CF Image Host 1.6.6 Command Injection

Type packetstorm
Reporter hyp3rlinx
Modified 2015-11-16T00:00:00


                                            `[+] Credits: hyp3rlinx  
[+] Website:  
[+] Source:  
CF Image Host 1.65 - 1.6.6  
Archive download listed as: version 1.65  
unzips as imagehost 1.6.6  
Vulnerability Type:  
PHP Command Injection  
CVE Reference:  
Vulnerability Details:  
CF Imagehost allows users who have access to the management area the  
ability to write directly to the 'set.php' page under  
the /inc directory that stores setting values for the 'Site Title', 'Site  
Slogan' etc, this allows a local attacker ability to  
inject specially crafted PHP command payloads to execute arbitrary  
operating system commands on the victim host. Possibly leading  
to privilege escalation, RFI, backdoors etc.. and most likely full  
compromise of the affected system or shared environment  
if applicable.  
PHP Command Injection Exploit code(s):  
Under the setting tab we can inject following below PHP code and it will  
remain persistent as it is written disk in 'set.php',  
afterwards when the victim visits the application and click a tab the  
persistent OS command will be executed.  
1) navigate to CF image host settings tab  
2) click on admin menu on left and enter your passwords DO NOT click 'Save  
changes' yet! or you get error message to enter creds  
3) now go back to settings tab and click 'General' then inject below PHP  
code into the 'Site Title' input field  
4) now click 'Save Changes', this code will get stored under /inc  
directory within the 'set.php' PHP file.  
our PHP injection payload needs the single quotes, double back slashes,  
semicolons as described below to correctly escape the syntax  
so we do not break the PHP page and cause errors, our extra \\ quoutes and  
; gets removed after injection takes place.  
some examples...  
';echo exec("c:\\Windows\\system32\\calc.exe");'';';  
'set.php' on line 11 then becomes:  
$settings['SET_TITLE'] = '';echo  
OR inject CMD to launch chrome.exe etc...  
';echo exec("c:\\Program Files  
After, click on some tabs above like 'Database' or 'Ban User' and Tada!  
this will execute our stored PHP command...  
either running calc.exe or launching Google Chrome.  
Disclosure Timeline:  
Vendor Notification: NA  
November 13, 2015 : Public Disclosure  
Exploitation Technique:  
Local / Remote  
Severity Level:  
Request Method(s): [+] POST  
Vulnerable Product: [+] CF Image Host 1.65 - 1.6.6  
Vulnerable Parameter(s): [+] 'Site Title', 'Site Slogan' etc..  
Affected Area(s): [+] OS  
[+] Disclaimer  
Permission is hereby granted for the redistribution of this advisory,  
provided that it is not altered except by reformatting it, and that due  
credit is given. Permission is explicitly given for insertion in  
vulnerability databases and similar, provided that due credit is given to  
the author.  
The author is not responsible for any misuse of the information contained  
herein and prohibits any malicious use of all security related information  
or exploits by the author or elsewhere.  
by hyp3rlinx