XtraMail SMTP HELO Command Remote Overflow

critical Nessus Plugin ID 10324
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The remote host is running a mail server with a remote buffer overflow vulnerability.


The remote host is running a version of XtraMail with a remote buffer overflow vulnerability. The overflow is caused by by issuing the 'HELO' command, followed by a long argument.

The HELO command is typically one of the first commands required by a mail server. The command is used by the mail server as a first attempt to allow the client to identify itself. As such, this command occurs before there is any authentication or validation of mailboxes, etc.

This issue may allow an attacker to crash the mail server, or possibly execute arbitrary code.


Contact the vendor for a patch.

See Also


Plugin Details

Severity: Critical

ID: 10324

File Name: xtramail_helo.nasl

Version: 1.42

Type: remote

Published: 11/10/1999

Updated: 11/15/2018

Dependencies: smtpserver_detect.nasl, sendmail_expn.nasl, slmail_helo.nasl, csm_helo.nasl

Risk Information


Risk Factor: Medium

Score: 5.9


Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 11/10/1999

Reference Information

CVE: CVE-1999-1511

BID: 791