CVE-2018-4377 Cross-site scripting in iOS, watchOS, Safari, iTunes for Windows, iCloud for Windows
An attacker can execute arbitrary scripts in Safari via a cross-site scripting vulnerability, requiring users to update their Apple software.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2018-4377?
CVE-2018-4377 is a medium-severity cross-site scripting vulnerability in Apple Icloud, published on 3 Apr 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A cross-site scripting issue existed in Safari. This issue was addressed with improved URL validation. This issue affected versions prior to iOS 12.1, watchOS 5.1, Safari 12.0.1, iTunes 12.9.1, iCloud for Windows 7.8.
Weakness: CWE-79
Which versions are affected by CVE-2018-4377?
It affects 5 products.
Products include Apple Icloud, Apple Iphone Os, Apple Itunes, Apple Safari, Apple Watchos.
How do I fix CVE-2018-4377?
No fix has been published for CVE-2018-4377 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2018-4377 being exploited?
There is no known exploitation of CVE-2018-4377 in the wild and no public exploit code.
Other vulnerabilities in Apple Icloud
Sources
Also known as GHSA-62wm-r84h-xppr.