Risk
2/8/2012
01:25 PM
50%
50%

iOS Social Apps Leak Contact Data

Some apps send iPhone address books in unencrypted format to software vendors' servers--a practice that may not be obvious to all users.

10 Top iOS 5 Apps
10 Top iOS 5 Apps
(click image for larger view and for slideshow)
Are your iOS applications sharing your personal information with software vendors?

Wednesday, Arun Thampi, a Ruby and iOS developer, said that he'd discovered that a favorite iOS app, Path--billed by its developer as "the smart journal that helps you share life with the ones you love"--was sending an unencrypted copy of his iPhone address book to Path's servers.

"I'm not insinuating that Path is doing something nefarious with my address book, but I feel quite violated that my address book is being held remotely on a third-party service," said Thampi in a blog post. "I love Path as an iOS app and I think there are some brilliant people working on it, but this seems a little creepy."

The same day, Dave Morin, Path's CEO, responded to Thampi by commenting on his blog post. "We actually think this is an important conversation and take this very seriously," said Morin. "We upload the address book to our servers in order to help the user find and connect to their friends and family on Path quickly and [efficiently] as well as to notify them when friends and family join Path. Nothing more."

Furthermore, said Morin, Path recently made such sharing "opt-in" for the Android version of its client, and said that it would do the same beginning with the 2.0.6 version of its iOS software, which is waiting for App Store approval from Apple.

[ Google researcher argues that social media actually enhances personal privacy. Read more at Google Study: Social Media Enhances Privacy. ]

Inspired by Thampi's post, iOS developer Mark Chang posted to his "more of the same" blog that he'd found similar behavior on the part of another iOS social app, Hipster, which is billed by its developer as "a fun way to share where you are and what you're doing."

"I looked at the apps on my own iPhone for information leakage by other apps," Chang said. "I figured this would be common practice, and lo and behold, when booting up Hipster, it seems like parts of my iPhone address book were being uploaded to Hipster."

In a comment added to Chang's post, meanwhile, "nitrofox" reported that a photo app with social capabilities, Instagram, demonstrated similar behavior. Although as another poster commented, this behavior is noted in the app's FAQ, which states that allowing the app to "find friends" then uploads all contacts "via a secure connection in order to locate your contacts' accounts on Instagram." The FAQ also said, "We currently do not store this information."

According to Chester Wisniewski, a senior security advisor at Sophos Canada, multiple iOS apps are clearly failing to detail exactly what they're doing, and he criticized Morin at Path in particular for pursuing a "have-all-of-your-contact-info-first-and-ask-permission-second" strategy.

The problem is furthermore compounded because, unlike Android, the permission system built into iOS devices "doesn't provide notification of what information an app may be sending to its keepers, aside from location information," said Wisniewski in a blog post. "Where was Apple when the original app was released? The lengthy approval process should be looking out for its customers, not just whether it allows you to tether."

We aren't suggesting these companies are going to use this information against your interests, but should they be collecting this information without your knowledge?" Wisniewski continued. "Additionally, insecurely transporting personal information from your phone book, permission or not, is an unacceptable practice."

Social media are generating tons of data, but that data only becomes truly valuable when examined in context. Attend the virtual Enterprise 2.0 event Social Analytics: The Bridge To Business Value, and learn how social analytics will provide the bridge to unlocking business value. It happens Feb. 16.

Comment  | 
Print  | 
More Insights
Register for Dark Reading Newsletters
White Papers
Cartoon
Current Issue
Dark Reading Tech Digest, Dec. 19, 2014
Software-defined networking can be a net plus for security. The key: Work with the network team to implement gradually, test as you go, and take the opportunity to overhaul your security strategy.
Flash Poll
Video
Slideshows
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2014-9676
Published: 2015-02-27
The seg_write_packet function in libavformat/segment.c in ffmpeg 2.1.4 and earlier does not free the correct memory location, which allows remote attackers to cause a denial of service ("invalid memory handler") and possibly execute arbitrary code via a crafted video that triggers a use after free.

CVE-2014-9682
Published: 2015-02-27
The dns-sync module before 0.1.1 for node.js allows context-dependent attackers to execute arbitrary commands via shell metacharacters in the first argument to the resolve API function.

CVE-2015-0655
Published: 2015-02-27
Cross-site scripting (XSS) vulnerability in Unified Web Interaction Manager in Cisco Unified Web and E-Mail Interaction Manager allows remote attackers to inject arbitrary web script or HTML via vectors related to a POST request, aka Bug ID CSCus74184.

CVE-2015-0884
Published: 2015-02-27
Unquoted Windows search path vulnerability in Toshiba Bluetooth Stack for Windows before 9.10.32(T) and Service Station before 2.2.14 allows local users to gain privileges via a Trojan horse application with a name composed of an initial substring of a path that contains a space character.

CVE-2015-0885
Published: 2015-02-27
checkpw 1.02 and earlier allows remote attackers to cause a denial of service (infinite loop) via a -- (dash dash) in a username.

Dark Reading Radio
Archived Dark Reading Radio
How can security professionals better engage with their peers, both in person and online? In this Dark Reading Radio show, we will talk to leaders at some of the security industry’s professional organizations about how security pros can get more involved – with their colleagues in the same industry, with their peers in other industries, and with the IT security community as a whole.