CVE-2021-30666 Apple iOS WebKit Buffer Overflow
Attackers can execute arbitrary code on iOS devices by tricking users into visiting malicious web content, requiring immediate patching.
- Exploited in the wild
- Since 3 Nov 2021
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-30666?
CVE-2021-30666 is a high-severity memory corruption 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 buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 12.5.3. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited..
Weakness: CWE-119
Which versions are affected by CVE-2021-30666?
It affects 1 product.
Products include Apple Iphone Os.
How do I fix CVE-2021-30666?
Apply the vendor's patch. US federal agencies must fix it by 17 Nov 2021.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-30666 being exploited?
Yes. Attackers have exploited CVE-2021-30666 in the wild since at least 3 Nov 2021.
Other vulnerabilities in Apple Iphone Os
Sources
Also known as DEBIAN-CVE-2021-30666, GHSA-4cx8-frpf-fjc3, UBUNTU-CVE-2021-30666.