CSM Mail Server MTA 'HELO' DoS

high Nessus Plugin ID 10050


The remote SMTP server has a buffer overflow vulnerability.


The remote SMTP server is vulnerable to a buffer overflow attack. This issue is triggered by issuing the 'HELO' command followed by a long argument. A remote attacker could exploit this to crash the server, or possibly execute arbitrary code.


Contact your vendor for a patch.

Plugin Details

Severity: High

ID: 10050

File Name: csm_helo.nasl

Version: 1.39

Type: remote

Published: 1/3/2000

Updated: 7/9/2018

Configuration: Enable paranoid mode

Risk Information


Risk Factor: Medium

Score: 5.9


Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

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

Vulnerability Information

Required KB Items: Settings/ParanoidReport

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 12/29/1999

Reference Information

CVE: CVE-2000-0042

BID: 895