OpenSMTPD TLS Blocking Socket Remote DoS

Medium Nessus Plugin ID 66586


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


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.


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

See Also

Plugin Details

Severity: Medium

ID: 66586

File Name: opensmtpd_tls_dos.nasl

Version: $Revision: 1.2 $

Type: remote

Published: 2013/05/24

Modified: 2017/02/08

Dependencies: 42088, 10263, 17975

Risk Information

Risk Factor: Medium


Base Score: 5

Temporal Score: 4.1

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

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

Vulnerability Information

CPE: cpe:/a:openbsd:opensmtpd

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2013/05/16

Vulnerability Publication Date: 2013/05/18

Reference Information

CVE: CVE-2013-2125

BID: 59985

OSVDB: 93495