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Pulse Secure VPN gzip RCE

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Pulse Secure VPN gzip RCE

Disclosed
10/26/2020
Created
12/18/2020

Description

The Pulse Connect Secure appliance before 9.1R9 suffers from an uncontrolled gzip extraction vulnerability which allows an attacker to overwrite arbitrary files, resulting in Remote Code Execution as root. Admin credentials are required for successful exploitation. Of note, MANY binaries are not in `$PATH`, but are located in `/home/bin/`.

Author(s)

  • h00die
  • Spencer McIntyre
  • Richard Warren <richard.warren@nccgroup.com>
  • David Cash <david.cash@nccgroup.com>

Platform

Linux,Unix

Architectures

cmd, x86, x64

Development

Module Options

To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':

msf > use exploit/linux/http/pulse_secure_gzip_rce
msf exploit(pulse_secure_gzip_rce) > show targets
    ...targets...
msf exploit(pulse_secure_gzip_rce) > set TARGET < target-id >
msf exploit(pulse_secure_gzip_rce) > show options
    ...show and set options...
msf exploit(pulse_secure_gzip_rce) > exploit

Time is precious, so I don’t want to do something manually that I can automate. Leveraging the Metasploit Framework when automating any task keeps us from having to re-create the wheel as we can use the existing libraries and focus our efforts where it matters.

– Jim O’Gorman | President, Offensive Security

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