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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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19 views

Android asks to re-enter WiFi passwords. Is my phone compromised?

I have a Galaxy S8 (SM-950F) with Android version 8.0.0. I have rooted the device with Magisk. I have a couple of Magisk modules, including Bixby remapper, F-Droid Privilaged Extension, liboemcrypto ...
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19 views

How to disable android on localhost folder

When I connect my android phone to wifi, using a desktop PC connected to the same wifi I can see a list of folder that belongs to my android phone called android on localhost (as shown in the ...
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0answers
31 views

Marshmallow: Adding system-wide custom root certificate

On Android 6 if I move my own root CA from /data/misc/user/0/cacerts-added to /system/etc/security/cacerts/ it doesn't work anymore. It is in the system list and active, but my browser says ...
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1answer
26 views

“Device Admin” apps are asking for permission to erase my data after failed login attempts! How can I confirm?

I was about to install the Outlook app on my phone, when it asked me to activate it as a device admin. (See image below): I'm sure few people read the whole warning. One part greatly concerned me: ...
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0answers
33 views

Forgot Android Phone Password and Security Questions [closed]

I am forgotten my old android phone password and security questions. How to recover my mobile password?
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1answer
38 views

Chrome - unprompted auto-download of files after opening the browser - bug or something else?

Upon opening google chrome on android, it suddenly downloaded (unprompted by me) a jpeg, as well as a "seed" file. After scanning both files with the mobile version of kaspersky, i opened the jpeg ...
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2answers
38 views

Security question incoming calls

I've got an Nokia 6 with Pie! How do I stop others from answering my calls, or more correct, how do I stop incoming calls from opening my phone?? Everytime there's an incoming call, all security ...
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1answer
28 views

Revoking Bluetooth permission from all apps?

I noticed that my phone silently enables bluetooth when screen turns off. When phones remains inactive for few minutes and I click unlock button I can see bluetooth indicator showing up for around 1-2 ...
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2answers
28 views

How do I safely flash a new rom on an infected android phone? [duplicate]

Is using a live cd a good idea? Will it keep the rest of my computer including storage and installed OS safe?
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0answers
13 views

Link between device state & user settable root of trust

I am (still) trying to understand exactly how verified boot works and I am wondering what happens when a user-settable root of trust is used by the device. As said here: If the device is LOCKED, ...
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0answers
8 views

Openkeychain create public key problems

1 How can i find my public key in openkeychain? I can only find my private key 2 i need to create gpg how to do that? I now have downloaded k9mail. I cant inport the key from openkeychaine ...
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1answer
32 views

How to delete my personal files retained by an app?

I'm using Android Excel and Word apps on a non-rooted Galaxy Note 8. Over the past months I've opened a couple of files from external sources (email and SD card), but was shocked to find these files ...
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2answers
69 views

Can my father's smartphone be compromised?

My father said to me that he allowed installation of apps from unknown sources when he was asked to do it to go further with something (he said that he don't remember when or what he was doing). In ...
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1answer
29 views

Mobile Hotspot Security On Older Phones

I want to use my Samsung Galaxy Trend Plus as a mobile hotspot, for my laptop. I have installed a custom rom on the phone -- Official Lineage OS 14.1. There are no security updates for this OS. Does ...
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0answers
25 views

Erase data on UFS device securely

I want to erase some files on UFS device securely, which can't be recovered with any known methods. The operating system is Android and it boots from the same UFS device. Is that possible to do that ...
2
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1answer
47 views

Why is there “/proc/net/snmp” file on my device? Could it be due to a malware?

After reading this paper I observed a little and I realized that an SNMP socket (exactly two: v4 and v6) exists when I use ls /proc/1/net. I see them clearly. My question is simple, do the bootkits ...
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2answers
145 views

List of system apps, remove unwanted app [WELCOME P20 Pro]

I bought a low-budget china no-brand phone brand: 'WELCOME' model: 'P20 Pro' , and some things seem a little odd. Before using the phone, I did a factory reset. When I first turned it on before the ...
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0answers
48 views

Android verified boot and custom ROMs

I'm trying to figure out how exactly works the Android Verified Boot process and its usage with custom ROMs. The documentation I found on it is unclear (or outdated) as there seems to be several ways ...
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0answers
18 views

Can I use DNS-over-TLS below Android Pie?

Unfortunately DoT isn't part of Android below version 9. Is there a workaround app or should I better install LineageOS 16 on my old smartphone device?
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1answer
34 views

Is Android Pie vulnerable to ADB server attack?

According to The Hacker News, many Android devices are running insecure remote ADB service: Thousands of Android Devices Running Insecure Remote ADB Service Despite warnings about the threat ...
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0answers
55 views

Android Pie background apps

Android Pie does not allow background apps to have access to microphone or Camera. Is this valid in case of screenshot also? Does the app needs to be foreground and visible for any of the above ...
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0answers
75 views

Samsung Galaxy s10e requires password every few days, is it possible to disable safely?

Galaxy s10e, protected by a very long password and fingerprints. I specifically went for a very long password intending to only type it in after restarting the phone. In fact, the phone requires ...
0
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0answers
75 views

Allow android chrome to load unsafe scripts

When any site has mixed content (HTTPS + HTTP), and when you try to open HTTP content, on Desktop chrome, it shows a "shield" icon like screen below, This allow user to load unsafe script. However, ...
0
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1answer
28 views

Is it possible to access Face ID sensors raw data?

My Honor 10 has facial recognition capability in the dark, I suppose it works like Apple's Face ID which would rely on and IR camera and an Infrared pattern/dot projector. So, since the Settings app ...
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0answers
32 views

Can Google see what you're doing on a different device if you're using an Android phone's hotspot to connect a different device to the internet?

I know that Verizon or ATT or whatever data service you're using can see your browsing history since they're providing the service, but would Google be able to see it too since it's the software the ...
0
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1answer
23 views

How to know whether TrustyOS is running in Android mobile or not

I'm referring TEE(Trusted Execution Environment) for Android Here. Can anybody help me to check whether any device is runnning Android along with Trusty OS?
4
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1answer
114 views

For basic users - Any reason to install mobile security App?

For users that play it straight, never going to doubted sites, never enabling APK from non-play sources... (e.g typical seniors) Any reason to install a mobile security app? Because Such users ...
5
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1answer
67 views

If an apk requires no permission, can I be completely sure that it is safe to install?

I have an apk that requires no permissions whatsoever. Given that the apk requires no permissions, can I be completely sure that it is safe to install? Or are there still ways in which this apk might ...
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1answer
33 views

How to permanently erase the deleted files from Nexus 6p?

I had deleted several files like from my Nexus 6P, I want to permanently erase all deleted files, how to do it? where are the deleted files stored?
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0answers
5 views

Frp google bhpass for asus zen pad z8 [duplicate]

How can I get past Google verification on my Zen Aqpad z8. I don't know last synced account ?
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1answer
91 views

Apps whitelisted in AFWall+ without my knowledge

I've installed a firewall (AFWall+) on my phone, and I've manually whitelisted every app I wanted to allow accessing the Internet, including system apps. So everything is blocked by default, and I add ...
1
vote
0answers
24 views

How to prevent external USB HID devices enable without confirmation

Android support USB HID devices like keyboard and mouse. If you have a USB-C keyboard, or connect via a USB hub. The USB keyboard will have control to the system, without on-screen confirmation. I ...
1
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0answers
22 views

Are multiple-users protected from each other differently than apps?

I confess that I come from the happy world of unix computers, and am used to the concept of user accounts and hence group gids and userids uids. For the occasional usage of an untrusted app (i.e. ...
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1answer
31 views

Firefox wants to record video/audio

I have an Xperia Z5, running 7.1.1. When I browse the web using Firefox, I keep getting requests from Firefox to record audio and take photos/videos. Both requests always happen together, in that ...
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0answers
18 views

SD card not encrypted

I have an android device lg v30 and recently I purchased an sdcard for it. Naturally, I enabled encryption on the sd card (full encryption). Encryption completed successfully. I used the card for ...
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0answers
46 views

How do I check if my Android SD is encrypted?

I can't remember if I encrypted it already or not. How do I verify that? Under SETTINGS - SECURITY - ENCRYPTION, there is just "Encrypted phone", but nothing related to the SD card. The SD is NOT ...
2
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1answer
731 views

Is there anything malicious with play support libraries?

I was doing my daily stuff on my Android Nougat. And then something started downloading, play support libraries. I think OK right. But the moment downloading stopped, and installation started my ...
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0answers
488 views

How to Decrypt Huawei Safe File?

I am using Huawei Nova 3i and I have forgotten my password for File Safebox. But here I can see all my files encrypted. It would be great if I can decrypt them so that I can get back all my files. ...
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0answers
103 views

Hacked. How to factory reset no access factory reset

My phone and tablet has been hacked. Neither Samsung device is rooted. I think the rom has been changed and I am on a virtual network in a shell and unable to access factory reset. I don't know if the ...
0
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1answer
32 views

Files stealing from device or onedrive

I have word files on onedrive and i use word for android to edit theme. I want to know if the are secure. Can other applications acces themes ? Can appliaction that have storage permession steall my ...
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0answers
40 views

Apps still using Webview instead of Custom tabs?

What I have read from oauth spec is that the authorization server url should be visible to the user. From RFC6819 - OAuth 2.0 Security, it is stated that: A malicious application could attempt to ...
2
votes
1answer
56 views

Why reading permission to /proc/1/maps is denied and why doesn't the denial appear in logcat?

I'm developing a native app for Android, and I'm occasionally confronted with permission denied which doesn't trigger a log in the logcat logs. For example, trying to run: shell@kltevzw:/ $ cat /proc/...
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0answers
25 views

Are there apps which block apps from using features even when they're given permission?

Android's prefs lets me give or revoke individual permissions for individual apps. But sometimes an app will refuse to run without being given permissions that don't seem relevant for such an app. ...
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1answer
27 views

Setup Android for kids?

How to setup Android so that the phone app is completely usable without a pin, but all others apps need unlocking
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0answers
33 views

Service Tests - Security - what do the settings mean?

I have been shown how to use a code in the dialer to access the Testing menu on my Sony Xperia. I believe that checking the settings in Service Tests/Security can reveal whether the phone has been ...
6
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3answers
158 views

How to find out stolen phone of android by using IMEI number?

I have already tried by finding findDeviceWebsite Is there any way to find device by IMEI number?
3
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0answers
55 views

FBE - Why does each user get a separate DE key

I've been reading about how File-Based Encryption and Direct Boot work. There's one thing I don't understand. According to https://developer.android.com/training/articles/direct-boot Device ...
0
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0answers
43 views

Running an Android app in an encrypted container

Is there a way to encrypt apps (and appdata) on an Android device. I use an Android 7.1 device and don't want that there is any APP or especially Malware which can spy on appdata like my WhatsApp data....
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0answers
30 views

How do I verify my second-hand phone is 'clean'

I have just bought a second-hand Android phone (Samsung) and would like to check that there's nothing nasty on there before I start using it in earnest. It's my first smartphone! I have some ...
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2answers
94 views

Malicious software runs on the background of Android phone, but I cannot see it - how to find and remove it?

I know that a malicious malware/spyware has been installed on my Samsung Galaxy S3 phone and I constantly get the message to close apps not in use because they drain my battery. But I do not have ...