Zero-day vulnerability in Apple iOS

Use-after-free
CVE-2021-30762

Vulnerability details

Advisory: SB2021061430 - Multiple vulnerabilities in Apple iOS 12

Vulnerable component: Apple iOS

CVE-ID: CVE-2021-30762

CVSSv3 score: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-416 - Use After Free

Description:

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing HTML content within the WebKit component in Apple iOS. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger a use-after-free error and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note, the vulnerability is being actively exploited in the wild.

External links:

https://support.apple.com/en-us/HT212548