OpenSMTPD TLS Blocking Socket Remote DoS

This script is Copyright (C) 2013 Tenable Network Security, Inc.


Synopsis :

The remote mail server is affected by a denial of service
vulnerability.

Description :

The remote OpenSMTPD mail server has a flaw that could result in
further connections to it being blocked when a client holds open a TLS
connection.

See also :

http://www.opensmtpd.org/announces/release-5.3.2.txt
http://www.nessus.org/u?fab189bb

Solution :

Either apply the patch or upgrade to OpenSMTPD 5.3.2 or later.

Risk factor :

Medium / CVSS Base Score : 5.0
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P)
CVSS Temporal Score : 4.1
(CVSS2#E:F/RL:OF/RC:C)
Public Exploit Available : true

Family: SMTP problems

Nessus Plugin ID: 66586 ()

Bugtraq ID: 59985

CVE ID: CVE-2013-2125