Zero-day vulnerability in Apple iOS

Out-of-bounds write

Not patched

According to security researchers this vulnerability is being actively exploited since January 2018.

Vulnerability details

Advisory: SB2020042245 - Remote code execution in Apple iOS

Vulnerable component: Apple iOS

CVE-ID:

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H/RL:U/RC:C

CWE-ID: CWE-787 - Out-of-bounds write

Description:

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing email in the iOS MobileMail. A remote attacker can send a specially crafted email message, trigger an out-of-bounds write and execute arbitrary code on the target system. No user interaction is required to execute arbitrary code.

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

External links:

https://blog.zecops.com/vulnerabilities/unassisted-ios-attacks-via-mobilemail-maild-in-the-wild/


About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.