Mercury SMTP Server AUTH CRAM-MD5 Remote Buffer Overflow

high Nessus Plugin ID 25928
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The remote mail server is affected by a buffer overflow vulnerability.


The remote host is running the Mercury Mail Transport System, a free suite of server products for Windows and NetWare associated with Pegasus Mail.

The version of Mercury Mail installed on the remote host includes an SMTP server that is affected by a buffer overflow flaw. Using a specially crafted 'AUTH CRAM-MD5' request, an unauthenticated, remote attacker can leverage this issue to crash the remote application and even execute arbitrary code remotely, subject to the privileges under which the application runs.


Upgrade to Mercury/32 v4.52 or later or apply the 4.01c / 1.49 security patch.

See Also

Plugin Details

Severity: High

ID: 25928

File Name: mercury_smtp_auth_cram_md5_overflow.nasl

Version: 1.19

Type: remote

Published: 8/23/2007

Updated: 8/22/2018

Dependencies: smtpserver_detect.nasl

Risk Information


Risk Factor: High

Score: 7


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.2

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

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Exploitable With

Core Impact

Metasploit (Mercury Mail SMTP AUTH CRAM-MD5 Buffer Overflow)

Reference Information

CVE: CVE-2007-4440

BID: 25357

EDB-ID: 4294

CWE: 119