Zero-day vulnerability in Apple iOS

Buffer overflow
CVE-2021-30807

Vulnerability details

Advisory: SB2021072626 - Privilege escalation in Apple iOS and iPadOS

Vulnerable component: Apple iOS

CVE-ID: CVE-2021-30807

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

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Description:

The vulnerability allows a local application to escalate privileges on the system.

The vulnerability exists due to a boundary within the IOMobileFrameBuffer subsystem. A local application can trigger memory corruption and execute arbitrary code on the target system with kernel privileges.

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

External links:

https://support.apple.com/en-us/HT212623

https://support.apple.com/en-us/HT212622