OpenSMTPD TLS Blocking Socket Remote DoS

medium Nessus Plugin ID 66586
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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: 1.5

Type: remote

Published: 5/24/2013

Updated: 2/24/2021

Dependencies: smtp_starttls.nasl, find_service1.nasl, smtpserver_detect.nasl

Risk Information

CVSS Score Source: CVE-2013-2125


Risk Factor: Low

Score: 3.6


Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

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

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