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Maxthon / Avant Browser XCS / Same Origin Bypass

Maxthon / Avant Browser XCS / Same Origin Bypass
Posted Dec 6, 2012
Authored by Roberto Suggi Liverani | Site security-assessment.com

Maxthon and Avant browsers suffer from various flaws such as same origin policy bypass, cross context scripting, and various other vulnerabilities.

tags | advisory, vulnerability
MD5 | b65ef9e12524d460a0c05223b1d1b4c7

Maxthon / Avant Browser XCS / Same Origin Bypass

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Hi,

Below you can find a short summary of discovered vulnerabilities in Maxthon
and Avant browsers.
Such vulnerabilities were demonstrated during HITBAMS2012 security
conference and more recently at HackPra.

Affected Products

- Maxthon (www.maxthon.com)
- Avant Browser (www.avantbrowser.com)

Security advisories

- [advisory] Maxthon multiple vulnerabilities:
http://www.security-assessment.com/files/documents/advisory/Maxthon_multiple_vulnerabilities_advisory.pdf
- [advisory] Avant multiple vulnerabilities:
http://www.security-assessment.com/files/documents/advisory/Avant_multiple_vulnerabilities_advisory.pdf

Individual security advisories, exploit modules and video links can be
found below.

[1] Maxthon - Cross Context Scripting - about: history - Remote Code
Execution

[advisory]
http://blog.malerisch.net/2012/12/maxthon-cross-context-scripting-xcs-about-history-rce.html
[metasploit module]
https://github.com/malerisch/metasploit-framework/blob/maxthon3/modules/exploits/windows/browser/maxthon_history_xcs.rb
[demo] http://www.youtube.com/watch?v=d-55asVLqNI


[2] Maxthon - Cross Context Scripting (XCS) - RSS - Remote Code Execution

[advisory]
http://blog.malerisch.net/2012/12/maxthon-cross-context-scripting-xcs-rss-rce.html
[metasploit module]
https://github.com/malerisch/metasploit-framework/blob/maxthon3/modules/exploits/windows/browser/maxthon_rss_xcs.rb
[demo] http://www.youtube.com/watch?v=d-55asVLqNI


[3] Maxthon - Privileged APIs on i.maxthon.com

[advisory]
http://blog.malerisch.net/2012/12/maxthon-privileged-api-imaxthoncom.html
[demo] http://www.youtube.com/watch?v=1IqZBS0O2Hs


[4] Maxthon - Cross Context Scripting (XCS) - Bookmark Toolbar and Bookmark
Sidebar - Code Execution

[advisory]
http://blog.malerisch.net/2012/12/maxthon-cross-context-scripting-xcs-bookmark.html
[demo] http://www.youtube.com/watch?v=YR0RQz45t3M


[5] Maxthon - Incorrect Executable File Handling and Same Origin Policy
Implementation

[advisory]
http://blog.malerisch.net/2012/12/maxthon-incorrect-executable-file-sop.html


[6] Avant Browser - Same of Origin Policy Bypass - browser:home

[advisory]
http://blog.malerisch.net/2012/12/avant-browser-same-of-origin-policy.html
[BeEF module]
https://github.com/malerisch/beef/tree/avant_browser/modules/exploits/avant_steal_history
[demo] http://www.youtube.com/watch?v=I4LiSfTmuM0


[7] Avant Browser - Stored Cross Site Scripting - Feed Reader
(browser://localhost/lst?*)

[advisory]
http://blog.malerisch.net/2012/12/avant-browser-stored-cross-site-scripting.html
[demo] http://www.youtube.com/watch?v=-mShxsspxy8


[8] Avant Browser - Cross Context Scripting - browser:home - Most Visited
And History Tabs

[advisory]
http://blog.malerisch.net/2012/12/avant-browser-cross-context-scripting.html
[demo] http://www.youtube.com/watch?v=cHHtsOpYGH4

References

[presentation] HITBAMS2012 - Window Shopping: Browser Bugs Hunting in 2012
-
http://www.security-assessment.com/files/documents/presentations/window_shopping_browser_bug_hunting_in_2012_roberto_suggi_liverani_scott_bell.pdf
[presentation] HackPra - Cross Context Scripting attacks & exploitation -
http://www.slideshare.net/robertosl81/cross-context-scripting-attacks-exploitation

Any further material, comments or updates will be communicated over
Twitter, at https://twitter.com/malerisch

Roberto Suggi Liverani

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