CVE-2018-4474 Denial of service in Safari

What is CVE-2018-4474?

CVE-2018-4474 is a high-severity denial of service vulnerability in Apple Icloud, published on 27 Oct 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A memory consumption issue was addressed with improved memory handling. This issue is fixed in iCloud for Windows 7.7, watchOS 5, Safari 12, iOS 12, iTunes 12.9 for Windows, tvOS 12. Unexpected interaction causes an ASSERT failure.

Weakness: CWE-400

Which versions are affected by CVE-2018-4474?

It affects 6 products.

Products include Apple Icloud, Apple Iphone Os, Apple Itunes, Apple Safari, Apple Tvos, Apple Watchos.

How do I fix CVE-2018-4474?

No fix has been published for CVE-2018-4474 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2018-4474 being exploited?

There is no known exploitation of CVE-2018-4474 in the wild and no public exploit code.

Other vulnerabilities in Apple Icloud

• CVE-2019-8506 Apple Multiple Products Type Confusion Exploited High 8.8
• CVE-2020-27932 Apple Multiple Products Type Confusion Exploited High 7.8
• CVE-2019-8746 Memory corruption in iOS Critical 9.8
• CVE-2019-8749 Memory corruption in iOS Critical 9.8
• CVE-2019-8756 Memory corruption in iOS Critical 9.8

All Apple Icloud vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-jr79-gh2g-m9rv.