CVE-2006-1206

Matt Johnston Dropbear SSH server <0.47 - DoS

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2006-1206. PoCs published by str0ke.

AI-analyzed exploit summary This exploit targets a denial-of-service vulnerability in Dropbear/OpenSSH servers by exhausting the MAX_UNAUTH_CLIENTS limit. It opens multiple TCP connections to the target server and holds them for a specified duration, preventing new connections.

Description

Matt Johnston Dropbear SSH server 0.47 and earlier, as used in embedded Linux devices and on general-purpose operating systems, allows remote attackers to cause a denial of service (connection slot exhaustion) via a large number of connection attempts that exceeds the MAX_UNAUTH_CLIENTS defined value of 30.

Exploits (1)

exploitdb WORKING POC VERIFIED
by str0ke · perldosmultiple
https://www.exploit-db.com/exploits/1572

This exploit targets a denial-of-service vulnerability in Dropbear/OpenSSH servers by exhausting the MAX_UNAUTH_CLIENTS limit. It opens multiple TCP connections to the target server and holds them for a specified duration, preventing new connections.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Dropbear/OpenSSH Server (versions affected by CVE-2006-1206)
No auth needed
Prerequisites: Network access to the target server · Target server must be running a vulnerable version of Dropbear/OpenSSH
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/426999/100/0/threaded
Patch, Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/17024
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://securitytracker.com/id?1015742

Scores

EPSS 0.1167
EPSS Percentile 95.5%

Details

Status published
Products (1)
dropbear_ssh_project/dropbear_ssh < 0.47
Published Mar 14, 2006
Tracked Since Feb 18, 2026