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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200812-17">
<title>Ruby: Multiple vulnerabilities</title>
<synopsis>
Multiple vulnerabilities have been discovered in Ruby that allow for
attacks including arbitrary code execution and Denial of Service.
</synopsis>
<product type="ebuild">ruby</product>
<announced>December 16, 2008</announced>
<revised>December 16, 2008: 01</revised>
<bug>225465</bug>
<bug>236060</bug>
<access>remote</access>
<affected>
<package name="dev-lang/ruby" auto="yes" arch="*">
<unaffected range="ge">1.8.6_p287-r1</unaffected>
<vulnerable range="lt">1.8.6_p287-r1</vulnerable>
</package>
</affected>
<background>
<p>
Ruby is an interpreted object-oriented programming language. The
elaborate standard library includes an HTTP server ("WEBRick") and a
class for XML parsing ("REXML").
</p>
</background>
<description>
<p>
Multiple vulnerabilities have been discovered in the Ruby interpreter
and its standard libraries. Drew Yao of Apple Product Security
discovered the following flaws:
</p>
<ul>
<li>Arbitrary code execution
or Denial of Service (memory corruption) in the rb_str_buf_append()
function (CVE-2008-2662).</li>
<li>Arbitrary code execution or Denial
of Service (memory corruption) in the rb_ary_stor() function
(CVE-2008-2663).</li>
<li>Memory corruption via alloca in the
rb_str_format() function (CVE-2008-2664).</li>
<li>Memory corruption
("REALLOC_N") in the rb_ary_splice() and rb_ary_replace() functions
(CVE-2008-2725).</li>
<li>Memory corruption ("beg + rlen") in the
rb_ary_splice() and rb_ary_replace() functions (CVE-2008-2726).</li>
</ul> <p>
Furthermore, several other vulnerabilities have been reported:
</p>
<ul>
<li>Tanaka Akira reported an issue with resolv.rb that enables
attackers to spoof DNS responses (CVE-2008-1447).</li>
<li>Akira Tagoh
of RedHat discovered a Denial of Service (crash) issue in the
rb_ary_fill() function in array.c (CVE-2008-2376).</li>
<li>Several
safe level bypass vulnerabilities were discovered and reported by Keita
Yamaguchi (CVE-2008-3655).</li>
<li>Christian Neukirchen is credited
for discovering a Denial of Service (CPU consumption) attack in the
WEBRick HTTP server (CVE-2008-3656).</li>
<li>A fault in the dl module
allowed the circumvention of taintness checks which could possibly lead
to insecure code execution was reported by "sheepman"
(CVE-2008-3657).</li>
<li>Tanaka Akira again found a DNS spoofing
vulnerability caused by the resolv.rb implementation using poor
randomness (CVE-2008-3905).</li>
<li>Luka Treiber and Mitja Kolsek
(ACROS Security) disclosed a Denial of Service (CPU consumption)
vulnerability in the REXML module when dealing with recursive entity
expansion (CVE-2008-3790).</li>
</ul>
</description>
<impact type="normal">
<p>
These vulnerabilities allow remote attackers to execute arbitrary code,
spoof DNS responses, bypass Ruby's built-in security and taintness
checks, and cause a Denial of Service via crash or CPU exhaustion.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All Ruby users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-lang/ruby-1.8.6_p287-r1"</code>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1447">CVE-2008-1447</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2376">CVE-2008-2376</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2662">CVE-2008-2662</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2663">CVE-2008-2663</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2664">CVE-2008-2664</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2725">CVE-2008-2725</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2726">CVE-2008-2726</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3655">CVE-2008-3655</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3656">CVE-2008-3656</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3657">CVE-2008-3657</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3790">CVE-2008-3790</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3905">CVE-2008-3905</uri>
</references>
<metadata tag="requester" timestamp="Sun, 21 Sep 2008 11:43:41 +0000">
keytoaster
</metadata>
<metadata tag="submitter" timestamp="Mon, 10 Nov 2008 18:52:14 +0000">
hoffie
</metadata>
<metadata tag="bugReady" timestamp="Thu, 27 Nov 2008 16:38:46 +0000">
rbu
</metadata>
</glsa>
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