[gentoo-announce] [ GLSA 201001-09 ] Ruby: Terminal Control Character Injection

[news 28]

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Gentoo Linux Security Advisory GLSA 201001-09

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http://security.gentoo.org/

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Severity: Normal

Title: Ruby: Terminal Control Character Injection

Date: January 14, 2010

Bugs: #300468

ID: 201001-09

 

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Synopsis

========

 

An input sanitation flaw in the WEBrick HTTP server included in Ruby

might allow remote attackers to inject arbitrary control characters

into terminal sessions.

 

Background

==========

 

Ruby is an interpreted scripting language for quick and easy

object-oriented programming. It comes bundled with a HTTP server

("WEBrick").

 

Affected packages

=================

 

-------------------------------------------------------------------

Package / Vulnerable / Unaffected

-------------------------------------------------------------------

1 dev-lang/ruby < 1.8.7_p249 >= 1.8.7_p249

*>= 1.8.6_p388

 

Description

===========

 

Giovanni Pellerano, Alessandro Tanasi and Francesco Ongaro reported

that WEBrick does not filter terminal control characters, for instance

when handling HTTP logs.

 

Impact

======

 

A remote attacker could send a specially crafted HTTP request to a

WEBrick server to inject arbitrary terminal control characters,

possibly resulting in the execution of arbitrary commands, data loss,

or other unspecified impact. This could also be used to facilitate

other attacks.

 

Workaround

==========

 

There is no known workaround at this time.

 

Resolution

==========

 

All Ruby 1.8.7 users should upgrade to the latest version:

 

# emerge --sync

# emerge --ask --oneshot --verbose ">=dev-lang/ruby-1.8.7_p249"

 

All Ruby 1.8.6 users should upgrade to the latest version:

 

# emerge --sync

# emerge --ask --oneshot --verbose ">=dev-lang/ruby-1.8.6_p388"

 

References

==========

 

[ 1 ] CVE-2009-4492

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-4492

 

Availability

============

 

This GLSA and any updates to it are available for viewing at

the Gentoo Security Website:

 

http://security.gentoo.org/glsa/glsa-201001-09.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 ( -at -) gentoo.org or alternatively, you may file a bug at

https://bugs.gentoo.org.

 

License

=======

 

Copyright 2010 Gentoo Foundation, Inc; referenced text

belongs to its owner(s).

 

The contents of this document are licensed under the

Creative Commons - Attribution / Share Alike license.

 

http://creativecommons.org/licenses/by-sa/2.5