====================================================================== Secunia Research 13/09/2010 - MailEnable SMTP Service Two Denial of Service Vulnerabilities - ====================================================================== Table of Contents Affected Software....................................................1 Severity.............................................................2 Vendor's Description of Software.....................................3 Description of Vulnerability.........................................4 Solution.............................................................5 Time Table...........................................................6 Credits..............................................................7 References...........................................................8 About Secunia........................................................9 Verification........................................................10 ====================================================================== 1) Affected Software * MailEnable 4.25 Standard, Professional, and Enterprise Editions. NOTE: Other versions may also be affected. ====================================================================== 2) Severity Rating: Moderately critical Impact: Denial of Service Where: From remote ====================================================================== 3) Vendor's Description of Software "MailEnable's mail server software provides a powerful, scalable hosted messaging platform for Microsoft Windows. MailEnable offers stability, unsurpassed flexibility and an extensive feature set which allows you to provide cost-effective mail services." Product Link: http://www.mailenable.com/default.asp ====================================================================== 4) Description of Vulnerability Secunia Research has discovered two vulnerabilities in MailEnable, which can be exploited by malicious people to cause a DoS (Denial of Service). 1) An insufficient length check when appending data to a predefined log message into a buffer using strcat_s() may result in an unhandled invalid parameter error. This can be exploited to crash the SMTP service (MESMTPC.exe) via an overly long email address in the "MAIL FROM" command. 2) An insufficient length check when copying data with a predefined log message into a buffer using strcpy_s() may result in an unhandled invalid parameter error. This can be exploited to crash the SMTP service (MESMTPC.exe) via an overly long domain name in the "RCPT TO" command. ====================================================================== 5) Solution Update to version 4.26 or apply hotfix ME-10044. ====================================================================== 6) Time Table 03/09/2010 - Requested security contact from the vendor. 04/09/2010 - Vendor response. 06/09/2010 - Vulnerability details provided to the vendor. 08/09/2010 - Vendor provides fixed version. 10/09/2010 - Secunia Research confirms fixes. 13/09/2010 - Vendor releases fixed version. 13/09/2010 - Public disclosure ====================================================================== 7) Credits Discovered by Dmitriy Pletnev, Secunia Research. ====================================================================== 8) References The Common Vulnerabilities and Exposures (CVE) project has assigned CVE-2010-2580 for the vulnerabilities. ====================================================================== 9) About Secunia Secunia offers vulnerability management solutions to corporate customers with verified and reliable vulnerability intelligence relevant to their specific system configuration: http://secunia.com/advisories/business_solutions/ Secunia also provides a publicly accessible and comprehensive advisory database as a service to the security community and private individuals, who are interested in or concerned about IT-security. http://secunia.com/advisories/ Secunia believes that it is important to support the community and to do active vulnerability research in order to aid improving the security and reliability of software in general: http://secunia.com/secunia_research/ Secunia regularly hires new skilled team members. Check the URL below to see currently vacant positions: http://secunia.com/corporate/jobs/ Secunia offers a FREE mailing list called Secunia Security Advisories: http://secunia.com/advisories/mailing_lists/ ====================================================================== 10) Verification Please verify this advisory by visiting the Secunia website: http://secunia.com/secunia_research/2010-112/ Complete list of vulnerability reports published by Secunia Research: http://secunia.com/secunia_research/ ======================================================================