Security researchers working in Google’s Mission Zero crew say they’ve found plenty of hacked web sites which used previously undisclosed security flaws to indiscriminately attack any iPhone that visited them. As reported that the attack could be one of the largest ever performed in opposition to iPhone users. If a consumer visited one of many malicious web sites utilizing a vulnerable device, then their private information, messages, and real-time location information could be compromised. After reporting their findings to Apple, the iPhone manufacturer patched the vulnerabilities earlier this year.

As noted that the attack may have allowed the websites to install an implant with access to an iPhone’s keychain. This could have given the attackers access to any credentials or certificates contained within it, and will additionally enable them to access the databases of seemingly secure messaging apps like WhatsApp and iMessage. Regardless of these apps utilizing end-to-end encryption for the transfer of messages, if an end gadget was compromised by this attack, then an attacker might access previously encrypted messages in the understandable textual content.

The attack is notable due to how indiscriminate it is. The different attacks are usually more focused, with individual links being sent to targets. On this case, merely visiting a malicious web site might be sufficient to be attacked, and for an implant to be installed on a device. The researchers estimate that compromised websites have been visited by thousands of visitors every week.

The implant installed by the malicious websites could be deleted if a person rebooted their cellphone. Nevertheless, the researchers say that for a reason that attack compromises a device’s keychain, then the attackers might acquire access to any authentication tokens it contains, and these could be used to maintain access to accounts and services long after the implant has disappeared from a compromised device.

In whole, the researchers say they found 14 vulnerabilities throughout five completely different exploit chains, including one which was unpatched on the time the researchers discovered it. iOS versions 10 through 12 have been all affected by the vulnerabilities, which the researchers say signifies that the attackers have been trying to hack customers over at least two years.

The group says they contacted Apple to report the vulnerability back in February and gave the company only seven days to patch it. As per reports, this can be a far shorter deadline than the standard 90-day window often given by researchers, and sure displays how severe the vulnerabilities are. Apple patched the vulnerabilities with iOS 12.1.4, the same update that fastened a serious FaceTime security flaw.

Though the vulnerabilities have now been patched, the researchers noticed that there are prone to be more out there that they’re yet to find.