CVE-2020-9783 Use after free in Safari

What is CVE-2020-9783?

CVE-2020-9783 is a high-severity use after free vulnerability in Apple Icloud, published on 1 Apr 2020. 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 use after free issue was addressed with improved memory management. This issue is fixed in iOS 13.4 and iPadOS 13.4, tvOS 13.4, Safari 13.1, iTunes for Windows 12.10.5, iCloud for Windows 10.9.3, iCloud for Windows 7.18. Processing maliciously crafted web content may lead to code execution.

Weakness: CWE-416

Which versions are affected by CVE-2020-9783?

It affects 6 products.

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

How do I fix CVE-2020-9783?

No fix has been published for CVE-2020-9783 yet. Limit exposure of the affected software until one is available.

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-2020-9783 being exploited?

There is no known exploitation of CVE-2020-9783 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-hwpw-whxv-42xc.