Vulnerabilities found in Signal, Google Duo, Facebook Messenger, and other messaging apps allowed attackers to listen in on users without their permission, security experts have warned.
"On January 29, 2019, a serious vulnerability was discovered in Group FaceTime which allowed an attacker to call a target and force the call to connect without user interaction from the target, allowing the attacker to listen to the target's surroundings without their knowledge or consent," Natalie Silvanovich, a security engineer at Google's Project Zero, wrote.
"The bug was remarkable in both its impact and mechanism. The ability to force a target device to transmit audio to an attacker device without gaining code execution was an unusual and possibly unprecedented impact of a vulnerability."
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