Multiple vulnerabilities have been identified in Microsoft Exchange, which could be exploited by attackers to execute arbitrary scripting code, cause a denial of service, or take complete control of an affected system.
The first issue is caused by an input validation error in the Outlook Web Access (OWA) service when handling UTF encoded attachments, which could be exploited by attackers to cause arbitrary scripting code to be executed by the user's browser in the security context of an affected Web site [...]
References
http://www.frsirt.com/english/advisories/2007/1711
http://www.microsoft.com/technet/security/bulletin/ms07-026.mspx
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=526
Credits
Vulnerabilities reported by Martijn Brinkers (Izecom), Alexander Sotirov (Determina Security Research), Joxean Koret and iDefense Labs.
ChangeLog
2007-05-08 : Initial release
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