Summary Points
- Malware on a Mac can exploit a hidden setting in Meta’s Muse app to redirect voice commands, turning it into a backdoor for malicious access.
- Attackers can steal user sessions, eavesdrop on dictation, inject commands, and remotely control the Muse assistant across devices.
- Without patches, users should restrict access, revoke permissions, and avoid voice input to mitigate the risk of exploitation.
Threat Overview, Attack Techniques, and Targets
A security researcher, Patrick Wardle, revealed a vulnerability in Meta’s Muse app for Mac. The flaw allows an attacker to secretly turn the AI assistant into a backdoor. The attack requires malware already running on the Mac. It targets users who have installed Muse and granted it access to personal data.
The method involves changing a hidden setting in the app. This setting controls where Muse sends the dictation data. The attacker can redirect this data to a server they control. When the user speaks, the audio and text are sent to a malicious program instead of Meta. From there, the attacker can read what the user dictated. They can also add commands that Muse trusts. It is even possible to steal the user’s session token, allowing control over the assistant on other devices.
The attack works because of a misconfiguration in Muse, not because of a remote break-in. Since the Mac’s security usually blocks apps from accessing others’ data, this flaw bypasses normal protections. The attacker’s commands appear to come from a legitimate app, which may hide malicious activity from security software.
Impact, Security Implications, and Remediation Guidance
This vulnerability could turn Muse into a powerful backdoor. Attackers can access files, emails, messages, and smart-home controls the user allows. They can also gather information such as the user’s location and nearby devices. Because the attack depends on malware already present on the Mac, it does not allow remote hacking.
The main security risk is that this flaw may go unnoticed. Common security tools might not detect the malicious commands, as they seem to originate from the trusted Muse app. Users are advised to avoid installing or using Muse until the issue is fixed. They should review and revoke unnecessary app permissions and disconnect compromised accounts. If there is suspicion of infection, changing passwords on connected accounts is recommended.
Since no patch has been released yet, Mac users should follow guidance from Meta or security authorities for updates. Preventive actions include quitting or removing Muse and avoiding voice input to reduce risk. More security guidance should be obtained from Meta or other relevant vendors to address this flaw properly.
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