Information Gathering / Exposed Network Ports
Exposed network ports are one of the most common vulnerabilities in IT infrastructure. It occurs when ports on a network are left open and exposed to the public internet, allowing malicious actors to access the network without authentication. This vulnerability is described in CWE-264, Improper Control of Access to Network Ports. It is also mentioned in the OWASP Testing Guide, which states that security testers should check for open ports and unauthorized services running on them.
Exposed network ports can cause significant security risks, as they can give attackers access to the network and its resources. Furthermore, attackers can easily use the open ports to gain access to confidential data, launch attacks on other machines, or even hijack the entire system. The possible damage caused by this vulnerability ranges from minor to severe, depending on the level of access the open ports provide.
The best solution for exposed network ports is to ensure that all ports are properly closed and the necessary security measures are in place. Firewalls can be used to block unwanted traffic from entering the network, and authentication systems can be used to restrict access to specific users. Additionally, security teams should regularly monitor the system for new ports or services that have been opened.
A public security incident related to exposed network ports is CVE-2020-0601, a Windows code-signing vulnerability. In this incident, attackers were able to exploit an exposed port on the Windows Update server to execute malicious code. This allowed attackers to gain access to the server and launch attacks on connected machines, resulting in a breach of sensitive data.