vpopmail SMTP AUTH and APOP authentication bypass

vpopmail-auth-bypass (26333) The risk level is classified as MediumMedium Risk

Description:

vpopmail could allow a remote attacker to bypass authentication. If cleartext passwords are enabled, a remote attacker could authenticate with SMTP AUTH and APOP methods using a blank password, if the targeted account does not have a cleartext password set.


Consequences:

Bypass Security

Remedy:

Upgrade to the latest version of vpopmail (5.4.16 or later), available from SourceForge.net. See References.

References:

  • SourceForge.net: Files: vpopmail - virtual domains for qmail - File Release Notes and Changelog - Release Name: 5.4.16.
  • BID-17894: Inter7 Vpopmail Authentication Bypass Vulnerability
  • CVE-2006-2346: vpopmail 5.4.14 and 5.4.15, with cleartext passwords enabled, allows remote attackers to authenticate to an account that does not have a cleartext password set by using a blank password to (1) SMTP AUTH or (2) APOP.
  • OSVDB ID: 25445: vpopmail Cleartext Password Authentication Bypass
  • SA19987: vpopmail Cleartext Password Authentication Bypass

Platforms Affected:

  • Inter7 vpopmail prior to 5.4.16

Reported:

May 07, 2006

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