CVE-2021-1861 Information disclosure in macOS
A malicious website can track users by exploiting cache occupancy logic flaws in macOS, allowing for user identification.
- 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-2021-1861?
CVE-2021-1861 is a medium-severity vulnerability in Apple Macos, 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
An issue existed in determining cache occupancy. The issue was addressed through improved logic. This issue is fixed in macOS Big Sur 11.3. A malicious website may be able to track users by setting state in a cache.
Which versions are affected by CVE-2021-1861?
It affects 1 product.
Products include Apple Macos.
How do I fix CVE-2021-1861?
No fix has been published for CVE-2021-1861 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-1861 being exploited?
There is no known exploitation of CVE-2021-1861 in the wild and no public exploit code.
Other vulnerabilities in Apple Macos
Sources
Also known as GHSA-mwpq-gg3q-w4qr.