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: 1.6

Type: remote

Published: 5/24/2013

Updated: 4/11/2022

Configuration: Enable thorough checks

Risk Information


Risk Factor: Medium

Score: 4.4


Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2013-2125

Vulnerability Information

CPE: cpe:/a:openbsd:opensmtpd

Exploit Ease: No known exploits are available

Patch Publication Date: 5/16/2013

Vulnerability Publication Date: 5/18/2013

Reference Information

CVE: CVE-2013-2125

BID: 59985