Vulnerability Assessment & Network Security Forums



If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important.  If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.


Home >> Browse Vulnerability Assessment Database >> Denial of Service >> Dropbear Authorization-Pending Denial of Service Vulnerability


Vulnerability Assessment Details

Dropbear Authorization-Pending Denial of Service Vulnerability

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

Detailed Explanation for this Vulnerability Assessment

Summary :

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.

Network Security Threat Level:

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

Networks Security ID: 17024

Vulnerability Assessment Copyright: This script is Copyright (C) 2006 Tenable Network Security

Cables, Connectors

HP ProLiant DL380 G7 Server 2x 2.40Ghz E5620 QC 64GB Mid-Level
$320.1
HP ProLiant DL380 G7 Server 2x 2.40Ghz E5620 QC 64GB  Mid-Level pictureIntel PRO/1000 MF FC Gigabit NIC C41300 Dual Port Network Server Adapter
$3.91
Intel PRO/1000 MF FC Gigabit NIC C41300 Dual Port Network Server Adapter pictureSAMSUNG 128GB 8x16GB DDR3-1600MHZ PC3L-12800R 1.35V ECC REG Server Memory Ram
$515.99
SAMSUNG 128GB 8x16GB DDR3-1600MHZ PC3L-12800R 1.35V ECC REG Server Memory Ram picture


Discussions

No Discussions have been posted on this vulnerability.