Go SMS Pro is leaking confidential messages, data of millions of users exposed
"Sensitive media of users can easily be accessed by anyone without any authentication or authorisation."
Popular messaging app Go SMS Pro is leaking sensitive media exchanged between users of the app, according to research by Trustwave. The vulnerable media of users include private voice messages, video messages, and photos. The development was first reported by TechCrunch who verified Trustwave’s research. TechCrunch found a person’s phone number, a screenshot of a bank transfer, an order confirmation including a home address, an arrest record, and explicit photos while viewing links shared through the Go SMS Pro app.
According to the report, Trustwave’s researchers discovered the flawed Go SMS Pro’s app in August and informed the app-maker to fix them. However, even after the standard 90-day deadline since August 18, 2020, to fix the issue, the app maker "has done nothing to fix the bug." After the deadline, the researchers posted about the app flaws in public.
Go SMS Pro is said to have 100 million downloads on Google PlayStore and was discovered to publicly expose media transferred between users of the app.
As per reports, users who do not have the app received URLs via SMS if any messages were sent to them using the app. Users had to click on this URL to access the message that would open on a browser. According to research by Spider Labs, anybody without any authentication or authorization, who had access to the URL could open it and get access to sensitive media shared between users.
The research further stated that the URL link was sequential (hexadecimal) and predictable and that while sharing media files, a link was generated regardless of the recipient having the app or not.
"As a result, a malicious user could potentially access any media files sent via this service and also any that are sent in the future. This obviously impacts the confidentiality of media content sent via this application," notes the research. The research further warns users to avoid sending private media files that may contain sensitive data till the vendor acknowledges and fixes the vulnerability.
"An attacker can create scripts that could throw a wide net across all the media files stored in the cloud instance," Karl Sigler, senior security research manager at Trustwave told TechCrunch.
Source: indiatoday
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