Title: Ruby Multiple Libraries SSL Multiple Insecure Certificate Validation Weaknesses
Severity: MODERATE
Description:
Ruby includes multiple 'net::' libraries that implement a variety of net-related functionality.
Ruby is prone to multiple weaknesses related to its validation of certificates. The problem is that multiple libraries fail to properly perform validity checks on X.509 certificates. The following libraries are affected:
net::ftptls
net::telnets
net::imap
CVS versions of net::pop and net::smtp
By default, the libraries fail to validate that the Common Name (CN) of SSL X.509 certificates matches the hostname that a library is connecting to. The library expects users to call the 'post_connection_check' method on SSL connections to perform this check, but documentation on this method is unavailable at this time.
These issues present themselves despite applications that use the OpenSSL 'verify_mode' option of 'OpenSSL::SSL::VERIFY_PEER', but may not affect the 'open-uri' form of initiating remote connections.
Given the lack of documentation, applications that use these libraries for SSL connections may not properly perform validation checks on certificates presented by servers.
Successfully exploiting these issues may allow attackers to perform man-in-the-middle attacks against applications that insecurely use an affected library. Other attacks may also be possible.
NOTE: These issues are related to a weakness covered by BID 25847 (Ruby Net::HTTP SSL Insecure Certificate Validation Weakness).
Affected Products:
- Apple Mac OS X 10.4.11
- Apple Mac OS X 10.5.1
- Apple Mac OS X Server 10.4.11
- Apple Mac OS X Server 10.5.1
- Debian Linux 3.0.0
- Debian Linux 3.0.0 alpha
- Debian Linux 3.0.0 arm
- Debian Linux 3.0.0 hppa
- Debian Linux 3.0.0 ia-32
- Debian Linux 3.0.0 ia-64
- Debian Linux 3.0.0 m68k
- Debian Linux 3.0.0 mips
- Debian Linux 3.0.0 mipsel
- Debian Linux 3.0.0 ppc
- Debian Linux 3.0.0 s/390
- Debian Linux 3.0.0 sparc
- Debian Linux 3.1.0
- Debian Linux 3.1.0 alpha
- Debian Linux 3.1.0 amd64
- Debian Linux 3.1.0 arm
- Debian Linux 3.1.0 hppa
- Debian Linux 3.1.0 ia-32
- Debian Linux 3.1.0 ia-64
- Debian Linux 3.1.0 m68k
- Debian Linux 3.1.0 mips
- Debian Linux 3.1.0 mipsel
- Debian Linux 3.1.0 ppc
- Debian Linux 3.1.0 s/390
- Debian Linux 3.1.0 sparc
- Debian Linux 4.0
- Debian Linux 4.0 alpha
- Debian Linux 4.0 amd64
- Debian Linux 4.0 arm
- Debian Linux 4.0 hppa
- Debian Linux 4.0 ia-32
- Debian Linux 4.0 ia-64
- Debian Linux 4.0 m68k
- Debian Linux 4.0 mips
- Debian Linux 4.0 mipsel
- Debian Linux 4.0 powerpc
- Debian Linux 4.0 s/390
- Debian Linux 4.0 sparc
- Gentoo Linux
- Linux kernel 2.4.19
- Linux kernel 2.4.21
- MandrakeSoft Corporate Server 3.0.0
- MandrakeSoft Corporate Server 3.0.0 x86_64
- MandrakeSoft Corporate Server 4.0
- MandrakeSoft Corporate Server 4.0.0 x86_64
- MandrakeSoft Linux Mandrake 2007.0
- MandrakeSoft Linux Mandrake 2007.0 x86_64
- MandrakeSoft Linux Mandrake 2007.1
- MandrakeSoft Linux Mandrake 2007.1 x86_64
- MandrakeSoft Linux Mandrake 2008.0
- MandrakeSoft Linux Mandrake 2008.0 x86_64
- Novell Linux Desktop 9
- Novell Linux POS 9
- RedHat Desktop 4.0.0
- RedHat Enterprise Linux 5 server
- RedHat Enterprise Linux AS 4
- RedHat Enterprise Linux Desktop 5 client
- RedHat Enterprise Linux Desktop Workstation 5 client
- RedHat Enterprise Linux ES 4
- RedHat Enterprise Linux WS 4
- RedHat Fedora Core2
- RedHat Fedora Core3
- RedHat Fedora Core4
- S.u.S.E. Linux 10.0 ppc
- S.u.S.E. Linux 10.0 x86
- S.u.S.E. Linux 10.0 x86-64
- S.u.S.E. Linux 10.1 ppc
- S.u.S.E. Linux 10.1 x86
- S.u.S.E. Linux 10.1 x86-64
- S.u.S.E. Linux Enterprise Server 10.SP1
- S.u.S.E. Linux Enterprise Server 8
- S.u.S.E. Open-Enterprise-Server
- S.u.S.E. SUSE LINUX Retail Solution 8.0.0
- S.u.S.E. SUSE Linux Enterprise Desktop 10 SP1
- S.u.S.E. SUSE Linux Enterprise Server 10 SP1
- S.u.S.E. SuSE Linux Openexchange Server 4.0.0
- S.u.S.E. SuSE Linux School Server for i386
- S.u.S.E. SuSE Linux Standard Server 8.0.0
- S.u.S.E. UnitedLinux 1.0.0
- S.u.S.E. openSUSE 10.2
- S.u.S.E. openSUSE 10.3
- Ubuntu Ubuntu Linux 4.1.0 ia32
- Ubuntu Ubuntu Linux 4.1.0 ia64
- Ubuntu Ubuntu Linux 4.1.0 ppc
- Ubuntu Ubuntu Linux 5.0.0 4 amd64
- Ubuntu Ubuntu Linux 5.0.0 4 i386
- Ubuntu Ubuntu Linux 5.0.0 4 powerpc
- Ubuntu Ubuntu Linux 6.06 LTS amd64
- Ubuntu Ubuntu Linux 6.06 LTS i386
- Ubuntu Ubuntu Linux 6.06 LTS powerpc
- Ubuntu Ubuntu Linux 6.06 LTS sparc
- Ubuntu Ubuntu Linux 6.10 amd64
- Ubuntu Ubuntu Linux 6.10 i386
- Ubuntu Ubuntu Linux 6.10 powerpc
- Ubuntu Ubuntu Linux 6.10 sparc
- Ubuntu Ubuntu Linux 7.04 amd64
- Ubuntu Ubuntu Linux 7.04 i386
- Ubuntu Ubuntu Linux 7.04 powerpc
- Ubuntu Ubuntu Linux 7.04 sparc
- Ubuntu Ubuntu Linux 7.10 amd64
- Ubuntu Ubuntu Linux 7.10 i386
- Ubuntu Ubuntu Linux 7.10 powerpc
- Ubuntu Ubuntu Linux 7.10 sparc
- Yukihiro Matsumoto Ruby 1.6.0
- Yukihiro Matsumoto Ruby 1.6.7
- Yukihiro Matsumoto Ruby 1.6.8
- Yukihiro Matsumoto Ruby 1.8.0
- Yukihiro Matsumoto Ruby 1.8.1
- Yukihiro Matsumoto Ruby 1.8.2
- Yukihiro Matsumoto Ruby 1.8.2 pre1
- Yukihiro Matsumoto Ruby 1.8.2 pre2
- Yukihiro Matsumoto Ruby 1.8.2 pre3
- Yukihiro Matsumoto Ruby 1.8.2 pre4
- Yukihiro Matsumoto Ruby 1.8.3
- Yukihiro Matsumoto Ruby 1.8.4
- Yukihiro Matsumoto Ruby 1.8.5
- Yukihiro Matsumoto Ruby 1.8.5-p2
- Yukihiro Matsumoto Ruby 1.8.6
References:
- Red Hat: RHSA-2007:0961-4 Moderate: ruby security update
- Red Hat: RHSA-2007:0965-3 Moderate: ruby security update
- Ruby: Revision 13656
- Yukihiro Matsumoto: Ruby Homepage
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