E-Post IMAP APPEND denial of service

epost-imap-append-dos (24341) The risk level is classified as MediumMedium Risk


E-Post Mail Server Enterprise, E-Post Mail Server, E-Post SMTP Server Enterprise, E-Post SMTP Server, and SPA-PRO Mail @Solomon Enterprise are vulnerable to a denial of service caused by improper handling of the APPEND command in the IMAP service.. A remote attacker could send an APPEND command and terminate the connection before sending the required data to cause the IMAP service to consume a large amount of CPU resources.


Denial of Service


Apply the appropriate patch as listed in the Secunia Security Advisory: SA18480. See References.


  • E-Post Web site: E-Post Web site. (Site in Japanese)
  • BID-16379: E-Post MailServer Multiple Remote Vulnerabilities
  • CVE-2006-0449: Early termination vulnerability in the IMAP service in E-Post Mail 4.05 and SPA-PRO Mail 4.05 allows remote attackers to cause a denial of service (infinite loop) by sending an APPEND command and disconnecting before the expected amount of data is sent.
  • OSVDB ID: 22766: E-Post Multiple Products IMAP APPEND Command Infinite Loop DoS
  • SA18480: E-Post Mail Server Products Multiple Vulnerabilities

Platforms Affected:

  • e-Post E-Post Mail Server 4.10
  • e-Post E-Post Mail Server Enterprise 4.10
  • e-Post E-Post SMTP Server 4.10
  • e-Post E-Post SMTP Server Enterprise 4.10
  • e-Post SPA-PRO Mail @Solomon 4.00
  • e-Post SPA-PRO Mail @Solomon Enterprise 4.00
  • e-Post SPA-PRO SMTP @Solomon 4.00


Jan 25, 2006

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