iMessage Zero-Click Attacks Suspected in Targeting of High-Value Individuals

iMessage Zero-Click Attacks Suspected in Targeting of High-Value Individuals
Anomalous iPhone crashes linked to sophisticated zero-click exploits targeting a vulnerability called Nickname have been observed mainly in high-value individuals in the EU and US. These targeted attacks, associated with Chinese state-sponsored hackers, exploit iMessage vulnerabilities to potentially compromise devices without user interaction. #NickameVulnerability #ChineseHackers

Keypoints

  • The Nickname vulnerability affects iPhones up to iOS 18.1.1 but was fixed in iOS 18.3.1.
  • Six targeted devices showed signs of exploitation, with crashes linked to malicious nickname updates in iMessage.
  • The attack exploits a race condition in the β€˜imagent’ process, leading to use-after-free memory corruption.
  • The exploits are associated with Chinese state-sponsored threat actors targeting high-profile individuals.
  • Evidence includes modifications in message metadata and SMS directories following the crashes, indicating potential spyware activity.

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