https://github.com/stealthcopter/cve-2020-28243

CVE-2020-28243 Local Privledge Escalation Exploit in SaltStack Minion
https://github.com/stealthcopter/cve-2020-28243

cve cve-2020-28243 privilege-escalation saltstack saltstack-minion

Last synced: 1 day ago
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CVE-2020-28243 Local Privledge Escalation Exploit in SaltStack Minion

• Host: GitHub
• URL: https://github.com/stealthcopter/cve-2020-28243
• Owner: stealthcopter
• Created: 2020-12-22T19:35:15.000Z (almost 4 years ago)
• Default Branch: main
• Last Pushed: 2021-03-03T08:01:22.000Z (over 3 years ago)
• Last Synced: 2024-09-22T20:01:47.786Z (3 days ago)
• Topics: cve, cve-2020-28243, privilege-escalation, saltstack, saltstack-minion
• Language: Shell
• Homepage:
• Size: 684 KB
• Stars: 17
• Watchers: 3
• Forks: 4
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# CVE-2020-28243

A command injection vulnerability in SaltStack's Salt allows for privilege escalation via specially crafted process names on a minion when the master calls restartcheck. For a full writeup please see [this blog post](https://sec.stealthcopter.com/cve-2020-28243/)

**Affected Versions:** All versions between 2016.3.0rc2 and 3002.2

**Links:** [Mitre](https://cve.mitre.org/cgi-bin/cvename.cgi?name=2020-28243), [NVD](https://nvd.nist.gov/vuln/detail/CVE-2020-28243)

## Requirements

For this exploit to work the following are needed:

- SaltStack Minion between 2016.3.0rc2 and 3002.5

- Write/Exec access to a directory that isn't explicitly ignored by SaltStack

- Master needs to call `restartcheck.restartcheck` on this minion to trigger the exploit

## Usage

```

./exploit.sh -w PATH -c 'COMMAND'

  -w PATH       writable path (and not blocked by SaltStack)

  -c COMMAND    command to execute

```

### Screenshot

![screenshot](media/screenshot1.png)

### Files

- exploit.sh - The exploit script to perform the privilege escalation.

- helper.c - Helper C program that will create the file handler for us, this could probably be replaced with a python or bash script. This file will be automatically generated by the exploit script. 

### Static Binaries

When gcc is not available to compile the helper binary on the target machine, you can compile it on your machine and copy the binary over. 

```

gcc helper.c -o ./helper -static

# Or for 32 bit: 

gcc helper.c -o ./helper -m32 -static  

```

Alternatively static binaries have been provided in this repo that you can use in the `static` folder.