Courier Mail Server < 0.50.1 SPF Data Lookup Remote DoS

Low Nessus Network Monitor Plugin ID 3048


The remote host is vulnerable to a Denial of Service (DoS) attack.


The remote host is running Courier Mail Server, an open source mail server for Linux and Unix. The installed version of Courier is prone to a remote denial of service vulnerability associated with Sender Policy Framework (SPF) data lookups. To exploit this flaw, an attacker would need to control a DNS server and return malicious SPF records in response to queries from the affected application.


Upgrade to version 0.50.1 or higher.

Plugin Details

Severity: Low

ID: 3048

Family: SMTP Servers

Published: 2005/07/05

Updated: 2019/03/06

Dependencies: 2004, 2005

Nessus ID: 18620

Risk Information

Risk Factor: Low

CVSS v2.0

Base Score: 2.6

Temporal Score: 1.9

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

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

CVSS v3.0

Base Score: 3.6

Temporal Score: 3.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:double_precision_incorporated:courier_mail_server

Reference Information

CVE: CVE-2005-2151

BID: 14135