CVE-2021-3057: GlobalProtect App: Buffer Overflow Vulnerability When Connecting to Portal or Gateway
First published: Wed Oct 13 2021(Updated: )
A stack-based buffer overflow vulnerability exists in the Palo Alto Networks GlobalProtect app that enables a man-in-the-middle attacker to disrupt system processes and potentially execute arbitrary code with SYSTEM privileges. This issue impacts: GlobalProtect app 5.1 versions earlier than GlobalProtect app 5.1.9 on Windows; GlobalProtect app 5.2 versions earlier than GlobalProtect app 5.2.8 on Windows; GlobalProtect app 5.2 versions earlier than GlobalProtect app 5.2.8 on the Universal Windows Platform; GlobalProtect app 5.3 versions earlier than GlobalProtect app 5.3.1 on Linux.
Credit: psirt@paloaltonetworks.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Paloaltonetworks Globalprotect | >=5.0<=5.0.8 | |
| Paloaltonetworks Globalprotect | >=5.0<=5.0.9 | |
| Paloaltonetworks Globalprotect | >=5.0<=5.0.10 | |
| Paloaltonetworks Globalprotect | >=5.1<=5.1.1 | |
| Paloaltonetworks Globalprotect | >=5.1<=5.1.1 | |
| Paloaltonetworks Globalprotect | >=5.1<5.1.9 | |
| Paloaltonetworks Globalprotect | >=5.1.0<=5.1.4 | |
| Paloaltonetworks Globalprotect | >=5.2<5.2.8 | |
| Paloaltonetworks Globalprotect | >=5.2<5.2.8 | |
| Paloaltonetworks Globalprotect | >=5.2<5.2.8 | |
| Paloaltonetworks Globalprotect | >=5.2<5.2.8 | |
| Paloaltonetworks Globalprotect | >=5.3<5.3.1 | |
| Paloaltonetworks Globalprotect | =5.0 |
Remedy
This issue is fixed in GlobalProtect app 5.1.9 on Windows, GlobalProtect app 5.2.8 on Windows and on Universal Windows Platform, GlobalProtect app 5.3.1 on Linux, and all later GlobalProtect app versions.
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Reference Links
Frequently Asked Questions
What is CVE-2021-3057?
CVE-2021-3057 is a stack-based buffer overflow vulnerability in the Palo Alto Networks GlobalProtect app that allows a man-in-the-middle attacker to disrupt system processes and potentially execute arbitrary code with SYSTEM privileges.
Which versions of the GlobalProtect app are affected by CVE-2021-3057?
GlobalProtect app versions earlier than 5.1 are affected by CVE-2021-3057.
What is the severity of CVE-2021-3057?
The severity of CVE-2021-3057 is critical, with a severity score of 8.1.
How can a man-in-the-middle attacker exploit CVE-2021-3057?
A man-in-the-middle attacker can exploit CVE-2021-3057 by intercepting and modifying network traffic between the GlobalProtect app and the server it communicates with.
Is there a fix available for CVE-2021-3057?
Yes, Palo Alto Networks has released a patch to address the vulnerability. Affected users should update to the latest version of the GlobalProtect app.
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- version/paloaltonetworks globalprotect/5.0.9
- version/paloaltonetworks globalprotect/5.0.10
- version/paloaltonetworks globalprotect/5.1
- version/paloaltonetworks globalprotect/5.1.1
- version/paloaltonetworks globalprotect/5.1.0
- version/paloaltonetworks globalprotect/5.1.4
- version/paloaltonetworks globalprotect/5.2
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