CVE-2021-33621: HTTP response splitting in CGI
We have released the cgi gem version 0.3.5, 0.2.2, and 0.1.0.2 that has a security fix for a HTTP response splitting vulnerability.
This vulnerability has been assigned the CVE identifier CVE-2021-33621.
If an application that generates HTTP responses using the cgi gem with untrusted user input, an attacker can exploit it to inject a malicious HTTP response header and/or body.
Also, the contents for a CGI::Cookie object were not checked properly. If an application creates a CGI::Cookie object based on user input, an attacker may exploit it to inject invalid attributes in Set-Cookie header. We think such applications are unlikely, but we have included a change to check arguments for CGI::Cookie#initialize preventatively.
Please update the cgi gem to version 0.3.5, 0.2.2, and 0.1.0.2, or later. You can use gem update cgi to update it.
If you are using bundler, please add gem "cgi", ">= 0.3.5" to your Gemfile.
cgi gem 0.3.3 or before
cgi gem 0.2.1 or before
cgi gem 0.1.1 or 0.1.0.1 or 0.1.0
Thanks to Hiroshi Tokumaru for discovering this issue.
Originally published at 2022-11-22 02:00:00 (UTC)
Posted by mame on 22 Nov 2022
Ruby，一种简单快捷的面向对象（面向对象程序设计）脚本语言，在20世纪90年代由日本人松本行弘(Yukihiro Matsumoto)开发，遵守GPL协议和Ruby License.