MailEnable Professional NTLM denial of service

mailenable-ntlm-dos (32482) The risk level is classified as MediumMedium Risk

Description:

MailEnable Professional is vulnerable to a denial of service, caused by an error in the NTLM_UnPack_Type3 function of the MENTLM.dll file. A remote attacker could exploit this vulnerability by sending a AUTHENTICATE NTLM command followed by specially-crafted base64-encoded data to cause the IMAP or POP service to crash.

*CVSS:

Base Score: 3.5
  Access Vector: Remote
  Access Complexity: Low
  Authentication: Not Required
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Partial
 
Temporal Score: 3
  Exploitability: Proof-Of-Concept
  Remediation Level: Unavailable
  Report Confidence: Uncorroborated

Consequences:

Denial of Service

Remedy:

Upgrade to the latest version of MailEnable (2.351 or later), available from the MailEnable Web site. See References.

References:

  • Full-Disclosure Mailing List, Wed Feb 14 2007 - 04:14:14 CST: MailEnable DoS POC.
  • MailEnable Web site: MailEnable Downloads.
  • BID-22565: MailEnable SMTP NTLM Authentication Unspecified Denial of Service Vulnerability
  • CVE-2007-0955: The NTLM_UnPack_Type3 function in MENTLM.dll in MailEnable Professional 2.35 and earlier allows remote attackers to cause a denial of service (application crash) via certain base64-encoded data following an AUTHENTICATE NTLM command to the imap port (143/tcp), which results in an out-of-bounds read.
  • OSVDB ID: 33195: MailEnable MENTLM.dll NTLM AUTHENTICATE NTLM Command DoS
  • SA24139: MailEnable NTLM Authentication Denial of Service

Platforms Affected:

  • MailEnable MailEnable 2.35 and prior Professional
  • MailEnable MailEnable 2.35 and prior Enterprise

Reported:

Feb 14, 2007

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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