Questions tagged [security]

For more generic questions relating security issues. For specific issues having their own tags, please use those -- e.g. 'malware', 'antivirus', 'privacy', 'lost-phone'. Please see the full tag wiki for more. For more in-depth Android security issues, you might rather want to visit our sister-site at http://security.stackexchange.com/questions/tagged/android

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how do I block an app. from ever installing in Android 12?

There is one notorious app. that gets installed every now and then. How do I stop it from happening in Android 12. Is there a way to block it from ever installing from google play store?
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Auto lock if Smart Stay can't see my eyes open

Sometimes, while in bed, I will watch a movie or YouTube on my Samsung Galaxy S20 ultra. Sometimes I fall asleep and the movie will continue to play as I sleep. I don't want my son wandering in the ...
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Can an Android app with device management and microphone permissions spy in background secretly?

As far as I know, since Android 12 an app needs to have a Foreground Service Worker (with an active permanent notification) to run in all the time without being stopped when no activity is in ...
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Can a school wifi certificate track me at home?

At my school, when logging into wifi for the first time, we enter our ID & password into a normal wifi login page, then we download a certificate. I cannot confirm if the certificate changes ...
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Should the layout of Android's "secure keyboard" be localized?

Some application use the "secure keyboard" of my ColorOS 12.1 (Android 12 customized by Oppo). While my device is configured to use German language, the keyboard displayed in such apps uses ...
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Auto factory reset - is this a general function of Android?

I want to install a software provided by my company but the IT admins only accept devices that support the "Auto factory reset" functionality (automatically perform a factory after if the ...
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Is it safe to give accessibility permission to an app?

So I use the app from Cleanbrowsing and gave the accessibility permission to it and saw that it can view my screen, action and inputs, perform actions and control the display. Is this app even safe to ...
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TPM (Trusted Platform Module) vs. TEE (Trusted Execution Environment) - can credentials be *stored* on both?

TPM is physically isolated from the rest of the system (i.e. it is a standalone chip on the mainboard), while TEE is a secure area of the main CPU. The key function of both TPM and TEE is to do ...
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FindMyDevice without having access to the device

This is a bizarre question to have to ask but: how am I supposed to use FindMyDevice if it requires my device to confirm it's me who's trying to find my device? I recently lost my phone (I luckily got ...
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I keep seeing a popup in Android: "Install now to control when your device updates" - is my phone compromised?

I am seeing this occasionally over more than one app (In this image, it is appearing over my calendar app). It appears without any prompting action on my part, which makes me suspicious. Furthermore, ...
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Increase number of fingerprint attempts

Is there any way to increase the number of allowed fingerprint attempts before PIN etc is demanded? I'm comfortable using adb shell if necessary.
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Accessing An Android Device With Broken Screen Via ADB and Unauthorized Machine in 2022

I've done a lot of experimentation on this, but can't seem to get anywhere. I'm looking for guidance on recovering data from my broken Android phone(s). It seems like this is going to require some ...
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Google activity showing things I didn't do

I have a Galaxy S10 Lite and I need some help because I really don't know what to do about this. I have looked up for a solution and can't find one anywhere. Since I got my phone last year I have had ...
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FBE securely wipe all data

According to android documentation the FBE system has two different levels. Credential Encrypted (CE) storage and Device Encrypted (DE) storage. Does a factory reset of an FBE phone reset the keys of ...
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Pixel 6a does not show available Android security updates

On a Pixel 6a device, Android seems to have trouble finding the latest security updates. On the one hand, it warns me under Settings->Security like this: (!) Update this device This device hasn't ...
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If I turned off the wireless display while my phone was still connected to my neighbor's TV, would it automatically disconnect from it?

I accidentally connected my phone to my neighbor's TV. I instantly turned off the wireless display, did my phone disconnect from his TV? If I turned on the wireless display again, will his TV ...
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HttpCanary target app uses a non system certificate

I'm looking for a way to bypass a target app using a non-system certificate. The HttpCanary app itself does give a 'solution' however it's incredibly unclear: Goto Settings->HttpCanary root CA ...
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Access request to account by com.eg.android.AlipayGphone.perf

The message below keeps popping up. Access request The following one or more apps request permission to access your account, now and in the future. Alipay com.eg.android.AlipayGphone.perf Do you ...
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How do you display a boarding pass without unlocking phone?

I found that on Apple you can definitely display a boardings pass without unlocking. For Android I found similar directions: load into Google Pay your boarding pass. But then when I click from locked ...
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1 answer
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How to make a phone locks automatically when seeing someone's face?

I just want to ask if is it possible to make my phone lock when it sees person A's face. It's reverse to unlocking my phone. It should work on all screens, whatever I'm doing, does that mean the ...
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is there a way to lock down an android phone to a specific IP range (i.e spotify IP addresses only)?

Is there a way to lock down an android phone to a specific IP range (i.e spotify IP addresses only)? We want our daughter to listen to spotify, but not access the internet in any other way. Right now, ...
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Is Galaxy S3 always disclosing an WiFi SSID? [duplicate]

I read tons of articles about how is it bad do hide SSID because client devices can disclose the network parameters by constantly "pinging" it when not in range. Ok, here is the client the ...
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38 votes
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What is Google up to? Google Play Store updating apps even though auto-update is disabled

Recently, I've noticed Google Play Store automatically "updating" apps, even when auto-updates are explicitly disabled. I put "updating" in quotes, because all the apps in question ...
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What to do if malware not gone after complete factory reset?

I have a virus in my Samsung galaxy s21a, and even after a complete factory reset phone doesn't recover. What would be other solutions to fix it?
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Does Android Lolipop 5.1 get encrypted by itself upon first boot?

My doubts are, Would an android device shipped with Lollipop 5.0 get encrypted itself upon first boot? I saw a lot of blogs saying Lolipop does not come with default encryption but in the official ...
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How to fix hijacked audio?

I probably got a virus in my Samsung Galaxy A21s and iPhone 7 because I receive modified audio when I try to listen to audio or video via social media such as YouTube or Facebook. It's some sort of ...
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Do Google & OEMs always have backdoors in Android devices?

In a helpful comment on this Android Stackexchange question, prominent contributor alecxs states: google and OEMs will always have own backdoors in propritary [sic] blobs for baseband/modem etc - you ...
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Take front/selfie photo if wrong password is input on the lock screen

Operating systems like iOS include the system that when another person tries to unlock your phone without your permission, it takes a photo of that person and warns you. Is it possible to have this on ...
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Can installed apps access data on android storage in background

Will it be possible for an app to read data in the background if it has media access permissions or even full storage access permission? Assumptions: Android 11 and above Media and file storage ...
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How to prevent network connectivity after a phone restart before the NetGuard firewall starts blocking apps' traffic?

There seems to be a major vulnerability in Android: even when using firewalls these aren't active immediately after a restart. The seconds before the firewall (NetGuard) starts can be used by apps ...
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BRATA (Brazilian RAT Android) - is there any action and treatment from it?

As far as is known, with this virus, the attacker, in addition to stopping antivirus programs, can also block the system menu while working with it by the user. The virus copies system data and then ...
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389 views

Weird files inside the root folder

I previewed (not downloaded) by mistake today a malicious pdf on Gmail app with Adobe Reader app, and I already inspected the phone for malware, uninstalled Adobe Reader app in case it was exploited, ...
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"Auto Update: Security" apk in downloads section

I found an apk called "Auto Update: Security" in the downloads folder of my phone. I wasn't able to access its details as every time I tried to do so the package installer would start, with ...
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Can Android 12 update trigger "new access" notification?

I recently got an e-mail warning that an app has been granted access from a nearby location, just after updating to Android 12. Device used was "app" not web browser. I changed password and ...
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Do keyboard apps which are enabled but not selected have access to input text?

I installed a keyboard app on Android 6 and when enabling it, the OS showed a warning that the keyboard app has access to input text. Since the warning appeared on enabling, not selecting, this ...
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How is an APK prevented from making security changes during their installation process

What if the APK installation ran a few scripts? Overwrote files outside it's designated folder? Edited a few files? etc? What would prevent it from doing so?
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Prevention of Android devices being hacked

I keep seeing media articles saying that smart phones etc are being hacked, particularly by NSO Pegasus. I would like to know how this is done. I'm particularly interested in how to protect against it....
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How to find hidden malware on Android?

Today, while watching a YouTube video on my Samsung Galaxy S20 FE 5G, the left half of the video portion was covered with a pinkish/orangish screen with the words "MICROWAVE SPY CAMERA 1.XXXX&...
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Can we get any data from fingerprint? [duplicate]

Is it possible to get a hash from a fingerprint reading such that it proves the identity of a user on my app and such that I can export the hash? By export I mean to put it on a document as proof of ...
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565 views

Disable "PIN required for additional security" prompt

I have a Pixel 4a, and I constantly have to re-enter the pin, even though it hasn't been more than 48/72 hours. My Pixel 4a currently has a pretty bulky case, making it unreasonable that the ...
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What info/data can a fresh installed app without permission gather?

If I just install an app BUT DON'T OPEN it, can it do/get something? Maybe during installation process, even if I didn't open it yet? If I didn't give the app any permission, what can it do/know? Can ...
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Can an app be installed AUTOMATICALLY and SILENTLY without popup/confirmation of install? How can this be possibile?

Is this behaviour doable? How? I have an app which keeps reinstalling. How can I track what is causing the installation? Are there any logs that I can check to see what is really causing this to ...
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There's this app that keeps installing automatically from Google Play Store

The app itself is a bank app. It's also a famous bank (Relax Banking by BCC).. The notification says installed from Play Store, and if I open Play Store and go to the page app, says in fact installed.....
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Are the Android app switcher/multitasking snapshots created when an app is sent to the background, encrypted?

This post here: https://android.stackexchange.com/a/218963/364009 outlines the snapshots location for the app switcher when an app is sent to the background, /data/system_ce/userid/snapshots, or at ...
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How to read html on my sdCard

A new tablet with Android 11. I have a collection of linked html pages; offline. There are quite a few and I would prefer to store these on my sdCard. Using file manager I click the index.html and it ...
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Update linking path

How do I add a new directory to linking path? Meaning add a directory to where the dynamic linker will look for shared libraries. In Ubuntu you can create a .conf file under /etc/ld.so.conf.d and ...
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334 views

Android hidden account

Is there any way to create hidden account in Android as it described in Cory Doctorow book "Little Brother"? When I enter pin code like 1234 this will open first account. When I enter 5678 ...
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Could anyone identify this crDroid ROM?

Found some third-party crDROID 7.11 build that works flawlessly on my phone, g530FZ. However, I couldn't find it listed on any credible sources (such as XDA). Anyone else used this rom or saw any ...
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Security concern: Can "multiple user" feature protect my sensitive data from apps that I don't trust? [duplicate]

I'm using lineageos18.1 and for some reason I need to install an app that I don't trust. It requires some critical permission to run normally such as: All files access Install unknown apps Get ...
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How is it possible to hack/steal the data of a stranger's Android phone by holding it by hand for a while?

Several years ago, I saw in my university a demonstration that someone wearing a special finger ring can transfer the data of a stranger's (Android) phone to somewhere without the owner of the phone ...
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