OpenSSH < 6.2 DoS

medium Nessus Network Monitor Plugin ID 701164


The remote SSH server may be affected by a Denial-of-Service (DoS) vulnerability.


The default configuration of OpenSSH prior to 6.2 enforces a fixed time limit between establishing a TCP connection and completing a login, which makes it easier for remote attackers to cause a denial of service (connection-slot exhaustion) by periodically making many new TCP connections.


Upgrade to OpenSSH 6.2 or later.

See Also

Plugin Details

Severity: Medium

ID: 701164

Family: SSH

Published: 8/21/2019

Updated: 8/21/2019

Nessus ID: 67140

Risk Information


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


Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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

Vulnerability Information

CPE: cpe:/a:openbsd:openssh

Patch Publication Date: 3/22/2013

Vulnerability Publication Date: 2/6/2013

Reference Information

CVE: CVE-2010-5107

BID: 58162