Viber Messenger (Android / Google Play)

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This application is available for Android. >>>> SHORT DESCRIPTION <<<<<. The latest build was released on June 28, 2017. Our latest check was performed on May 17th, 2017

Findings Summary

Our examination revealed total 27 items, where were 10 DAR items and 17 DIT items found. Among DAR items were found 0 worst items, 9 bad items, 0 good items, and 1 best item. Among DIT items were found 1 worst item, 0 bad items, 16 good items, and 0 best items.

Below you find 4 infographics summarizing what we described above. Each image provides information about both DAR and DIT items.

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Everything presented below is related to well-known CWEs, such as Sensitive data leakage [CWE-200], Unsafe sensitive data storage [CWE-312], Unsafe sensitive data transmission [CWE-319]. You can read more about it here.

Now let’s go deeper and examine each data item’s protection level.

Application Description

Let’s cite the description of this application below:

Viber Free Messenger and Phone Calls: Connecting millions worldwide! Write a text message, call, chat and share with anyone, anywhere!
Viber is your go-to free messenger, allowing you to message or call anyone in the world through your Internet connection*. Send a text message to friends and family with Viber Messenger. Call your loved ones using Viber’s live video chat or voice call, all part of Viber’s free and high-quality phone calls. Express yourself with cool stickers and emoji icons, share photos, and send your favorite videos. The free messenger also lets you make international phone calls for free.
Connect with friends and family using instant messaging, voice calls, or live video chats.
Choose a contact from your phone book or simply enter a phone number to add a new contact on Viber messenger. Send a text message, or take advantage of the other amazing features that Viber offers beyond just free messages! Share photos and videos, enjoy emoji icons and cool stickers, record audio messages, and even send files.
Group chat with up to 250 people!
With Viber messenger, it’s easy to create and join group chats – with up to 250 people at once! Chat with your favorite people, ‘like’ any user’s voice, or text message.
Why users worldwide are choosing Viber Free Messenger:

  • HaSSLe-free, long-distance calls- Viber Messenger is your free international calling app! No need for a username or login information, simply activate by entering your phone number.
  • Voice or video – Make your free phone call now! – Choose between the basic voice call or go with our live video chat if you need a face-to-face! Whether you make a phone call domestically or have international calls to make, all phone calls boast HD quality sound.
  • Instant video messages – Tap and hold the instant video icon to capture the moment with 30-second videos, release to send.
  • Secured communications – Viber messenger automatically encrypts text messages, video and voice calls, photos, videos, and group chats.
  • Express yourself with stickers – Bring your text message to life by sending playful emoji icons and cool stickers.
  • Your personal messenger with “damage control” – Delete a text message or voice message even after it was sent.
  • ‘Hidden Chats’ feature – Choose to hide specific chats from your messaging screen and access them later.

Install Viber Free Messenger Now – Start Connecting!
Facebook – http://facebook.com/viber
Twitter – http://twitter.com/viber
(*) Wi-Fi or data plan – network data charges may apply.
Viber is part of the Rakuten Group, a world leader in e-commerce and financial services.

Protection levels.

Locally stored data (Data-at-Rest, DAR).

Locally stored data groups include Media Information, Location ‘n’ Maps Information, Documents Information, Address Book ‘n’ Contact Information, Account Information, Call Information, Message Information.
The average DAR value is 3.85 points (7.00 points of system protection and 0.70 points of own protection). It is higher than a typical value (3.5 points, where’s 7 points of system protection and 0 points of own protection).

Items’ GROUP #1 with average value 3.50 points (7 points of system protection, 0 points of own protection) means data protection levels have following definitions. Frankly talking, extra data found that shouldn’t be accessed where system protection level means – root/jailbreak is required but not possible without wiping device data, and own protection level means – stored as is.

– Notes (‘Media Information’ Group) – Different notes stored locally or sync with server including all notes/tasks details. This data item related to mentioned group meant to be any data like photo, image, video, audio,

– GEO Snapshots (‘Location ‘n’ Maps Information’ Group) – Image-based snapshots of geodata info referred to the places. This data item related to mentioned group meant to be any geodata from trackers, social networks, GPS, etc.,

– GEO Data (‘Documents Information’ Group) – Any GEO info stored as plain text referred to the places or tracked activity. This data item related to mentioned group meant to be any documents stored locally, uploaded, downloaded, synchronized in any file format,

– Media Data (‘Media Information’ Group) – Any info like images, audios, videos, media notes, etc. This data item related to mentioned group meant to be any data like photo, image, video, audio,

– Account Media (‘Address Book ‘n’ Contact Information’ Group) – Full or reduced image of account. This data item related to mentioned group meant to be info locally stored, cached or transferred over the network and belong to this application if it’s social even,

– Account Data (‘Account Information’ Group) – Basic info about account like name, a list of sub-account (e.g. financial or other) and some linked data like a phone number. This data item related to mentioned group meant to be any info related to profiles, basic credential IDs like email or username or phone number plus some more info depends on applications,

– Media URLs (‘Account Information’ Group) – URLs related to media info such as stream media or profile’s media, etc. This data item related to mentioned group meant to be any info related to profiles, basic credential IDs like email or username or phone number plus some more info depends on applications,

– Contact Short Profile (‘Address Book ‘n’ Contact Information’ Group) – Name, Email ID, Phone number of contacts. This data item related to mentioned group meant to be info locally stored, cached or transferred over the network and belong to this application if it’s social even,

– Messages (‘Message Information’ Group) – Different types of messages, conversations, except for SMS, MMS but including recipient and sender IDs and attachments. This data item related to mentioned group meant to be all message, including SMS, MMS, social and IM messages with or without attachments

Items’ GROUP #2 with average value 7.00 points (7 points of system protection, 7 points of own protection) means data protection levels have following definitions. Frankly talking, compliance but there are publicly known techniques to access the data including forensics one where system protection level means – root/jailbreak is required but not possible without wiping device data, and own protection level means – data stored in system protected place like keychain (no additional protection still).

– Encryption Key (‘Call Information’ Group) – Encryption key found in app data folders, traffic or code of app used to protect your data. This data item related to mentioned group meant to be any call info stored, cached or transferred in plain text or media files

Keep in mind if you’re using some Android devices such Samsung, LG or another device with an unlocked or non-locked loader that allow rooting your device without user action, the system level equals 6 points instead of 7. It means your data can be stolen without involving your actions.

Transferred data (Data-in-Transit, DIT).

Transferred data groups include Message Information, Location ‘n’ Maps Information, Credentials Information, Address Book ‘n’ Contact Information, Call Information, Account Information, Media Information.
The average DIT value is 5.82 points (5.71 point of system protection and 5.94 points of own protection). It is higher than a typical value (4 points, where’s 4 points of system protection and 4 points of own protection).

Items’ GROUP #1 with average value 5.00 points (6 points of system protection, 4 points of own protection) means data protection levels have following definitions. Frankly talking, data is not available all the time or partially accessed where system protection level means – MITM prevented or fake certificate importing prevented, but plaintext non-protected traffic is intercepted, and own protection level means – bypassed by fake/stolen root certificates.

– Media Data (‘Message Information’ Group) – Any info like images, audios, videos, media notes, etc. This data item related to mentioned group meant to be all message, including SMS, MMS, social and IM messages with or without attachments,

– Contact Media (‘Message Information’ Group) – Full or reduced image of contact. This data item related to mentioned group meant to be all message, including SMS, MMS, social and IM messages with or without attachments,

– GEO Data (‘Location ‘n’ Maps Information’ Group) – Any GEO info stored as plain text referred to the places or tracked activity. This data item related to mentioned group meant to be any geodata from trackers, social networks, GPS, etc.,

– Address Data (‘Location ‘n’ Maps Information’ Group) – Home, work or another type of owner address stored by apps. This data item related to mentioned group meant to be any geodata from trackers, social networks, GPS, etc.

Items’ GROUP #2 with average value 1.00 points (1 point of system protection, 1 point of own protection) means data protection levels have following definitions. Frankly talking, plaintext data is encoded but still ‘as is’ and easily accessed where system protection level means – compressed or encoded by known algorithm (zlib, zip, b64, etc.), and own protection level means – compressed or encoded by known algorithm (zlib, zip, b64, etc.).

– GEO Snapshots (‘Location ‘n’ Maps Information’ Group) – Image-based snapshots of geodata info referred to the places. This data item related to mentioned group meant to be any geodata from trackers, social networks, GPS, etc.

Items’ GROUP #3 with average value 6.50 points (6 points of system protection, 7 points of own protection) means data protection levels have following definitions. Frankly talking, protection and privacy issues are still possible but might involve interaction with an app code where system protection level means – MITM prevented or fake certificate importing prevented, but plaintext non-protected traffic is intercepted, and own protection level means – tricks to bypass sniffing (hardly to be or can’t be patched to bypass), including non-common or unsupported protocols.

– Credentials (IDs) (‘Credentials Information’ Group) – Only account IDs like app or 3rd party user IDs including emails, phone number, usernames, etc. (depends on apps). This data item related to mentioned group meant to be any types of credentials including basic (IDs only), passwords, tokens, etc.,

– Credentials (Activation IDs) (‘Credentials Information’ Group) – Two-factor activation code received in messages. This data item related to mentioned group meant to be any types of credentials including basic (IDs only), passwords, tokens, etc.,

– Credentials (Tokens) (‘Credentials Information’ Group) – Different tokens used to get access to your account, except for passwords but including app or 3rd party tokens, secret keys, etc. (usually give full access to your account). This data item related to mentioned group meant to be any types of credentials including basic (IDs only), passwords, tokens, etc.,

– Contact Profile (‘Address Book ‘n’ Contact Information’ Group) – Full info about contacts including name email id, phone numbers, gender, linked accounts, geodata, stream and social activity. This data item related to mentioned group meant to be info locally stored, cached or transferred over the network and belong to this application if it’s social even,

– Contact vCard (‘Message Information’ Group) – Contact Profile info stored as vCard. This data item related to mentioned group meant to be all message, including SMS, MMS, social and IM messages with or without attachments,

– Messages (‘Message Information’ Group) – Different types of messages, conversations, except for SMS, MMS but including recipient and sender IDs and attachments. This data item related to mentioned group meant to be all message, including SMS, MMS, social and IM messages with or without attachments,

– Call Stream (‘Call Information’ Group) – Audio or Video call streaming between two or more users. This data item related to mentioned group meant to be any call info stored, cached or transferred in plain text or media files,

– Call Details (‘Call Information’ Group) – Full info about calls you made like phone number, name, date and time, duration, type of call (missed, placed, outgoing, etc.), profile, and stream (other phone numbers, messages preview, social news). This data item related to mentioned group meant to be any call info stored, cached or transferred in plain text or media files,

– Call History (‘Call Information’ Group) – Some info about calls you made like phone number, name, date and time, and type of call (missed, placed, outgoing, etc.). This data item related to mentioned group meant to be any call info stored, cached or transferred in plain text or media files,

– Account Details (‘Account Information’ Group) – Full info about your account including account membership, expiration, profile, linked data and account, etc. This data item related to mentioned group meant to be any info related to profiles, basic credential IDs like email or username or phone number plus some more info depends on applications,

– Place Details (‘Location ‘n’ Maps Information’ Group) – Any info about public place (city, country, address, contacts) stored in text or media file format. This data item related to mentioned group meant to be any geodata from trackers, social networks, GPS, etc.,

– Notes (‘Media Information’ Group) – Different notes stored locally or sync with server including all notes/tasks details. This data item related to mentioned group meant to be any data like photo, image, video, audio

Keep in mind if you’re using out-of-date Android < 7.0, the system level equals 4 points instead of 6. It means your data can be stolen with a crafted preinstalled certificate on the device or if someone makes you install a certificate. Also, if you’re using out-of-date Android < 5.0, the system level equals 2 points instead of 4. It means your data can be stolen without involving your actions.

Privacy Policy

Full application privacy policy is available here.