Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Mobile

2/20/2020
04:30 PM
Connect Directly
Twitter
LinkedIn
RSS
E-Mail
50%
50%

Popular Mobile Document-Management Apps Put Data at Risk

Most iOS and Android apps that Cometdocs has published on Google and Apple app stores transmit entire documents - unencrypted.

Dozens of popular file management apps published by a popular operator of an online document management system do not encrypt file transfers to and from user devices, potentially exposing data.

Mobile security firm Wandera, which discovered the issue, described it as impacting 23 of 29 Cometdocs apps on Apple's App Store. Four of the remaining apps did not convert files as claimed, and the other two were not file conversion apps. A random sampling of 31 Android versions of the same apps that Cometdocs has published on Google's official Play store showed them to be leaking private files as well, Wandera said.

"The Cometdocs applications are transferring files without using encryption (via http), providing bad actors the opportunity to cache and retrieve the files," the security vendor said in a report Thursday. The lack of encryption also gives attackers on the same Wi-Fi network as the user an opportunity to access files as they are transmitted to and from Cometdocs servers.

"This is the first time I have seen entire documents sent across the network without strong encryption," says Michael Covington, vice president of product at Wandera. Bad actors and casual eavesdroppers need minimal effort to obtain entire documents being sent to the conversion service, he says. Though Wandera has not performed any random tests of other document management software, it is unlikely that many are leaking full documents like Cometdocs apps, Covington notes.

Thes apps are an example of the risks organizations face when they allow employees to use unmanaged mobile devices and non-vetted apps for work-related purposes. "When users introduce applications and personally-enabled IT setups into the workplace without understanding how they work, it can cause a lot of headaches for IT and security professionals," Covington says.

Wandera said it had notified Cometdocs three times between December 2019 and January 2020 about the issue but has so far not received a response. Cometdocs did not immediately respond to a Dark Reading request for comment.

Cometdocs bills itself as a provider of apps that allow mobile device users to convert PDF documents into Word, Excel, PowerPoint, AutoCAD, HTML, and other formats. The company claims that its apps can also be used to create PDF documents from a variety of other formats, including rarely used ones such as Publisher and XPS. 

Its services include storing documents in the cloud for users so the files can be accessed from anywhere. Cometdocs apps allow users to sign into Gmail, iCloud, DropBox, OneDrive, and other popular file-hosting services and fetch files from there. Or users can manually upload files to the service from their mobile devices.

Cometdocs claims that some 3 million people worldwide currently use its software. The company offers both a free and paid version of its document conversion service.

Covington says that Cometdocs apps appear to be widely used by employees in enterprise settings. "I was honestly surprised to see that Cometdocs is actively used by some of Wandera's largest enterprise customers," Covington notes. "In fact, our researchers first investigated these apps because we saw a data leak originating from one of our customer devices," he says.

One reason for the popularity of Cometdocs' apps could be that many businesses are not equipped with an IT-approved PDF-converter tool. So employees are likely simply going to Apple and Google's mobile app stores and installing something they can use to quickly convert files. "

They assume that such a simple piece of software shouldn’t introduce any risk," Covington says.

Related Content:

Check out The Edge, Dark Reading's new section for features, threat data, and in-depth perspectives. Today's featured story: "10 Tough Questions CEOs Are Asking CISOs."

Jai Vijayan is a seasoned technology reporter with over 20 years of experience in IT trade journalism. He was most recently a Senior Editor at Computerworld, where he covered information security and data privacy issues for the publication. Over the course of his 20-year ... View Full Bio

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
Malicious USB Drive Hides Behind Gift Card Lure
Dark Reading Staff 3/27/2020
How Attackers Could Use Azure Apps to Sneak into Microsoft 365
Kelly Sheridan, Staff Editor, Dark Reading,  3/24/2020
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Write a Caption, Win a Starbucks Card! Click Here
Latest Comment: This comment is waiting for review by our moderators.
Current Issue
6 Emerging Cyber Threats That Enterprises Face in 2020
This Tech Digest gives an in-depth look at six emerging cyber threats that enterprises could face in 2020. Download your copy today!
Flash Poll
State of Cybersecurity Incident Response
State of Cybersecurity Incident Response
Data breaches and regulations have forced organizations to pay closer attention to the security incident response function. However, security leaders may be overestimating their ability to detect and respond to security incidents. Read this report to find out more.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-10940
PUBLISHED: 2020-03-27
Local Privilege Escalation can occur in PHOENIX CONTACT PORTICO SERVER through 3.0.7 when installed to run as a service.
CVE-2020-10939
PUBLISHED: 2020-03-27
Insecure, default path permissions in PHOENIX CONTACT PC WORX SRT through 1.14 allow for local privilege escalation.
CVE-2020-6095
PUBLISHED: 2020-03-27
An exploitable denial of service vulnerability exists in the GstRTSPAuth functionality of GStreamer/gst-rtsp-server 1.14.5. A specially crafted RTSP setup request can cause a null pointer deference resulting in denial-of-service. An attacker can send a malicious packet to trigger this vulnerability.
CVE-2020-10817
PUBLISHED: 2020-03-27
The custom-searchable-data-entry-system (aka Custom Searchable Data Entry System) plugin through 1.7.1 for WordPress allows SQL Injection. NOTE: this product is discontinued.
CVE-2020-10952
PUBLISHED: 2020-03-27
GitLab EE/CE 8.11 through 12.9.1 allows blocked users to pull/push docker images.