[DSECRG-08-008] Textpattern 4.0.5 Multiple Security Vulnerabilities
Digital Security Research Group [DSecRG] Advisory #DSECRG-08-008
Application: Txp CMS
Versions Affected: 4.0.5
Vendor URL: http://www.textpattern.com
Bugs: DOS, multiple XSS, etc.
Exploits: YES
Reported: 11.01.2008
Vendor response: 14.01.2008
Patch Released: 03.02.2008
Date of Public Advisory: 04.02.2008
Authors: Alexandr Polyakov, Stas Svistunovich
Digital Security Research Group [DSecRG]
(research [at] dsec [dot] ru)
Description
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Textpattern system has multiple security vulnerabilities:
1. Parameter Value Overflow
2. Linked XSS
3. XSS in POST
4. Stored XSS
5. Insecure password changing algorithm
Details
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1. Parameter Value Overflow
Vulnerability found in script index.php in comments section. Post parameter
"message".
The application does not ensure that the parameter value length. It can be used
for performing a DOS attack.
Example:
message = [A]x10000
--------------------------------------------------------------------------------------------
2. Linked XSS vulnerability found in /textpattern/setup/index.php, attacker can
inject XSS in URL string.
Example:
http://[server]/[installdir]/textpattern/setup/index.php/";><script>alert('DSecRG
XSS')</script>
--------------------------------------------------------------------------------------------
3. XSS in POST
Vulnerability found in script index.php in comments section. Post parameter
"name".
Example:
name = <img src="javascript:alert('DSecRG XSS')">
name = <script>alert('DSecRG XSS')</script>
--------------------------------------------------------------------------------------------
4. Stored XSS
Vulnerability found in script textpattern/index.php?event=article in post
parameter "Body".
Example:
Body = <IMG SRC=javascript:alert("DSecRG_XSS")>
--------------------------------------------------------------------------------------------
5. Insecure password changing algorithm
Previous password not required to set a new password.
If attacker gain access to admin session by using XSS vulnerability, he can
change admin password without knowing old password.
It will be more secure to ask old password when changing password or primary
email.
Fix Information
***************
Textpattern was altered to fix this flaw on 03.02.2008. Updated version (4.0.6)
can be downloaded here:
http://textpattern.com/download
About
*****
Digital Security is leading IT security company in Russia, providing
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analysis and ISMS-related services and certification for ISO/IEC 27001:2005 and
PCI DSS standards. Digital Security Research Group focuses on web application
and database security problems with vulnerability reports, advisories and
whitepapers posted regularly on our website.
Contact: research [at] dsec [dot] ru
http://www.dsec.ru (in Russian)
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