since I always rant about how I don't like biometrics in smartphones some people have asked me to formulate what I actually would like to see to happen in this area.
My dislike for biometrics is that you cannot change your password anymore because your password is your finger, eye (iris), or face. That means you basically show you password to everybody. A good example of this is here: Politician's fingerprint 'cloned from photos' by hacker.
The second part of the problem is that many biometric systems can be easily bypassed, some face recognition systems even with a picture shown on a smartphone screen.
My main issue is that biometric systems can be bypassed by forcing the owner of the device to unlock it. This can be done without leaving evidence, a funny example of this issue: 7-Year-Old Boy Uses Sleeping Dad's Finger To Unlock iPhone. Also see this interesting case: Court rules against man who was forced to fingerprint-unlock his phone.
The main argument I always hear is that people who wouldn't set a password (or use just a simple PIN) are using biometrics and therefore are more secure now with the help of biometrics. The kid from the previous story wasn't stopped by biometrics it was just as good as not having a password.
What would have stopped the kid from unlocking his dad's phone? A simple timeout! Basically what I want to see is a timeout for your biometrics. Once you entered your password you can unlock your phone using biometrics, after a specific amount of time you have to re-enter your password and cannot unlock the device using biometrics. With a timeout of say 30 minutes to one hour you can prevent simple attacks while still being able to use the convenience of biometrics. Apple recently introduced the SOS mode that will also disable biometric authentication until you enter your password. I wish this was taken one step further and let you set a timeout.
I personally see biometrics on a smartphone as a pure convenience feature and treat it as a weak security feature. I only use it for ApplePay.
I think it is pretty bad to get people used to biometric authentication, Apple may get it right but other companies wont. Normal users can't determine this easily. Also how much did the additional hardware components cost to implement fingerprint authentication or face recognition. FaceID doesn't use a normal camera so there are definitely additional costs that you as the user have to pay for this convenience feature.
Face recognition in consumer products also gets people to accept this as an normal everyday thing and thus helps the argument for face recognition being used in surveillance.
Chaos Computer Clubs breaks iris recognition system of the Samsung Galaxy S8 in May 2017
Chaos Computer Club breaks Apple TouchID iPhone 5s in 2013
ekoparty Sep 27-29, Buenos Aires. Blue Pill for your phone by Oleksandr Bazhaniuk. Unbox Your Phone - Exploring and Breaking Samsung's TrustZone Sandboxes by Daniel Komaromy. Inside Android's SafetyNet Attestation: Attack and Defense by Collin Mulliner. How to cook Cisco: Exploit Development for Cisco IOS by George Nosenko. Bypass Android Hack by Marcelo Romero.Some comments on BlueBorne: I've been involved with Bluetooth security since like forever (not active in the last 10+ years). The early Bluetooth vulnerabilities were mostly logic bugs and issues such as missing authentication. Bluetooth devices could not be set to hidden and would always show up when scanning for devices. Stuff like that. BlueBorne is different as it is a remote exploitable memory corruption vulnerability in Linux, Android, and Windows. This is quite a novelty since we haven't seen a bug that is more ore less the same on two platforms. Even more interesting is that this bug is pre-authentication and gives you kernel privileges (code exec in the kernel).
Virus Bulletin 4-6 Oct, Madrid Span. Last-minute paper: Publishing our malware stats by Jason Woloz (Google) [This is about Android Malware]. Android reverse engineering tools: not the usual suspects by Axelle Apvrille.
In theory this set of vulnerabilities can be bad, bad. In practice the issue is much less of an issue. Exploit mitigations and built variances help mitigating the risk. Devices are not always visible therefore the attacker cannot easily find your device and attack it.
Also see: Hackers Could Silently Hack Your Cellphone And Computers Over Bluetooth.
FaceID: I think it is a really horrible idea! Do not put biometric systems in to consumer products ever! I will not buy products with mandatory biometrics so far iOS allows me to turn it off and use a passphrase - thats why I even consider buying iOS devices. I hate this change -- biometrics are bad.
Huh, here I was looking to get a phone similar to Walmarts in-store model... And eBay just has their actual in-store model... Perfect! pic.twitter.com/sq4pUtCBe3— Tim Strazzere (@timstrazz) September 17, 2017
https://t.co/zqdwIa27IR— sp (@LambdaCube) August 28, 2017
"Certified devices are also required to ship without pre-installed malware"
A good requirement IMHO. 😛
I agree ^^^
SELinux in Android Oreo or: How I Learned to Stop Worrying and Love Attributes (presentation)
Kernel Driver mmap Handler Exploitation (paper)
BabelView: Evaluating the Impact of Code Injection Attacks in Mobile Webviews (paper)
AndroidXRef now with Android O/8
Now the native-shim loader can create VM's for ART based Android devices by rednaga
Good thread about the Android Key Store API
IDA AArch64 processor extender extension: Adding support for ARMv8.1 opcodes
INJECTING MISSING METHODS AT RUNTIME
Oppo/Oneplus .ops Firmware decrypter
Android Hardware-backed Keystore (docs)
Samsung to Launch Mobile Security Rewards Program, Welcoming Security Research Community
Android 8.0 includes the following security-related changes
WHAT'S NEW IN KNOX 2.9?
ANDROID O AND DEX 38: DALVIK OPCODES FOR DYNAMIC INVOCATION
The public release of shadow v2 jemalloc exploitation tool with support for Android (both ARM32 and ARM64)
Making it safer to get apps on Android O
Dig Deep into FlexiSpy for Android
Tool for leaking and bypassing Android malware detection system
iOS 8.4.1 32 bit jailbreak
toorcon san diego Aug 28th - Sep 3rd. Dig Deep into FlexiSpy for Android by Kai Lu(@k3vinlusec).Quick Conference Review
HITB Singapore August 21-25. The Original Elevat0r - History of a Private Jailbreak by Stefan Esser. The Nightmare of Fragmentation: A Case Study of 200+ Vulnerabilities in Android Phones by BAI GUANGDONG and ZHANG QING.
Tencent Security Conference, August 30-31. Pointer Authentication by Robert James Turner. Finding iOS vulnerabilities in an easy way by Tiefel Wang and Hao Xu. Bare-metal program tracing on ARM by Ralf-Philipp Weinmann.
44con 13-15 September London, UK. Inside Android's SafetyNet Attestation: What it can and can't do lessons learned from a large scale deployment by Collin Mulliner.
BalCCon2k17 Novi Sad, Vojvodina, Serbia. September 15-17. Mobile phone surveillance with BladeRF by Nikola Rasovic.
T2 October 26-27 Helsinki, Finland. Breaking Tizen by Amihai Neiderman.
DeepSec Vienna 13-17 November. Normal permissions in Android: An Audiovisual Deception by Constantinos Patsakis. How secure are your VoLTE and VoWiFi calls? by Sreepriya Chalakkal.
It was good to see everybody in Vegas, even better meeting new people. Especially some folks I wanted to meet for a long time. I had a good time at WOOT, meeting old friends was especially good. Maybe it helped that it was in the CanSecWest hotel. I link a few relevant papers below.
Stefan Esser is running a kickstarter for an iOS Kernel Exploitation Training Course for Development of a freely available online iOS kernel exploitation training course based on iOS 9.3.5 on 32 bit devices. If you are into iOS security you should support Stefan's project!
Ralf is on point as usual:
Pictures of the month:
Exhibit A) Our communities are tribalized: https://t.co/e1uATFviYT (JTAG on iPhone 4S BB + exploitation of baseband vulns from SIM, in 2014)— Ralf (RPW) (@esizkur) August 19, 2017
Burner kiddies at defcon be like: pic.twitter.com/3QyPTuJwFg— the grugq (@thegrugq) July 22, 2017
Some Chinese USB adapters have a hidden SIM that will send a text message with GPS coordinates to track an unknowing victim… https://t.co/PK5bpkaBmv— Dimitri Bouniol (@dimitribouniol) August 9, 2017
中国のUSB充電アダプター型盗聴器が先進的すぎる。— 若ちゃん (@wk_tyn) August 8, 2017
BootStomp: On the Security of Bootloaders in Mobile Devices (paper)
Fixes in iOS 10.3.3
Reviewing the Security of ASoC Drivers in Android Kernel
Hacking Cell Phone Embedded Systems
Intercept, modify, repeat and attack Android's Binder transactions using Burp Suite
Seccomp filter in Android O
This source code was obtained by reversing a sample of SLocker. It's not the original source code
Trust Issues: Exploiting TrustZone TEEs
Universal Android SSL Pinning bypass with Frida
USING AN RTL-SDR AS A SIMPLE IMSI CATCHER
BROADPWN: REMOTELY COMPROMISING ANDROID AND IOS VIA A BUG IN BROADCOM'S WI-FI CHIPSETS
Surveillance: German police ready to hack WhatsApp messages
Google May Have Just Uncovered An Israeli Surveillance Start-Up Spying On Androids
Gas Pump Skimmer Sends Card Data Via Text
Defeating Samsung KNOX with zero privilege (slides)
Path of Least Resistance: Cellular Baseband to Application Processor Escalation on Mediatek Devices
Port(al) to the iOS Core
New Adventures in Spying 3G & 4G Users: Locate, Track, Monitor
Ghost Telephonist Link Hijack Exploitations in 4G
OnePlus 2 Lack of SBL1 Validation Broken Secure Boot
iOS 10.3.2 XPC Userland Jailbreak Exploit Tutorial - CVE-2017-7047 by Ian Beer (Video)
Samsung: Trustonic t-base TEE does not perform revocation of trustlets
A (hopefully) generic unpacker for packed Android apps
The original elevat0r jailbreak exploit explained
Tinker is a hot-fix solution library for Android, it supports dex, library and resources update without reinstall apk.
Shattered Trust: When Replacement Smartphone Components Attack (paper)
Patch iOS Apps, The Easy Way, Without Jailbreak
Android Banking Trojan misuses accessibility services
Get details and download apps from https://play.google.com by emulating an Android (Nexus 5X) device by default.
vTZ: Virtualizing ARM TrustZone (paper)
objection - runtime mobile exploration
Xposed for Nougat & abforce Submodule Explained, and Why It's Worth Waiting for rovo89's Full Release
A Linux kernel IPC firewall and logger for Android and Binder
White-Stingray: Evaluating IMSI Catchers Detection Applications (paper)
BootStomp: a bootloader vulnerability finder
iOS 11 has a 'cop button' to temporarily disable Touch ID
Simple tool to dynamically discover hidden fastboot OEM commands based on static knowledge
Blue Pill for your Phone
Android Instant Apps: Best practices for managing download size (who has played with instant apps yet?)
Decrypt the iOS SEP
How much does your phone know about you?
Identifying and Evading Android Protections
Breaking Mobile App Protection Mechanisms
Isolation of HALs in Android O
ANTIVIRUS FOR ANDROID HAS A LONG, LONG WAY TO GO
Fake Snapchat in Google Play Store
Next-generation Dex Compiler Now in Preview
Detecting Android Root Exploits by Learning from Root Providers (paper)
Downgrade Attack on TrustZone (paper)
Testing Biometric Authentication
shadow v2 public release
Android O security changes
SonicSpy: Over a thousand spyware apps discovered, some in Google Play
SMS touch sends customer information and SMS messages over a cleartext network
ZIMPERIUM blog post that describes how the Zero Packet Inspection (ZPI) approach is trained
Using Hover to Compromise the Confidentiality of User Input on Android (paper)
Various Scripts for Mobile Pen-testing with Frida
circuit board (PCB) schematics for 30-pin iPod serial debugging
SS7 Attacker Heaven turns into Riot: How to make Nation-State and Intelligence Attackers' lives much harder on mobile networks (slides)
This blog post is to provide some more details about my idea that was mentioned on Risky Business #463 by Haroon Meer.
What are Canary Tokens (from Thinkst).
You'll be familiar with web bugs, the transparent images which track when someone opens an email. They work by embedding a unique URL in a page's image tag, and monitoring incoming GET requests.
Imagine doing that, but for file reads, database queries, process executions, patterns in log files, Bitcoin transactions or even Linkedin Profile views. Canarytokens does all this and more, letting you implant traps in your production systems rather than setting up separate honeypots.
Canary tokens are a free, quick, painless way to help defenders discover they've been breached (by having attackers announce themselves.)
The idea: Embed Canary Tokens into binaries (or application data) to help identify reverse engineering of your software.
Every reverse engineer looks for unique information (often just strings) in the target binary to help understand it. The strings are thrown into Google (or other search engines) with the hope to get additional information. The returned information can be extremely helpful to determine what the software is, what other code is linked in, what versions, etc. Everybody who reverse engineers stuff does this! I personally don't reverse engineer for a living so I asked around to confirm that professionals actually do this (I already knew the answer anyway!).
- Embed unique looking strings into the binary
- Stand-up web page that contains the string, log access to that page (alert on access)
- Make Google crawl that page (various tools for that)
- Ship software
This is pretty straight forward, right? But do you care about somebody who just ran strings on your binary? Likely not! So what's next?
Many applications protect their code and other assets that come with it through different kinds of methods (called obfuscation techniques for this article - even not all of it will be actual obfuscation). The next step for the RE-canaries is to generate canaries and embed them into each obfuscation layer. If someone accesses a more obfuscated canary you know that a certain level of effort was put into reversing your app. This part is really where the creativity of the RE-canary deployment comes into play. This will be highly depended on the specific software, on the protection mechanisms used, the language and framework that app is written in and so on. Mobile apps (I'm a mobile app guy, yeah!) contain API endpoints and URLs and maybe some hardcoded credentials (tokens of course). The URLs have the advantage that you wouldn't need to put up a website. You just make them accessible and add logging and alerting.
The final part of this is automation. You want to automate canary creation and embedding into your built process, so that you can generate unique canaries with each built or major release or whatever fits your software.
In the end it will likely happen that advanced REs are going to use an anonymization service such as TOR when searching for strings or trying out URLs (specifically for URLs!). In this case at least you will know that someone is looking at your stuff and passed a certain skill/time/effort threshold, which I guess in most cases is enough information.
That's it! This idea was inspired heavily by Haroon Meer's Canarytokens a great free service that I use once in awhile!
Comments and feedback is welcome via the usual channels.
Black Hat USA Las Vegas, July 26-27. ALL YOUR SMS & CONTACTS BELONG TO ADUPS & OTHERS by Angelos Stavrou, Azzedine Benameur, Ryan Johnson. NEW ADVENTURES IN SPYING 3G AND 4G USERS: LOCATE, TRACK & MONITOR by Altaf Shaik, Andrew Martin, Jean-Pierre Seifert, Lucca Hirschi, Ravishankar Borgaonkar, Shinjo Park. SS7 ATTACKER HEAVEN TURNS INTO RIOT: HOW TO MAKE NATION-STATE AND INTELLIGENCE ATTACKERS' LIVES MUCH HARDER ON MOBILE NETWORKS by Martin Kacer, Philippe Langlois. FIGHTING TARGETED MALWARE IN THE MOBILE ECOSYSTEM by Andrew Blaich, Megan Ruthven. GHOST TELEPHONIST LINK HIJACK EXPLOITATIONS IN 4G LTE CS FALLBACK by Haoqi Shan, Jun Li, Lin Huang, Qing Yang, Yuwei Zheng. HONEY, I SHRUNK THE ATTACK SURFACE – ADVENTURES IN ANDROID SECURITY HARDENING by Nick Kralevich. DEFEATING SAMSUNG KNOX WITH ZERO PRIVILEGE by Di Shen. BLUE PILL FOR YOUR PHONE by Oleksandr Bazhaniuk, Yuriy Bulygin. CLOAK & DAGGER: FROM TWO PERMISSIONS TO COMPLETE CONTROL OF THE UI FEEDBACK LOOP by Chenxiong Qian, Simon Pak Ho Chung, Wenke Lee, Yanick Fratantonio.Black Hat and Defcon have a really good number of mobile related talks this year.
Defcon Las Vegas. Jailbreaking Apple Watch by Max Bazaliy. Inside the "Meet Desai" Attack: Defending Distributed Targets from Distributed Attacks by CINCVolFLT (Trey Forgety). macOS/iOS Kernel Debugging and Heap Feng Shui by Min(Spark) Zheng & Xiangyu Liu. Using GPS Spoofing to Control Time by David "Karit" Robinson. Phone System Testing and Other Fun Tricks by "Snide" Owen. Unboxing Android: Everything You Wanted To Know About Android Packers by Avi Bashan & Slava Makkaveev. Ghost in the Droid: Possessing Android Applications with ParaSpectre by chaosdata. Ghost Telephonist' Impersonates You Through LTE CSFB by Yuwei Zheng & Lin Huang. Bypassing Android Password Manager Apps Without Root by Stephan Huber & Siegfried Rasthofer. Man in the NFC by Haoqi Shan & Jian Yuan.
USENIX Workshop on Offensive Technologies (WOOT) Vancouver Canada, 14-15 August. Shattered Trust: When Replacement Smartphone Components Attack by Omer Shwartz, Amir Cohen, Asaf Shabtai, and Yossi Oren. White-Stingray: Evaluating IMSI Catchers Detection Applications by Shinjo Park and Altaf Shaik, Ravishankar Borgaonkar, Andrew Marti, Jean-Pierre Seifert. fastboot oem vuln by Roee Hay.
It was a busy month and July will be even busier. I'll be at GSMA DSG, Black Hat and Defcon July and Usenix WOOT in mid August
OEM just told Google a bug I submitted isn't a bug. It is a FULL permement secureboot bypass.— Jon Sawyer (@jcase) July 6, 2017
Picture of month:
Liang Chen is demostrating iOS 11.0 beta 2 jailbreak on iPhone 7. pic.twitter.com/wA7U9AQ32E— vangelis (@vangelis_at_POC) June 23, 2017
There is a lot happening in the Android boot loader world at the moment. I guess this is what happens when the devices get more and more locked down - people go after the root of trust.
Emulation and Exploration of BCM WiFi Frame Parsing using LuaQEMU
New attack can now decrypt satellite phone calls in "real time"
Library injection for debuggable Android apps
Attack TrustZone with Rowhammer
All slides from MOSEC 2017
Researchers Build Firewall to Deflect SS7 Attacks
Android Security Bulletin - July 2017
mobile CTF by HackerOne
Secure Mobile Application Development
ANDROID O AND DEX 38: DALVIK OPCODES FOR DYNAMIC INVOCATION
IMSecure - Attacking VoLTE (and other Stuff)
Telecom Signaling Exploitation Framework - SS7, GTP, Diameter & SIP
Thieves caught hours after stealing GPS tracking devices from tech company
How the Osmocom GSM stack is funded
OWASP list of the most important security tools for Android and iOS
For $500, this site promises the power to track a phone and intercept its texts
A recopilatory of useful android tools
Privacy Threats through Ultrasonic Side Channels on Mobile Devices (paper)
Subscribers remote geolocation and tracking using 4G VoLTE enabled Android phone (paper)
Breaking and Fixing VoLTE: Exploiting Hidden Data Channels and Mis-implementations (paper)
Dvmap: the first Android malware with code injection
JNI method enumeration in ELF files
root shell on Moto G4 & G5 with a Secure Boot and Device Locking Bypass
Breaking Samsung Galaxy Secure Boot through Downloaded mode (paper)
A very minimalist smali emulator that could be used to "decrypt" obfuscated strings
anti vm on android
Back That App Up: Gaining Root on the Lenovo Vibe
PoCs for Android July bulletin: CVE-2017-8260 CVE-2017-0705 CVE-2017-8259
Secure initialization of TEEs: when secure boot falls short
Reverse Engineering Samsung S6 SBOOT - Part II
No permission required for SMS verification in Android O
Black Hat USA July 26-27 Las Vegas. 'GHOST TELEPHONIST' LINK HIJACK EXPLOITATIONS IN 4G LTE CS FALLBACK by Haoqi Shan, Jun Li, Lin Huang, Qing Yang, Yuwei Zheng. ALL YOUR SMS & CONTACTS BELONG TO ADUPS & OTHERS by Angelos Stavrou, Azzedine Benameur, Ryan Johnson. BROADPWN: REMOTELY COMPROMISING ANDROID AND IOS VIA A BUG IN BROADCOM'S WI-FI CHIPSETS by Nitay Artenstein. CLOAK & DAGGER: FROM TWO PERMISSIONS TO COMPLETE CONTROL OF THE UI FEEDBACK LOOP by Chenxiong Qian, Simon Pak Ho Chung, Wenke Lee, Yanick Fratantonio. DEFEATING SAMSUNG KNOX WITH ZERO PRIVILEGE by Di Shen. FIGHTING TARGETED MALWARE IN THE MOBILE ECOSYSTEM by Andrew Blaich, Megan Ruthven. HONEY, I SHRUNK THE ATTACK SURFACE – ADVENTURES IN ANDROID SECURITY HARDENING by Nick Kralevich. NEW ADVENTURES IN SPYING 3G AND 4G USERS: LOCATE, TRACK & MONITOR by Altaf Shaik, Andrew Martin, Jean-Pierre Seifert, Lucca Hirschi, Ravishankar Borgaonkar, Shinjo Park. SONIC GUN TO SMART DEVICES: YOUR DEVICES LOSE CONTROL UNDER ULTRASOUND/SOUND by Aimin Pan, Bo Yang, Shangyuan LI, Wang Kang, Zhengbo Wang. SS7 ATTACKER HEAVEN TURNS INTO RIOT: HOW TO MAKE NATION-STATE AND INTELLIGENCE ATTACKERS' LIVES MUCH HARDER ON MOBILE NETWORKS by Martin Kacer, Philippe Langlois. THE FUTURE OF APPLEPWN - HOW TO SAVE YOUR MONEY by Timur Yunusov.This took a long time again. It gets harder and harder do to this since this stuff is not directly what I do on a day to day basis currently.
(Black Hat has a very strong mobile security line up this year.)
Defcon July 27-30 Las Vegas. Man in the NFC by Haoqi Shan & Jian Yuan. (speaker selection not final)
MOSEC June, Shanghai added a bunch of talks (all mobile security related, obviously).
Recon June 16-18 Montreal, Canada. FreeCalypso: a fully liberated GSM baseband by Mychaela Falconia. Hacking Cell Phone Embedded Systems by Keegan Ryan.
The Qualcomm Mobile Security summit was excellent again! Fantastic talks and again I met a bunch of people I mostly knew from email and/or twitter or haven't seen in quite some time. This conference still is unparalleled!
I had a minute to play with the BlackBerry KeyOne and it feels like a super solid device. The screen is bigger then I thought it would be and this makes the device almost too big for my taste - but this is hard to say from playing with it for just a minute.
So iOS will finally support NDEF tags.
This talk is really interesting for anybody interested in mobile application security. This is not about mobile app reverse engineering but about app, backend, phone infrastructure interaction.
Detect NFC tags on iOS 11.0! pic.twitter.com/70szXo1yny— Aaron (@iosaaron) June 5, 2017
Some old PalmOS devices on street in my hood <3 pic.twitter.com/gkePP0Uzd8— Collin Mulliner (@collinrm) May 28, 2017
Papers and Slides from MOBILE SECURITY TECHNOLOGIES (MOST) 2017 an Academic Workshop
Android Security Bulletin - June 2017
LazyDroid - bash script to facilitate some aspects of an Android application assessment
factory and OTA images for Nexus devices
Android: Multiple Android devices do not revoke QSEE trustlets
Brazilian phishers are now asking for victim's IMEI in their fake bank pages, aiming to steal their accounts via mobile access
50+ iOS 11 Features Apple Didn't Announce On Stage [List]
Android Mazar 3.0 targets 41 banking apps
Google Publishes List of 42 Phones Running Latest Android Security Updates 42 is not a lot!
City-Wide IMSI-Catcher Detection
Up to $200,000 for Android exploits!
Mobile subscriber WiFi privacy (WiFi IMSI catcher!!) (paper)
Collection of the most common vulnerabilities found in iOS applications
Android O feature spotlight: Android tells you if an app is displaying a screen overlay
Priorities for Securing the Mobile Ecosystem (slides)
Cloak & Dagger Android Overlay attacks
Cloak & Dagger (slides)
Cloak & Dagger talk(youtube)
Honey, I Shrunk the Attack Surface Adventures in Android Security Hardening (slides)
With great speed comes great leakage - How processor performance is tied to side-channel leakage (slides)
Pwning the Nexus of Every Pixel (slides)
initroot: Bypassing Nexus 6 Secure Boot through Kernel Command-line Injection
Android Encryption Demystified
iPhone 7 and 7 Plus get a stable jailbreak on iOS 10.1.1 with extra_recipe+yaluX
The Shadow over Android (slides)
Apparently Google Play Store can now manage your app signing keys, and 'opt-in is permanent (via Nikolay Elenkov)
Hacking iOS Applications a detailed testing guide (doc)
Android malware that infected 3500 devices/day
iOS/macOS bugs slaughter list by P0's Ian Beer
Hacking the Samsung Galaxy S8 Irisscanner
Learning about Bluetooth protocols and reverse-engineering them.
A Simple Tool for Linux Kernel Audits
Google VS Root: Why SafetyNet is now standard for developers
Google Play can now restrict app distribution based on SafetyNet Attestation results, SoC vendor etc (via John Kozyrakis)
US Senate Adopts Signal, HTTPS A Year After Trying To Kill Encryption
Alarming Security Defects in SS7, the Global Cellular Network - and How to Fix Them
iOS Kernel utilities
Dutch Cops Bust Another PGP BlackBerry Company for Alleged Money Laundering
Multiple MediaTek vulnerabilities
Google Working on Fix for Android Permission Weakness
More Android phones than ever are covertly listening for inaudible sounds in ads
The Jiu-Jitsu of Detecting Frida
Thieves drain 2fa-protected bank accounts by abusing SS7 routing protocol
Over 100 CF-Auto-Roots were updated by ChainfireXDA
Android Security Bulletin - May 2017
de-obfuscate Android Ztorg obfuscated strings
Android Applications Reversing 101
A diagram of the Android Activity / Fragment lifecycle
Example of a powerful overlay attack executed by Android banker (video)
Identifying an Android Device - Available Identifiers
Diving Deeper into Android O
How To Put Any Android Smartphone Into Monitor Mode Using Custom Script Without bcmon
Android app analysis and feature extraction library
Introduction to Fridump
Here's How To Track The Smartphone Apps That Are Tracking You
AssetHook: A Redirector for Android Asset Files Using Old Dogs and Modern Tricks
Android Package Inspector - dynamic analysis with api hooks, start unexported activities and more. (Xposed Module)
The Mobile App Pentest cheat sheet was created to provide concise collection of high value information on specific mobile application penetration testing topics.
TruSpy: Cache Side-Channel Information Leakage from the Secure World on ARM Devices (paper)
Dirty COW and why lying is bad even if you are the Linux kernel
How to build and integrate OpenSSL into your Android NDK project
iOS DeviceCheck. Access per-device, per-developer data that your associated server can use in its business logic.
Changes to Trusted Certificate Authorities in Android Nougat
In November 2016 I wrote a post about the iOS WebView Auto Dialer bug specifically in the iOS Twitter and the iOS LinkedIn apps. Last weekend I finally had the time to retest those apps to see if the bug was fixed. Retests in December and January showed the bug was still present (as far as I remember). Both apps are fixed now!
Playing around with this a bit more I discovered a new security warning on iOS. There now seems to be a detection for the case where a website automatically tries to open a TEL URL. The dialog doesn't always appear but when it does you first have to click allow before being presented with the actual Call/Cancel dialog. Neat!
The conclusion seems to be that the bug was fixed and that they added a new detection and warning dialog. Good!