Kerio MailServer IMAP Server Crafted LOGIN Command DoS

high Nessus Plugin ID 21050
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote IMAP server is prone to denial of service attacks.

Description

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

The installed version of Kerio MailServer terminates abnormally when it receives certain malformed IMAP LOGIN commands. An unauthenticated, remote attacker can exploit this issue to deny access to legitimate users.

Note that the application may not terminate immediately but only after an administrator acknowledges a console message.

Solution

Upgrade to Kerio MailServer 6.1.3 Patch 1 or later.

See Also

http://www.kerio.com/kms_history.html

https://seclists.org/fulldisclosure/2006/Mar/701

Plugin Details

Severity: High

ID: 21050

File Name: kerio_kms_imap_login_dos.nasl

Version: 1.21

Type: remote

Published: 3/13/2006

Updated: 11/15/2018

Dependencies: find_service1.nasl, imap_overflow.nasl

Risk Information

VPR

Risk Factor: Low

Score: 3.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: cpe:2.3:a:kerio:kerio_mailserver:*:*:*:*:*:*:*:*

Excluded KB Items: imap/false_imap, imap/overflow

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 3/9/2006

Reference Information

CVE: CVE-2006-1158

BID: 17043