TITLE: MyBulletinBoard Multiple Vulnerabilities SECUNIA ADVISORY ID: SA17577 VERIFY ADVISORY: http://secunia.com/advisories/17577/ CRITICAL: Moderately critical IMPACT: Cross Site Scripting, Manipulation of data, DoS WHERE: >From remote SOFTWARE: MyBulletinBoard (MyBB) http://secunia.com/product/4479/ DESCRIPTION: syini666 has reported some vulnerabilities in MyBulletinBoard, which can be exploited by malicious people to cause a DoS (Denial of Service), manipulate certain information, and conduct script insertion attacks. 1) Input passed to the subject field when creating a new thread isn't properly sanitised before being used. This can be exploited to inject arbitrary HTML and script code, which will be executed in a user's browser session in context of an affected site when the malicious user data is viewed in the main page. 2) Some input passed in the Reputation system isn't properly sanitised before being used. This can be exploited to inject arbitrary HTML and script code, which will be executed in a user's browser session in context of an affected site when the malicious user data is viewed in the user configuration panel. 3) The problem is that users can delete or move other users' private messages (PM). Successful exploitation requires knowledge of the ID number. 4) An unspecified error can be exploited to cause a Denial of Service on a vulnerable server. SOLUTION: 2, 4) Update to MyBB PR2 (Revision 686 updated 2005-11-01). http://www.mybboard.net/mybb_pr2_20051101.zip 1, 3) Edit the source code to ensure that input is properly sanitised and verified. PROVIDED AND/OR DISCOVERED BY: 1-3) syini666 4) Reported by vendor. ---------------------------------------------------------------------- About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities. Subscribe: http://secunia.com/secunia_security_advisories/ Definitions: (Criticality, Where etc.) http://secunia.com/about_secunia_advisories/ Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor. ---------------------------------------------------------------------- Unsubscribe: Secunia Security Advisories http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org ----------------------------------------------------------------------