CVE-2021-30796 Denial of service in Security Update - Catalina

What is CVE-2021-30796?

CVE-2021-30796 is a medium-severity denial of service vulnerability in Apple Iphone Os, published on 8 Sep 2021. 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 logic issue was addressed with improved validation. This issue is fixed in iOS 14.7, macOS Big Sur 11.5, Security Update 2021-004 Catalina, Security Update 2021-005 Mojave. Processing a maliciously crafted image may lead to a denial of service.

Which versions are affected by CVE-2021-30796?

It affects 3 products.

Products include Apple Iphone Os, Apple Mac Os X, Apple Macos.

How do I fix CVE-2021-30796?

No fix has been published for CVE-2021-30796 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-2021-30796 being exploited?

There is no known exploitation of CVE-2021-30796 in the wild and no public exploit code.

Other vulnerabilities in Apple Iphone Os

• CVE-2021-30666 Apple iOS WebKit Buffer Overflow Exploited High 8.8
• CVE-2021-30761 Apple iOS WebKit Memory Corruption Exploited High 8.8
• CVE-2021-30762 Apple iOS WebKit Use-After-Free Exploited High 8.8
• CVE-2016-4657 Apple iOS Webkit Memory Corruption Exploited High 8.8
• CVE-2019-7286 Apple Multiple Products Memory Corruption Exploited High 7.8

All Apple Iphone Os vulnerabilities

Sources

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

Also known as GHSA-cwvc-jrh4-j53h.