CVE-2020-27918 Use after free in iOS and iPadOS
Attackers can execute arbitrary code by tricking users into visiting malicious web content on Apple devices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-27918?
CVE-2020-27918 is a high-severity use after free vulnerability in Apple Icloud, published on 8 Dec 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A use after free issue was addressed with improved memory management. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 14.2 and iPadOS 14.2, iCloud for Windows 11.5, Safari 14.0.1, tvOS 14.2, iTunes 12.11 for Windows. Processing maliciously crafted web content may lead to arbitrary code execution.
Weakness: CWE-416
Which versions are affected by CVE-2020-27918?
It affects 11 products.
Products include Apple Icloud, Apple Ipados, Apple Iphone Os, Apple Itunes, Apple Macos, Apple Safari and 5 more.
How do I fix CVE-2020-27918?
Upgrade to a fixed version.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2020-27918 being exploited?
There is no known exploitation of CVE-2020-27918 in the wild and no public exploit code.
Other vulnerabilities in Apple Icloud
Sources
Also known as DEBIAN-CVE-2020-27918, GHSA-w4gf-42f5-463m, UBUNTU-CVE-2020-27918.