CVE-2020-9977 Information disclosure in iOS and iPadOS
A malicious application can determine a user's open tabs in Safari due to insufficient entitlement verification in Apple operating systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-9977?
CVE-2020-9977 is a medium-severity vulnerability in Apple Ipados, published on 8 Dec 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A validation issue existed in the entitlement verification. This issue was addressed with improved validation of the process entitlement. This issue is fixed in macOS Big Sur 11.0.1, iOS 14.0 and iPadOS 14.0. A malicious application may be able to determine a user's open tabs in Safari.
Weakness: CWE-20
Which versions are affected by CVE-2020-9977?
It affects 3 products.
Products include Apple Ipados, Apple Iphone Os, Apple Mac Os X.
How do I fix CVE-2020-9977?
No fix has been published for CVE-2020-9977 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-9977 being exploited?
There is no known exploitation of CVE-2020-9977 in the wild and no public exploit code.
Other vulnerabilities in Apple Ipados
- CVE-2025-43300 Apple iOS, iPadOS, and macOS Out-of-Bounds Write
- CVE-2025-24201 Apple Multiple Products WebKit Out-of-Bounds Write
- CVE-2025-24085 Apple Multiple Products Use-After-Free
- CVE-2025-31200 Apple Multiple Products Memory Corruption
- CVE-2025-31201 Apple Multiple Products Arbitrary Read and Write
Sources
Also known as GHSA-hj4j-qvhm-2c74.