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Apache HTTP Server 2.4.49/2.4.50 Remote Code Execution (CVE-2021-42013)

hackviser

Task: Apache HTTP Server 2.4.49/2.4.50 with CVE-2021-42013 path traversal and RCE vulnerability, goal is to read /secret.txt. Solution: Double URL-encoded path traversal (%%32%65%%32%65 = ..) through /cgi-bin/ ScriptAlias to reach /bin/sh and execute cat /secret.txt.

rce path_traversal apache cgi cve_2021_41773 double_url_encoding cve_2021_42013

double_url_encoding_bypassscriptalias_abusepath_traversal_to_rcecgi_command_execution

$ ls tags/ techniques/

rce path_traversal apache cgi cve_2021_41773 double_url_encoding cve_2021_42013

double_url_encoding_bypassscriptalias_abusepath_traversal_to_rcecgi_command_execution

Analysis

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$ python3 exploit.py --target 192.168.1.1 --port 8080
[*] Connecting to target...
[+] Shell obtained!

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