Check Point Advisories

OpenSSH maxstartup Threshold Connection Exhaustion denial of service (CVE-2010-5107)

Check Point Reference: CPAI-2013-3512
Date Published: 28 Jan 2014
Severity: Critical
Last Updated: Wednesday 22 January, 2025
Source: CVE-2010-5107
Protection Provided by:

Security Gateway
R75
Who is Vulnerable? OpenSSH OpenSSH 6.1 and prior
Vulnerability Description A denial of service vulnerability exists in the OpenSSH server daemon (sshd). The vulnerability is due to a default configuration that only allows a small number of unauthenticated connections, after which the server will stop accepting any new connections. A remote unauthenticated attacker can exploit this vulnerability by creating a large number of connections to the SSH server, consuming all available connection slots. Repeated exploitation could result in a denial of service condition.

Protection Overview

This protection will detect and block attempts to exploit this vulnerability.

In order for the protection to be activated, update your product to the latest update. For information on how to update , go to SBP-2006-05, Protection tab and select the version of your choice.

Security Gateway R75 / R71 / R70

  1. In the IPS tab, click Protections and find the OpenSSH maxstartup Threshold Connection Exhaustion denial of service protection using the Search tool and Edit the protection's settings.
  2. Install policy on all modules.

SmartView Tracker will log the following entries:
Attack Name: SSH Protection Violation
Attack Information: OpenSSH maxstartup Threshold Connection Exhaustion denial of service

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