Vulnerability Scanning Solutions, LLC.
Home
Our Process
Residential
Corporate
What We Scan For
Sample Report
Client List
Terms
Contact Us
What We Scan For
Family: Denial of Service --> Category: mixed

Dropbear Authorization-Pending Denial of Service Vulnerability Vulnerability Scan


Vulnerability Scan Summary
Checks for authorization pending connection limit in Dropbear SSH server

Detailed Explanation for this Vulnerability Test

Synopsis :

The remote SSH server is susceptible to denial of service attacks.

Description :

The remote host is running Dropbear, a small, open-source SSH server.

The version of Dropbear installed on the remote host by default has a limit of
30 connections in the authorization-pending state
subsequent connections are
closed immediately. This issue can be exploited trivially by an
unauthenticated attacker to deny service to legitimate users.

See also :

http://www.securityfocus.com/archive/1/426999/30/0/threaded
http://lists.grok.org.uk/pipermail/full-disclosure/2006-March/042849.html

Solution :

Upgrade to Dropbear 0.48 or later.

Threat Level:

Low / CVSS Base Score : 2
(AV:R/AC:L/Au:NR/C:N/A:P/I:N/B:N)

Click HERE for more information and discussions on this network vulnerability scan.

VSS, LLC.

P.O. Box 827051

Pembroke Pines, FL 33082-7051

Vulnerability Scanning Solutions, LLC.