Kerio MailServer < 6.3.1 Long LDAP Query DoS

medium Nessus Plugin ID 23868


The remote LDAP server is prone to a denial of service attack.


The remote host is running Kerio MailServer, a commercial mail server available for Windows, Linux, and Mac OS X platforms.

According to its banner, the LDAP service associated with the installed version of Kerio MailServer terminates abnormally when it receives certain malformed LDAP search requests. An unauthenticated, remote attacker can exploit this issue to deny access to legitimate users.


Upgrade to Kerio MailServer 6.3.1 or later.

See Also

Plugin Details

Severity: Medium

ID: 23868

File Name: kerio_kms_631.nasl

Version: 1.16

Type: remote

Published: 12/15/2006

Updated: 4/11/2022

Configuration: Enable thorough checks

Supported Sensors: Nessus

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Vulnerability Information

CPE: cpe:/a:kerio:personal_mailserver

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 12/13/2006

Reference Information

CVE: CVE-2006-6554

BID: 21091