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 Advisory Text : -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 [phpBB 2.0.19 XSS cXIb8O3.23] Author: Maksymilian Arciemowicz (cXIb8O3) Date: 6.1.2006 from SecurityReason.Com CVE : CVE-2006-0063 - --- 0.Description --- phpBB is a high powered, fully scalable, and highly customizable Open Source bulletin board package. phpBB has a user-friendly interface, simple and straightforward administration panel, and helpful FAQ. Based on the powerful PHP server language and your choice of MySQL, MS-SQL, PostgreSQL or Access/ODBC database servers, phpBB is the ideal free community solution for all web sites. Contact with author http://www.phpbb.com/about.php. - --- 1. XSS --- If in phpbb is Allowed HTML tags "ON" like b,i,u,pre and have you in profile "Always allow HTML: YES" or are you Guest This issue is in phpBB 2.0.19 . Some Details : Old exploit for x <= 2.0.18 was (http://securityreason.com/achievement_securityalert/29) : <B C=">" onmouseover="alert('SecurityReason.Com')" X="<B "> H E L O </B> New exploit for x <= 2.0.19 is : <B C='>' onmouseover='alert("SecurityReason.Com")' X='<B '> SecurityReason.Com </B> The exploits are simillar but not the same ! As you can notice the " is replaced to ' In new version phpBB they only filter " but not ' that you can use this tags: <B C='>' onmouseover='alert("SecurityReason.Com")' X='<B '> SecurityReason.Com </B> Exploit: <B C='>' onmouseover='alert(document.location="http://SecurityReason.Com")' X='<B '> SecurityReason.Com </B> - --- SecurityReason Note : According to http://www.phpbb.com/phpBB/viewtopic.php?t=352966 [Sec] fixed XSS issue (only valid for Internet Explorer) within the url bbcode [Sec] fixed XSS issue (only valid for Internet Explorer) if html tags are allowed and enabled SecurityReason tested this issue before public advisory : http://securityreason.com/achievement_securityalert/29 and the XSS is working on : - -> Mozilla - -> Internet Explorer ( so !not! only valid Internet Explorer) - -> Opera - -> Firefox - -> Links As proof SecurityReason show examples of working XSS on screens : http://securityreason.com/downloads/mozilla.png -> Mozilla http://securityreason.com/downloads/opera.png -> Opera http://securityreason.com/downloads/firefox.png -> Firefox http://securityreason.com/downloads/links.png -> Links - --- We have reported this bug to phpbb bugtraq and: phpBB Team respone : - -------------------- ... we do not intended to fix the previous issue in 2.0.19 (it was just preventing it by the quote change, which was good - but we intended this change because of other forseeable issues) - and i do not intend to fix this one. HTML is and was always "bad" and has been stated as being able to be entered "as is". In olympus we will therefore remove html support completely ... - -------------------- So Solusion is: phpBB Team respone : - ------------------- I already said we will fix it in CVS but do not see the need to release a new version immediatly. - ------------------- So there is no fix for this . Only way to protect is : Allow HTML = Off - --- 2. Greets --- sp3x - --- 3.Contact --- Author: SecurityReason.Com [ Maksymilian Arciemowicz ( cXIb8O3 ) ] Email: max [at] jestsuper [dot] pl or cxib [at] securityreason [dot] com GPG: http://securityreason.com/key/Arciemowicz.Maksymilian.gpg SecurityReason.Com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFDvSzX3Ke13X/fTO4RAqlOAJ9eX7rok/p3Q0VHmYP8J21h26PvpgCbBGmJ mGGvK34tnNCl1WdnpZxfAcY= =dyrx -----END PGP SIGNATURE----- |
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CVE : 
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- 2009-05-30