Clearswift MIMEsweeper for Web before 5.1.15 Hotfix allows remote attackers to cause a denial of service (crash) via an encrypted archived .RAR file, which triggers a scan error and causes the Web Policy Engine service to terminate.Referenceshttps://exchange.xforce.ibmcloud.com/vulnerabilities/27643http://secunia.com/advisories/20998http://download.mimesweeper.com/www/TechnicalDocumentation/WebReadMeHotfix5115.htmhttp://www.vupen.com/english/advisories/2006/2731