CVE-2020-1976 GlobalProtect on MacOS: Local denial-of-service (DoS) vulnerability.
Authenticated local users can cause the Mac OS kernel to hang or crash via the GlobalProtect client, requiring an upgrade to remediate.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-1976?
CVE-2020-1976 is a medium-severity denial of service vulnerability in Palo Alto Networks GlobalProtect, published on 12 Feb 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A denial-of-service (DoS) vulnerability in Palo Alto Networks GlobalProtect software running on Mac OS allows authenticated local users to cause the Mac OS kernel to hang or crash. This issue affects GlobalProtect 5.0.5 and earlier versions of GlobalProtect 5.0 on Mac OS.
Which versions are affected by CVE-2020-1976?
It affects 1 product.
Products include Paloaltonetworks Globalprotect.
How do I fix CVE-2020-1976?
No fix has been published for CVE-2020-1976 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-2020-1976 being exploited?
There is no known exploitation of CVE-2020-1976 in the wild and no public exploit code.
Other vulnerabilities in Palo Alto Networks GlobalProtect
- CVE-2025-4232 GlobalProtect: Authenticated Code Injection Through Wildcard on macOS
- CVE-2021-3057 GlobalProtect App: Buffer Overflow Vulnerability When Connecting to Portal or Gateway
- CVE-2023-0009 GlobalProtect App: Local Privilege Escalation (PE) Vulnerability
- CVE-2022-0016 GlobalProtect App: Privilege Escalation Vulnerability When Using Connect Before Logon
- CVE-2025-0120 GlobalProtect App: Local Privilege Escalation (PE) Vulnerability
Sources
Also known as GHSA-9x5h-34f3-92qm.