GLSA 200612-21: Ruby: Denial of Service vulnerability

http://security.gentoo.org/

Severity:	normal
Title:	Ruby: Denial of Service vulnerability
Date:	12/20/2006
Bugs:	#157048
ID:	200612-21

Synopsis

The Ruby cgi.rb CGI library is vulnerable to a Denial of Service attack.

Background

Ruby is a dynamic, open source programming language with a focus on simplicity and productivity.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
dev-lang/ruby	< 1.8.5_p2	>= 1.8.5_p2	All supported architectures

Description

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.

Impact

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.

Workaround

There is no known workaround at this time.

Resolution

All Ruby users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-lang/ruby-1.8.5_p2"

References

CVE-2006-6303

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200612-21.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.