CVE-2017-17742

Name of the Vulnerable Software and Affected Versions Ruby versions prior to 2.2.10 Ruby versions 2.3.x prior to 2.3.7 Ruby versions 2.4.x prior to 2.4.4 Ruby versions 2.5.x prior to 2.5.1 Ruby version 2.6.0-preview1

Description The issue is related to the WEBrick library in the Ruby programming language, specifically concerning the handling of CRLF sequences in HTTP headers. This can allow an attacker to inject crafted HTTP headers, potentially leading to an HTTP Response Splitting attack. An attacker can exploit this by injecting a crafted key and value into an HTTP response for the HTTP server of WEBrick.

Recommendations For Ruby versions prior to 2.2.10, update to version 2.2.10 or later. For Ruby versions 2.3.x prior to 2.3.7, update to version 2.3.7 or later. For Ruby versions 2.4.x prior to 2.4.4, update to version 2.4.4 or later. For Ruby versions 2.5.x prior to 2.5.1, update to version 2.5.1 or later. For Ruby version 2.6.0-preview1, update to a later version.