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VuXML IDDescription
84ab03b6-6c20-11ed-b519-080027f5fec9rubygem-cgi -- HTTP response splitting vulnerability

Hiroshi Tokumaru reports:

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.


Discovery 2022-11-22
Entry 2022-11-24
rubygem-cgi
< 0.3.4

ruby
ge 2.7.0,1 lt 2.7.7,1

ge 3.0.0,1 lt 3.0.5,1

ge 3.1.0,1 lt 3.1.3,1

ge 3.2.0.p1,1 lt 3.2.0.r1,1

ruby27
ge 2.7.0,1 lt 2.7.7,1

ruby30
ge 3.0.0,1 lt 3.0.5,1

ruby31
ge 3.1.0,1 lt 3.1.3,1

ruby32
ge 3.2.0.p1,1 lt 3.2.0.r1,1

CVE-2021-33621
https://www.ruby-lang.org/en/news/2022/11/22/http-response-splitting-in-cgi-cve-2021-33621/