Yandex.Mail 3.15 (Android / Google Play)

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This application is available for Android. This app is designed to connect all email accounts, calendars and files and so on into one spot via official app Yandex Mail with intergrated Yandex Disk. The latest build was released on June 6, 2017. Our latest check was performed on Oct 7th, 2016.

Findings Summary

Our examination revealed total 20 items, where were 8 DAR items and 12 DIT items found. Among DAR items were found 0 worst items, 8 bad items, 0 good items, and 0 best items. Among DIT items were found 0 worst items, 0 bad items, 12 good items, and 0 best items.

Below you find 2 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:

Take advantage of all Yandex.Mail features with your phone.
Send messages no matter where you are.
Get push notifications about new mail.
With the Yandex.Mail app you can:

  • send and receive messages with attachments;
  • use push notifications so you no longer have to check your mail manually;
  • search your messages;
  • group messages by subject;
  • filter messages by label, for example “Unread” or “Flagged”;
  • manage your Yandex.Mail for domain mailboxes.

 

Protection levels.

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

Locally stored data groups include Account Information, Application Information, Message Information, Address Book ‘n’ Contact Information.
The average DAR value is 3.50 points (7.00 points of system protection and 0.00 points of own protection). It equals to a typical value (3.5 points, where’s 7 points of system protection and 0 points of own protection).

Items 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.

– Credentials (IDs) (‘Account 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 info related to profiles, basic credential IDs like email or username or phone number plus some more info depends on applications,

– Credentials (Tokens) (‘Account 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 info related to profiles, basic credential IDs like email or username or phone number plus some more info depends on applications,

– Account Settings ‘n’ Configs (‘Application Information’ Group) – Information about your account settings and configurations. This data item related to mentioned group meant to be any info related to the app, app settings, including installed apps or installers,

– Application Configs (‘Application Information’ Group) – Different configuration files created by your app, perhaps app permissions. This data item related to mentioned group meant to be any info related to the app, app settings, including installed apps or installers,

– Application Events (‘Application Information’ Group) – App events referred to user actions ‘n’ activities were done. This data item related to mentioned group meant to be any info related to the app, app settings, including installed apps or installers,

– Attachments (‘Message Information’ Group) – Either Raw or encoded attachments files. This data item related to mentioned group meant to be all message, including SMS, MMS, social and IM messages with or without attachments,

– 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,

– Media Data (‘Address Book ‘n’ Contact Information’ Group) – Any info like images, audios, videos, media notes, etc. 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

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 Device Information, Application Information, Account Information, Message Information, Credentials Information.
The average DIT value is 5.63 points (6.00 points of system protection and 5.25 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 5.50 points (6 points of system protection, 5 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 – server-side limitations (SSL validation/pinning, limited access to outdated records) and client-side limitations (pinning with user-decision behavior, additionally ecnrypted/hashed data item, or own cert storage).

– Device Data (‘Device Information’ Group) – Device ID, Device Name, Device OS Name and Version, and jailbroken/root status. This data item related to mentioned group meant to be details about your device,

– Application Events (‘Application Information’ Group) – App events referred to user actions ‘n’ activities were done. This data item related to mentioned group meant to be any info related to the app, app settings, including installed apps or installers,

– 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,

– 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,

– 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 Short Profile (‘Message Information’ Group) – Name, Email ID, Phone number of contacts. This data item related to mentioned group meant to be all message, including SMS, MMS, social and IM messages with or without attachments,

– 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,

– Preview (‘Message Information’ Group) – Some pieces of info downloaded locally or to show only on display only like a preview of emails, social posts, documents, thumbnails, etc. This data item related to mentioned group meant to be all message, including SMS, MMS, social and IM messages with or without attachments,

– Media Data (‘Account Information’ Group) – Any info like images, audios, videos, media notes, 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

Items’ GROUP #2 with average value 6.00 points (6 points of system protection, 6 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 – SSL pinning (can be patched).

– 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 (Passwords) (‘Credentials Information’ Group) – Well-known passwords or PINs you’re using to get access to your account (usually it is worse than tokens because it gives 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.,

– 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.

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.

You may find privacy policy details proceeding the link above to compare developer’s vision on data protection with our results.