SYSTEM code execution via oversized portal configuration
Published Oct 13, 2021 · Updated Sep 17, 2024
Stack-based buffer overflow in Palo Alto Networks GlobalProtect App allows man-in-the-middle attackers to execute code with SYSTEM privileges. The privileged PanGPS service processes overlong strings from an encrypted portal configuration in a fixed-size stack buffer, overwriting the stack cookie and frame pointer. Exploitation requires control of the portal response through a man-in-the-middle position; successful attacks can crash PanGPS or run code as SYSTEM.
Summary
What happened
Stack-based buffer overflow in Palo Alto Networks GlobalProtect App allows man-in-the-middle attackers to execute code with SYSTEM privileges. The privileged PanGPS service processes overlong strings from an encrypted portal configuration in a fixed-size stack buffer, overwriting the stack cookie and frame pointer. Exploitation requires control of the portal response through a man-in-the-middle position; successful attacks can crash PanGPS or run code as SYSTEM.
The record
- CVE
- CVE-2021-3057
- Published
- Oct 13, 2021
- Updated
- Sep 17, 2024
- Vendor
- Palo Alto Networks
- Product
- GlobalProtect App
- Classifications
- CWE-121, T1557, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 13, 2021CVE publishedPublication date reported by the CVE source.
- Sep 17, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=5.1 <5.1.9 changes=[{"at":"5.1.9","status":"unaffected"}]
- Affected versionversion=5.2 <5.2.8 changes=[{"at":"5.2.8","status":"unaffected"}]
- Affected versionversion=5.3 <5.3.1 changes=[{"at":"5.3.1","status":"unaffected"}]
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- PanGPS oversized portal-configuration proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo