Menu
WhatsApp fixes dangerous flaw in Web app

WhatsApp fixes dangerous flaw in Web app

Malware could be delivered by changing a vCard's file extension

WhatsApp, the widely used messaging program, has fixed a dangerous flaw in its Web app that could be used to trick people into installing malware, according to Check Point.

The flaw could affect as many as 200 million people who use WhatsApp's web interface, wrote Oded Vanunu, Check Point's group manager for security research and penetration.

"All an attacker needed to do to exploit the vulnerability was to send a user a seemingly innocent vCard containing malicious code," he wrote.

The flaw was found by a Check Point researcher, Kasif Dekel. He found that the Web version of WhatsApp failed to properly filter electronic business cards in the vCard format.

Dekel found it was possible to change the file extension for a vCard to .bat, or a batch executable script. WhatsApp thinks a user is just receiving a vCard, but it's actually executable code.

"This means once the victim clicks the downloaded file (which he assumes is a contact card), the code inside the batch file runs on his computer," Dekel wrote.

An attacker just needs the victim's phone number to send the malicious code and for the recipient to accept it.

Check Point disclosed the flaw to WhatsApp on Aug. 21, and WhatApp released an update for Web clients on Aug. 27. The up-to-date version is v0.1.4481.

Check Point waited until Tuesday to publicly disclose the vulnerability.

Follow Us

Join the New Zealand Reseller News newsletter!

Error: Please check your email address.

Slideshows

IN PICTURES: Ingram Micro Innovation hits Auckland with Hewlett Packard Enterprise

IN PICTURES: Ingram Micro Innovation hits Auckland with Hewlett Packard Enterprise

Ingram Micro completed its nationwide roadshow in Auckland last month, kicking off its Innovation Hour series with Hewlett Packard Enterprise. Uncovering the latest in storage, networking and servers, the event outlined key market trends for resellers in 2016 and beyond.

IN PICTURES: Ingram Micro Innovation hits Auckland with Hewlett Packard Enterprise
IN PICTURES: FireEye celebrates channel at 2016 Partner Conference

IN PICTURES: FireEye celebrates channel at 2016 Partner Conference

FireEye welcomed 143 channel partners and distributors to FireEye's 2016 annual Partner Conference, FireEye A/NZ Momentum - held at Establishment in Sydney. Delegates heard from senior trans-Tasman channel leaders, marketing and the product divisions in the morning, with FireEye customers, incident responders and threat intelligence analysts sharing knowledge during the afternoon.

IN PICTURES: FireEye celebrates channel at 2016 Partner Conference
Show Comments