Ruby: Denial of Service vulnerability
Gentoo Linux Security Advisory
||GLSA 200612-21 / ruby
||December 20, 2006
||December 20, 2006: 01
All supported architectures
The Ruby cgi.rb CGI library is vulnerable to a Denial of Service attack.
Ruby is a dynamic, open source programming language with a focus on
simplicity and productivity.
The read_multipart function of the CGI library shipped with Ruby
(cgi.rb) does not properly check boundaries in MIME multipart content.
This is a different issue than GLSA 200611-12.
The vulnerability can be exploited by sending the cgi.rb library a
crafted HTTP request with multipart MIME encoding that contains a
malformed MIME boundary specifier. Successful exploitation of the
vulnerability causes the library to go into an infinite loop.
There is no known workaround at this time.
All Ruby users should upgrade to the latest version:
Code Listing 3.1: Resolution
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-lang/ruby-1.8.5_p2"