January 2021
Includes fixes for an info-leak in core dumps found by KMSAN, some speculative execution attacks, and for a bunch of Qualcomm drivers.
https://source.android.com/security/bulletin/2021-01-01
Includes fixes for an info-leak in core dumps found by KMSAN, some speculative execution attacks, and for a bunch of Qualcomm drivers.
https://source.android.com/security/bulletin/2021-01-01
A Samsung RKP Compendium
A blog post that covers the internals of the Samsung Real-time Kernel Protection (RKP) and exploitation of a bug in RKP that allows getting code execution in EL2 (hypervisor).
https://blog.longterm.io/samsung_rkp.html
A blog post that covers the internals of the Samsung Real-time Kernel Protection (RKP) and exploitation of a bug in RKP that allows getting code execution in EL2 (hypervisor).
https://blog.longterm.io/samsung_rkp.html
In-the-Wild Series: Android Exploits
P0 published the analysis of an exploit chain detected in-the-wild. All Android kernel exploits in the chain are based on N-day bugs.
Android kernel bugs: https://googleprojectzero.blogspot.com/2021/01/in-wild-series-android-exploits.html
Full series: https://googleprojectzero.blogspot.com/2021/01/introducing-in-wild-series.html
P0 published the analysis of an exploit chain detected in-the-wild. All Android kernel exploits in the chain are based on N-day bugs.
Android kernel bugs: https://googleprojectzero.blogspot.com/2021/01/in-wild-series-android-exploits.html
Full series: https://googleprojectzero.blogspot.com/2021/01/introducing-in-wild-series.html
Blogspot
In-the-Wild Series: Android Exploits
This is part 4 of a 6-part series detailing a set of vulnerabilities found by Project Zero being exploited in the wild. To read the other pa...
Hack The Box — RopeTwo
A write-up for a Hack The Box lab that included a vulnerable kernel module.
https://0xdf.gitlab.io/2021/01/16/htb-ropetwo.html
A write-up for a Hack The Box lab that included a vulnerable kernel module.
https://0xdf.gitlab.io/2021/01/16/htb-ropetwo.html
0xdf hacks stuff
HTB: RopeTwo
RopeTwo, much like Rope, was just a lot of binary exploitation. It starts with a really neat attack on Google’s v8 JavaScript engine, with a couple of newly added vulnerable functions to allow out of bounds read and write. I’ll use that with an XSS vulnerability…
eBPF: bug in the BPF_RSH instruction
The bug affects kernels from 4.9 to 4.13 and requires CAP_SYS_ADMIN to be triggered. Found by Ryota Shiga and reported to ZDI in April 2020.
https://www.zerodayinitiative.com/blog/2021/1/18/zdi-20-1440-an-incorrect-calculation-bug-in-the-linux-kernel-ebpf-verifier
The bug affects kernels from 4.9 to 4.13 and requires CAP_SYS_ADMIN to be triggered. Found by Ryota Shiga and reported to ZDI in April 2020.
https://www.zerodayinitiative.com/blog/2021/1/18/zdi-20-1440-an-incorrect-calculation-bug-in-the-linux-kernel-ebpf-verifier
Zero Day Initiative
Zero Day Initiative — ZDI-20-1440: An Incorrect Calculation Bug in the Linux Kernel eBPF Verifier
In April 2020, the ZDI received a Linux kernel submission that turned out to be an incorrect calculation bug in the extended Berkeley Packet Filter (eBPF) verifier. If you’re not familiar with it, eBPF is a Linux subsystem that is designed to safely execute…
Exploiting CVE-2014-3153 (Towelroot)
An exploit write-up for an old bug that was originally used to root Android phones. This exploit, however, targets 32-bit Ubuntu. By Elon Gliksberg.
https://elongl.github.io/exploitation/2021/01/08/cve-2014-3153.html
An exploit write-up for an old bug that was originally used to root Android phones. This exploit, however, targets 32-bit Ubuntu. By Elon Gliksberg.
https://elongl.github.io/exploitation/2021/01/08/cve-2014-3153.html
Elon Gliksberg
Exploiting CVE-2014-3153 (Towelroot)
Understanding The Kernel
Learning Linux Kernel Exploitation
Linux kernel exploitation tutorials. Part 1 covers the basic ret2usr technique, part 2 expands it with SMEP and KPTI bypasses.
Part 1: https://lkmidas.github.io/posts/20210123-linux-kernel-pwn-part-1/
Part 2: https://lkmidas.github.io/posts/20210128-linux-kernel-pwn-part-2/
Linux kernel exploitation tutorials. Part 1 covers the basic ret2usr technique, part 2 expands it with SMEP and KPTI bypasses.
Part 1: https://lkmidas.github.io/posts/20210123-linux-kernel-pwn-part-1/
Part 2: https://lkmidas.github.io/posts/20210128-linux-kernel-pwn-part-2/
My cool site
Learning Linux Kernel Exploitation - Part 1
The first part of the series about learning Linux kernel exploitation through hxpCTF2020 kernel-rop: Setting up the environment and the simplest technique of ret2usr
Exploiting Samsung NPU memory corruption
Another write-up that covers the Samsung NPU vulnerability ( CVE-2020-28343/SVE-2020-18610) previously found and reported by P0.
https://github.com/vngkv123/articles/blob/main/Galaxy's%20Meltdown%20-%20Exploiting%20SVE-2020-18610.md
Another write-up that covers the Samsung NPU vulnerability ( CVE-2020-28343/SVE-2020-18610) previously found and reported by P0.
https://github.com/vngkv123/articles/blob/main/Galaxy's%20Meltdown%20-%20Exploiting%20SVE-2020-18610.md
Android Security Bulletin — February 2021
One kernel bug in IPv6 and a bunch of issues in Qualcomm drivers.
https://source.android.com/security/bulletin/2021-02-01#kernel-components
One kernel bug in IPv6 and a bunch of issues in Qualcomm drivers.
https://source.android.com/security/bulletin/2021-02-01#kernel-components
VDSO As A Potential KASLR Oracle
A research that shows how to use Spectre to leak VDSO kernel address on arm64. By Philip Pettersson and Alex Radocea.
https://www.longterm.io/vdso_sidechannel.html
A research that shows how to use Spectre to leak VDSO kernel address on arm64. By Philip Pettersson and Alex Radocea.
https://www.longterm.io/vdso_sidechannel.html
Linux kernel: Exploitable vulnerabilities in AF_VSOCK implementation
In January I found, exploited, fixed and responsibly disclosed Linux kernel vulnerabilities in virtual sockets.
Public announcement: https://seclists.org/oss-sec/2021/q1/107
My PoC exploit gains LPE on Fedora Server 33 for x86_64 bypassing SMEP and SMAP. I'll share all the details later.
// by @a13xp0p0v
In January I found, exploited, fixed and responsibly disclosed Linux kernel vulnerabilities in virtual sockets.
Public announcement: https://seclists.org/oss-sec/2021/q1/107
My PoC exploit gains LPE on Fedora Server 33 for x86_64 bypassing SMEP and SMAP. I'll share all the details later.
// by @a13xp0p0v