Title: MIT Kerberos 5 Telnet Daemon Authentication Bypass Vulnerability
Severity: CRITICAL
Description:
MIT Kerberos 5 is a suite of applications and libraries designed to implement the Kerberos network-authentication protocol. It is freely available and operates on numerous platforms.
MIT Kerberos 5 is prone to an authentication-bypass vulnerability because it fails to handle specially crafted usernames beginning with '-e'. The application interprets '-e' as a login.krb5 command-line flag, which is executed by telnetd. This will cause login.krb5 to execute a portion of the BSD rlogin protocol with an arbitrary username. An attacker may then gain access to affected computers without requiring a password.
An attacker can exploit this issue to gain superuser or SYSTEM-level privileges on the affected computer. Successfully exploiting this issue will result in the complete compromise of affected computers.
This issue occurs in Kerberos 5 versions 1.6 and prior.
Affected Products:
- Conectiva Linux 8.0.0
- 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
- MIT Kerberos 5 1.0.0
- MIT Kerberos 5 1.0.6
- MIT Kerberos 5 1.0.8
- MIT Kerberos 5 1.1.0
- MIT Kerberos 5 1.1.1
- MIT Kerberos 5 1.2.0
- MIT Kerberos 5 1.2.1
- MIT Kerberos 5 1.2.2
- MIT Kerberos 5 1.2.2 -beta1
- MIT Kerberos 5 1.2.3
- MIT Kerberos 5 1.2.4
- MIT Kerberos 5 1.2.5
- MIT Kerberos 5 1.2.6
- MIT Kerberos 5 1.2.7
- MIT Kerberos 5 1.2.8
- MIT Kerberos 5 1.3.0
- MIT Kerberos 5 1.3.0 -alpha1
- MIT Kerberos 5 1.3.1
- MIT Kerberos 5 1.3.2
- MIT Kerberos 5 1.3.3
- MIT Kerberos 5 1.3.4
- MIT Kerberos 5 1.3.5
- MIT Kerberos 5 1.3.6
- MIT Kerberos 5 1.4.0
- MIT Kerberos 5 1.4.1
- MIT Kerberos 5 1.4.2
- MIT Kerberos 5 1.4.3
- MIT Kerberos 5 1.5.0
- MIT Kerberos 5 1.5.1
- MIT Kerberos 5 1.6.0
- MIT Kerberos 5 5.0.0 -1.0.x
- MIT Kerberos 5 5.0.0 -1.1
- MIT Kerberos 5 5.0.0 -1.1.1
- MIT Kerberos 5 5.0.0 -1.2beta1
- MIT Kerberos 5 5.0.0 -1.2beta2
- MIT Kerberos 5 5.0.0 -1.3.3
- MIT Kerberos 5 5.0.0 -1.3.4
- MIT Kerberos 5 5.0.0 -1.3.5
- MIT Kerberos 5 5.0.0 -1.3.6
- MIT Kerberos 5 5.0.0 -1.4
- MIT Kerberos 5 5.0.0 -1.4.1
- MandrakeSoft Corporate Server 2.1.0
- MandrakeSoft Corporate Server 2.1.0 x86_64
- MandrakeSoft Linux Mandrake 10.0.0
- MandrakeSoft Linux Mandrake 10.0.0 amd64
- MandrakeSoft Linux Mandrake 10.1.0
- MandrakeSoft Linux Mandrake 10.1.0 x86_64
- MandrakeSoft Linux Mandrake 2007.1
- MandrakeSoft Linux Mandrake 2007.1 x86_64
- MandrakeSoft Linux Mandrake 8.1.0
- MandrakeSoft Linux Mandrake 8.1.0 ia64
- MandrakeSoft Linux Mandrake 8.2.0
- MandrakeSoft Linux Mandrake 8.2.0 ppc
- MandrakeSoft Linux Mandrake 9.0.0
- MandrakeSoft Linux Mandrake 9.1.0
- MandrakeSoft Linux Mandrake 9.1.0 ppc
- MandrakeSoft Linux Mandrake 9.2.0
- MandrakeSoft Linux Mandrake 9.2.0 amd64
- MandrakeSoft Multi Network Firewall 2.0.0
- OpenBSD OpenBSD 3.1
- OpenBSD OpenBSD 3.2
- Pardus Linux 2007.1
- RedHat Desktop 4.0.0
- RedHat Enterprise Linux AS 4
- RedHat Enterprise Linux ES 4
- RedHat Enterprise Linux WS 4
- RedHat Fedora Core1
- RedHat Fedora Core2
- RedHat Fedora Core3
- RedHat Linux 6.2.0
- RedHat Linux 6.2.0 alpha
- RedHat Linux 6.2.0 i386
- RedHat Linux 6.2.0 sparc
- RedHat Linux 7.0.0
- RedHat Linux 7.0.0 alpha
- RedHat Linux 7.0.0 i386
- RedHat Linux 7.1.0
- RedHat Linux 7.1.0 alpha
- RedHat Linux 7.1.0 i386
- RedHat Linux 7.1.0 ia64
- RedHat Linux 7.2.0
- RedHat Linux 7.2.0 i386
- RedHat Linux 7.2.0 ia64
- RedHat Linux 7.3.0
- RedHat Linux 7.3.0 i386
- RedHat Linux 8.0.0
- RedHat Linux 8.0.0 i386
- RedHat Linux 9.0.0 i386
- 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 9.3 x86
- S.u.S.E. Linux 9.3 x86-64
- S.u.S.E. SUSE Linux Enterprise Desktop 10
- S.u.S.E. SUSE Linux Enterprise Server 10
- S.u.S.E. openSUSE 10.2
- SGI ProPack 3.0.0 SP6
- Sun SEAM 1.0.0
- Sun SEAM 1.0.1
- Sun SEAM 1.0.2
- Sun Solaris 2.6
- Sun Solaris 2.6_x86
- Sun Solaris 7.0
- Sun Solaris 7.0_x86
- Sun Solaris 8
- Sun Solaris 8_x86
- Sun Solaris 9
- Sun Solaris 9_x86
- Trustix Operating System Enterprise Server 2.0
- Trustix Secure Enterprise Linux 2.0.0
- Trustix Secure Linux 2.1.0
- Trustix Secure Linux 2.2.0
- Trustix Secure Linux 3.0.0
- Trustix Secure Linux 3.0.5
- Turbolinux Appliance Server 1.0.0 Hosting Edition
- Turbolinux Appliance Server 1.0.0 Workgroup Edition
- Turbolinux Appliance Server 2.0
- Turbolinux Appliance Server Hosting Edition 1.0.0
- Turbolinux Appliance Server Workgroup Edition 1.0.0
- Turbolinux Home
- Turbolinux Multimedia
- Turbolinux Personal
- Turbolinux Turbolinux 10 F...
- Turbolinux Turbolinux Desktop 10.0.0
- Turbolinux Turbolinux Server 10.0.0
- Turbolinux Turbolinux Server 10.0.0 x64
- Turbolinux Turbolinux Server 8.0.0
- Turbolinux Turbolinux Server 8.0.0
- Ubuntu Ubuntu Linux 5.10.0 amd64
- Ubuntu Ubuntu Linux 5.10.0 i386
- Ubuntu Ubuntu Linux 5.10.0 powerpc
- Ubuntu Ubuntu Linux 5.10.0 sparc
- 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
- WireX Immunix OS 7+
- rPath rPath Linux 1
References:
- CERT: VU#220816: MIT Kerberos 5 telnet daemon allows login as arbitrary user
- MIT: Kerberos Homepage
- MIT: MIT krb5 Security Advisory 2007-001
- RedHat: krb5 security update
- Sun: Sun Alert ID: 102867 - Security Vulnerability in the SEAM Kerberized telnetd(1M)
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