Vulnerabilities > CVE-2018-14847 - Path Traversal vulnerability in Mikrotik Routeros
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
PARTIAL Availability impact
NONE Summary
MikroTik RouterOS through 6.42 allows unauthenticated remote attackers to read arbitrary files and remote authenticated attackers to write arbitrary files due to a directory traversal vulnerability in the WinBox interface.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Relative Path Traversal An attacker exploits a weakness in input validation on the target by supplying a specially constructed path utilizing dot and slash characters for the purpose of obtaining access to arbitrary files or resources. An attacker modifies a known path on the target in order to reach material that is not available through intended channels. These attacks normally involve adding additional path separators (/ or \) and/or dots (.), or encodings thereof, in various combinations in order to reach parent directories or entirely separate trees of the target's directory structure.
- Directory Traversal An attacker with access to file system resources, either directly or via application logic, will use various file path specification or navigation mechanisms such as ".." in path strings and absolute paths to extend their range of access to inappropriate areas of the file system. The attacker attempts to either explore the file system for recon purposes or access directories and files that are intended to be restricted from their access. Exploring the file system can be achieved through constructing paths presented to directory listing programs, such as "ls" and 'dir', or through specially crafted programs that attempt to explore the file system. The attacker engaging in this type of activity is searching for information that can be used later in a more exploitive attack. Access to restricted directories or files can be achieved through modification of path references utilized by system applications.
- File System Function Injection, Content Based An attack of this type exploits the host's trust in executing remote content including binary files. The files are poisoned with a malicious payload (targeting the file systems accessible by the target software) by the attacker and may be passed through standard channels such as via email, and standard web content like PDF and multimedia files. The attacker exploits known vulnerabilities or handling routines in the target processes. Vulnerabilities of this type have been found in a wide variety of commercial applications from Microsoft Office to Adobe Acrobat and Apple Safari web browser. When the attacker knows the standard handling routines and can identify vulnerabilities and entry points they can be exploited by otherwise seemingly normal content. Once the attack is executed, the attackers' program can access relative directories such as C:\Program Files or other standard system directories to launch further attacks. In a worst case scenario, these programs are combined with other propagation logic and work as a virus.
- Using Slashes and URL Encoding Combined to Bypass Validation Logic This attack targets the encoding of the URL combined with the encoding of the slash characters. An attacker can take advantage of the multiple way of encoding an URL and abuse the interpretation of the URL. An URL may contain special character that need special syntax handling in order to be interpreted. Special characters are represented using a percentage character followed by two digits representing the octet code of the original character (%HEX-CODE). For instance US-ASCII space character would be represented with %20. This is often referred as escaped ending or percent-encoding. Since the server decodes the URL from the requests, it may restrict the access to some URL paths by validating and filtering out the URL requests it received. An attacker will try to craft an URL with a sequence of special characters which once interpreted by the server will be equivalent to a forbidden URL. It can be difficult to protect against this attack since the URL can contain other format of encoding such as UTF-8 encoding, Unicode-encoding, etc.
- Manipulating Input to File System Calls An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.
Exploit-Db
description Mikrotik WinBox 6.42 - Credential Disclosure (golang). Webapps exploit for Hardware platform id EDB-ID:45209 last seen 2018-08-17 modified 2018-08-17 published 2018-08-17 reporter Exploit-DB source https://www.exploit-db.com/download/45209/ title Mikrotik WinBox 6.42 - Credential Disclosure (golang) description MicroTik RouterOS < 6.43rc3 - Remote Root. CVE-2018-14847. Remote exploit for Hardware platform. Tags: Remote file exploits/hardware/remote/45578.cpp id EDB-ID:45578 last seen 2018-10-10 modified 2018-10-10 platform hardware port published 2018-10-10 reporter Exploit-DB source https://www.exploit-db.com/download/45578/ title MicroTik RouterOS < 6.43rc3 - Remote Root type remote
Nessus
NASL family | Misc. |
NASL id | MIKROTIK_CVE_2018-14847.NASL |
description | The remote networking device is running a version of MikroTik RouterOS vulnerable to an unauthenticated arbitrary file read and write vulnerability. An unauthenticated attacker could leverage this vulnerability to read or write protected files on the affected host. Nessus was able to exploit this vulnerability to retrieve the device credential store. |
last seen | 2020-04-30 |
modified | 2018-09-06 |
plugin id | 117335 |
published | 2018-09-06 |
reporter | This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof. |
source | https://www.tenable.com/plugins/nessus/117335 |
title | MikroTik RouterOS Winbox Unauthenticated Arbitrary File Read/Write Vulnerability |
Packetstorm
data source https://packetstormsecurity.com/files/download/149742/mikrotikrouteros-exec.txt id PACKETSTORM:149742 last seen 2018-10-11 published 2018-10-10 reporter Jacob Baines source https://packetstormsecurity.com/files/149742/Mikrotik-RouterOS-Remote-Root.html title Mikrotik RouterOS Remote Root data source https://packetstormsecurity.com/files/download/148958/mikrotikwinbox642-disclose.txt id PACKETSTORM:148958 last seen 2018-08-18 published 2018-08-17 reporter Maxim Yefimenko source https://packetstormsecurity.com/files/148958/Mikrotik-WinBox-6.42-Credential-Disclosure.html title Mikrotik WinBox 6.42 Credential Disclosure
The Hacker News
id THN:15F5633BC0BA0C82579744CCACA99558 last seen 2018-10-08 modified 2018-10-08 published 2018-10-08 reporter The Hacker News source https://thehackernews.com/2018/10/router-hacking-exploit.html title New Exploit for MikroTik Router WinBox Vulnerability Gives Full Root Access id THN:31DAF3FB72A6AB73A54307C968C6570C last seen 2018-09-04 modified 2018-09-04 published 2018-09-04 reporter The Hacker News source https://thehackernews.com/2018/09/mikrotik-router-hacking.html title Thousands of MikroTik Routers Hacked to Eavesdrop On Network Traffic
Related news
- New Exploit for MikroTik Router WinBox Vulnerability Gives Full Root Access (source)
- MikroTik shares info on securing routers hit by massive Mēris botnet (source)
- Hundreds of thousands of MikroTik devices still vulnerable to botnets (source)
- Trickbot uses compromised MikroTik routers as C2 communication proxies (source)
References
- https://github.com/BasuCert/WinboxPoC
- https://github.com/BigNerd95/WinboxExploit
- https://github.com/tenable/routeros/blob/master/bug_hunting_in_routeros_derbycon_2018.pdf
- https://github.com/tenable/routeros/tree/master/poc/bytheway
- https://github.com/tenable/routeros/tree/master/poc/cve_2018_14847
- https://n0p.me/winbox-bug-dissection/
- https://www.exploit-db.com/exploits/45578/