https://github.com/mbadanoiu/cve-2020-8250

CVE-2020-8250: Privilege Escalation via Command Injection in Pulse Secure VPN Linux Client
https://github.com/mbadanoiu/cve-2020-8250

0-day command-injection cve cve-2020-8250 cves local-privilege-escalation

Last synced: 2 days ago
JSON representation

CVE-2020-8250: Privilege Escalation via Command Injection in Pulse Secure VPN Linux Client

• Host: GitHub
• URL: https://github.com/mbadanoiu/cve-2020-8250
• Owner: mbadanoiu
• Created: 2023-11-26T13:35:43.000Z (12 months ago)
• Default Branch: main
• Last Pushed: 2023-11-26T15:16:39.000Z (12 months ago)
• Last Synced: 2023-11-26T17:27:34.461Z (12 months ago)
• Topics: 0-day, command-injection, cve, cve-2020-8250, cves, local-privilege-escalation
• Homepage:
• Size: 593 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        
# CVE-2020-8250: Privilege Escalation via Command Injection in Pulse Secure VPN Linux Client

The root SUID executable pulsesvc, has a function “do_upload” that unsafely passes the “HOME” environmental variable to “system()”. By altering the “HOME” variable to contain special shell characters (Ex: “``” or “$()”), an attacker can inject arbitrary commands when “do_upload” is called and can elevate his/her privileges to root.

### NVD Disclosure:

The ND disclosure for this vulnerability can be found [here](https://nvd.nist.gov/vuln/detail/CVE-2020-8250).

### Requirements:

The exploit targets code that is accessed post client authentication, that means that in order to exploit this vulnerability an attacker would require one of the 3 scenarios:

- Hosting an attacker-controlled Pulse VPN Server

- A valid SSL/TLS certificate to host a dummy VPN server (Can be easily done with solutions such as “Let’s Encrypt”)

- Connecting to a legitimate Pulse VPN Server (User credentials/Client certificates may be found directly on the compromised client)

### Proof Of Concept:

More details and the exploitation process can be found in this [PDF](https://github.com/mbadanoiu/CVE-2020-8250/blob/main/Pulse%20Secure%20VPN%20Linux%20Client%20-%20CVE-2020-8250.pdf).