Facebook’s WhatsApp urged users to upgrade to the latest version of its popular messaging app following a report that users could be vulnerable to having malicious spyware installed on phones without their knowledge.
WhatsApp, one of the most popular messaging tools, is used by 1.5 billion people monthly and it has touted its high level of security and privacy, with messages on its platform being encrypted end to end, reports Reuters.
“WhatsApp encourages people to upgrade to the latest version of our app, as well as keep their mobile operating system up to date, to protect against potential targeted exploits designed to compromise information stored on mobile devices,” a spokesman said.
“We are constantly working alongside industry partners to provide the latest security enhancements to help protect our users,” he said. WhatsApp did not elaborate further.
According to media reports, a vulnerability in WhatsApp allowed attackers to inject spyware on phones by ringing up targets using the app’s phone call function.
It said the spyware was developed by Israeli cyber surveillance company NSO Group and affects both Android and iPhones. Sources said WhatsApp could not yet give an estimate for how many phone were targeted.
Teams of engineers had worked around the clock in San Francisco and London to close the vulnerability and it began rolling out a fix to its servers on Friday last week and issued a patch for customers on Monday.
Asked about the report, NSO said its technology is licensed to authorized government agencies “for the sole purpose of fighting crime and terror,” and that it does not operate the system itself while having a rigorous licensing and vetting process.
“We investigate any credible allegations of misuse and if necessary, we take action, including shutting down the system. Under no circumstances would NSO be involved in the operating or identifying of targets of its technology, which is solely operated by intelligence and law enforcement agencies,” the company said.
WhatsApp disclosed the issue to the US Department of Justice last week.
Social media giant Facebook bought WhatsApp in 2014 for $19 billion.
Facebook co-founder Chris Hughes last week wrote in The New York Times that fellow co-founder Mark Zuckerberg had far too much influence by controlling Facebook, Instagram and WhatsApp, three core communications platforms, and called for the company to be broken up.
Meanwhile, WhatsApp informed its lead regulator in the European Union, Ireland’s Data Protection Commissioner (DPC), of a serious security vulnerability on its platform, the DPC said on Tuesday.
“The DPC understands that the vulnerability may have enabled a malicious actor to install unauthorized software and gain access to personal data on devices which have WhatsApp installed,” the regulator said in a statement.
“WhatsApp are still investigating as to whether any WhatsApp EU user data has been affected as a result of this incident,” the DPC said, adding that WhatsApp informed it of the incident late on Monday.
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