Rack Rack::Request Cross-Site Scripting Vulnerability [CVE-2018-16471 ]
CVE Number – CVE-2018-16471
A vulnerability in Rack could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user on a targeted system.The vulnerability exists because the affected software performs insufficient escaping of the content returned by the scheme method in the Rack::Request class. An attacker could exploit this vulnerability by persuading a targeted user to follow a link that sends a crafted request to the targeted system. A successful exploit could allow the attacker to conduct an XSS attack, which could be used to execute arbitrary script code or access sensitive information on the system.Rack has confirmed the vulnerability and released software updates.
Analysis
- To exploit the vulnerability, the attacker may use misleading language or instructions to persuade a user to follow a malicious link.
Safeguards
- Administrators are advised to apply the appropriate updates.Administrators are advised to allow only trusted users to have network access.Users are advised not to open email messages from suspicious or unrecognized sources. If users cannot verify that links or attachments included in email messages are safe, they are advised not to open them.Users are advised not to visit websites or follow links that have suspicious characteristics or cannot be verified as safe.Administrators are advised to use an unprivileged account when browsing the Internet.Administrators are advised to monitor critical systems.
Vendor Announcements
- Rack has released a security announcement at the following link: [CVE-2018-16471] Possible XSS vulnerability in Rack
Fixed Software
- Rack has released software updates at the following link: Rack releases
Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.