Multiple Vendor C Library realpath() Off-By-One Buffer Overflow Vulnerability

BID:8315

Info

Multiple Vendor C Library realpath() Off-By-One Buffer Overflow Vulnerability

Bugtraq ID: 8315
Class: Boundary Condition Error
CVE: CVE-2003-0466
Remote: Yes
Local: No
Published: Jul 31 2003 12:00AM
Updated: May 15 2007 07:08PM
Credit: Discovery of this vulnerability has been credited to Janusz Niewiadomski <[email protected]> and Wojciech Purczynski <[email protected]>.
Vulnerable: Washington University wu-ftpd 2.6.2
+ Compaq Tru64 5.1 b PK2 (BL22)
 + Compaq Tru64 5.1 b PK1 (BL1)
 + Compaq Tru64 5.1 b
 + Compaq Tru64 5.1 a PK5 (BL23)
 + Compaq Tru64 5.1 a PK4 (BL21)
 + Compaq Tru64 5.1 a PK3 (BL3)
 + Compaq Tru64 5.1 a PK2 (BL2)
 + Compaq Tru64 5.1 a PK1 (BL1)
 + Compaq Tru64 5.1 a
 + Compaq Tru64 5.1 PK6 (BL20)
 + Compaq Tru64 5.1 PK5 (BL19)
 + Compaq Tru64 5.1 PK4 (BL18)
 + Compaq Tru64 5.1 PK3 (BL17)
 + Compaq Tru64 5.1
+ Compaq Tru64 5.0 f
 + Compaq Tru64 5.0 a PK3 (BL17)
 + Compaq Tru64 5.0 a
 + Compaq Tru64 5.0 PK4 (BL18)
 + Compaq Tru64 5.0 PK4 (BL17)
 + Compaq Tru64 5.0
+ Compaq Tru64 4.0 g PK3 (BL17)
 + Compaq Tru64 4.0 g
 + Compaq Tru64 4.0 f PK7 (BL18)
 + Compaq Tru64 4.0 f PK6 (BL17)
 + Compaq Tru64 4.0 f
 + Compaq Tru64 4.0 e
 + Compaq Tru64 4.0 d PK9 (BL17)
 + Compaq Tru64 4.0 d
 + Compaq Tru64 4.0 b
 + 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
+ Mandriva Linux Mandrake 8.2 ppc
 + Mandriva Linux Mandrake 8.2
+ SCO Open Server 5.0.7
+ SCO Open Server 5.0.6 a
 + SCO Open Server 5.0.6
+ Sun Linux 5.0.7
+ Turbolinux Turbolinux Advanced Server 6.0
+ Turbolinux Turbolinux Server 6.1
+ Turbolinux Turbolinux Workstation 6.0
Washington University wu-ftpd 2.6.1
+ Caldera OpenLinux 2.3
+ Caldera OpenLinux Server 3.1
+ Cobalt Qube 1.0
- FreeBSD FreeBSD 5.0 alpha
 - FreeBSD FreeBSD 5.0
- FreeBSD FreeBSD 4.4
- FreeBSD FreeBSD 4.3 -STABLE
 - FreeBSD FreeBSD 4.3 -RELEASE
 - FreeBSD FreeBSD 4.3
+ MandrakeSoft Corporate Server 1.0.1
+ Mandriva Linux Mandrake 8.1
+ Mandriva Linux Mandrake 8.0 ppc
 + Mandriva Linux Mandrake 8.0
+ Mandriva Linux Mandrake 7.2
+ Mandriva Linux Mandrake 7.1
+ Mandriva Linux Mandrake 7.0
+ Mandriva Linux Mandrake 6.1
+ Mandriva Linux Mandrake 6.0
+ Redhat Linux 7.2 noarch
 + Redhat Linux 7.2 ia64
 + Redhat Linux 7.2 i686
 + Redhat Linux 7.2 i586
 + Redhat Linux 7.2 i386
 + Redhat Linux 7.2 athlon
 + Redhat Linux 7.2 alpha
 + Redhat Linux 7.1 noarch
 + Redhat Linux 7.1 ia64
 + Redhat Linux 7.1 i686
 + Redhat Linux 7.1 i586
 + Redhat Linux 7.1 i386
 + Redhat Linux 7.1 alpha
 + Redhat Linux 7.0 sparc
 + Redhat Linux 7.0 i386
 + Redhat Linux 7.0 alpha
 + SCO eDesktop 2.4
+ SCO eServer 2.3.1
+ SCO Open Server 5.0.6 a
 + SCO Open Server 5.0.6
+ SCO Open Server 5.0.5
+ SCO Open Server 5.0.4
+ SCO Open Server 5.0.3
+ SCO Open Server 5.0.2
+ SCO Open Server 5.0.1
+ SCO Open Server 5.0
- Slackware Linux 8.0
- Slackware Linux 7.1
- Slackware Linux 7.0
- SuSE Linux 7.3
- SuSE Linux 7.2
- SuSE Linux 7.1 x86
 - SuSE Linux 7.1 sparc
 - SuSE Linux 7.1 ppc
 - SuSE Linux 7.1 alpha
 - SuSE Linux 7.1
- SuSE Linux 7.0 sparc
 - SuSE Linux 7.0 ppc
 - SuSE Linux 7.0 alpha
 - SuSE Linux 7.0
+ Turbolinux Turbolinux 6.0.5
+ Turbolinux Turbolinux 6.0.4
+ Turbolinux Turbolinux 6.0.3
+ Turbolinux Turbolinux 6.0.2
+ Turbolinux Turbolinux 6.0.1
+ Turbolinux Turbolinux 6.0
+ Turbolinux Turbolinux Workstation 6.1
+ Wirex Immunix OS 7.0 -Beta
 + Wirex Immunix OS 7.0
+ Wirex Immunix OS 7+
 Washington University wu-ftpd 2.6 .0
+ Cobalt Qube 1.0
+ Debian Linux 2.2 sparc
 + Debian Linux 2.2 powerpc
 + Debian Linux 2.2 arm
 + Debian Linux 2.2 alpha
 + Debian Linux 2.2 68k
 + Debian Linux 2.2
- FreeBSD FreeBSD 4.4
- FreeBSD FreeBSD 4.3 -STABLE
 - FreeBSD FreeBSD 4.3 -RELEASE
 - FreeBSD FreeBSD 4.3
+ HP HP-UX 11.11
+ HP HP-UX 11.0
+ Redhat Linux 6.2 sparc
 + Redhat Linux 6.2 i386
 + Redhat Linux 6.2 alpha
 + Redhat Linux 6.1 sparc
 + Redhat Linux 6.1 i386
 + Redhat Linux 6.1 alpha
 + Redhat Linux 6.0 sparc
 + Redhat Linux 6.0 alpha
 + Redhat Linux 6.0
+ Redhat Linux 5.2 sparc
 + Redhat Linux 5.2 i386
 + Redhat Linux 5.2 alpha
 + SuSE Linux 7.3 sparc
 + SuSE Linux 7.3 ppc
 + SuSE Linux 7.3 i386
 + SuSE Linux 7.2 i386
 + SuSE Linux 7.1 x86
 + SuSE Linux 7.1 sparc
 + SuSE Linux 7.1 ppc
 + SuSE Linux 7.1 alpha
 + SuSE Linux 7.0 sparc
 + SuSE Linux 7.0 ppc
 + SuSE Linux 7.0 i386
 + SuSE Linux 7.0 alpha
 + SuSE Linux 6.4 ppc
 + SuSE Linux 6.4 alpha
 + SuSE Linux 6.4
+ SuSE Linux 6.3 ppc
 + SuSE Linux 6.3 alpha
 + SuSE Linux 6.3
+ SuSE Linux 6.2
+ SuSE Linux 6.1 alpha
 + SuSE Linux 6.1
+ Turbolinux Turbolinux 4.0
+ Wirex Immunix OS 6.2
Washington University wu-ftpd 2.5 .0
+ Caldera OpenLinux 2.4
+ Caldera OpenLinux Desktop 2.3
+ Redhat Linux 6.0 sparc
 + Redhat Linux 6.0 alpha
 + Redhat Linux 6.0
+ SCO eDesktop 2.4
+ SCO eServer 2.3.1
+ SCO eServer 2.3
Sun Solaris 9_x86
Sun Solaris 9
SSH Communications Security SSH2 3.2.9 .1
Redhat wu-ftpd-2.6.2-8.i386.rpm
+ Redhat Linux 8.0 i386
 Redhat wu-ftpd-2.6.2-5.i386.rpm
+ Redhat Linux 7.3 i386
 Redhat wu-ftpd-2.6.1-18.ia64.rpm
+ Redhat Linux 7.2 ia64
 Redhat wu-ftpd-2.6.1-18.i386.rpm
+ Redhat Linux 7.2 i386
 Redhat wu-ftpd-2.6.1-16.ppc.rpm
+ Redhat Linux 7.1 pseries
 + Redhat Linux 7.1 iseries
 Redhat wu-ftpd-2.6.1-16.i386.rpm
+ Redhat Linux 7.1 i386
 OpenBSD OpenBSD 2.9
OpenBSD OpenBSD 2.8
OpenBSD OpenBSD 2.7
OpenBSD OpenBSD 2.6
OpenBSD OpenBSD 2.5
OpenBSD OpenBSD 2.4
OpenBSD OpenBSD 2.3
OpenBSD OpenBSD 2.2
OpenBSD OpenBSD 2.1
OpenBSD OpenBSD 2.0
OpenBSD OpenBSD 3.3
OpenBSD OpenBSD 3.2
OpenBSD OpenBSD 3.1
OpenBSD OpenBSD 3.0
NetBSD NetBSD 1.6.1
NetBSD NetBSD 1.6
NetBSD NetBSD 1.5.3
NetBSD NetBSD 1.5.2
NetBSD NetBSD 1.5.1
NetBSD NetBSD 1.5
HP HP-UX 11.22
HP HP-UX 11.11
HP HP-UX 11.0
FreeBSD FreeBSD 5.0 alpha
FreeBSD FreeBSD 5.0
FreeBSD FreeBSD 4.8 -PRERELEASE
FreeBSD FreeBSD 4.8
FreeBSD FreeBSD 4.7 -STABLE
FreeBSD FreeBSD 4.7 -RELEASE
FreeBSD FreeBSD 4.7
FreeBSD FreeBSD 4.6.2
FreeBSD FreeBSD 4.6 -STABLE
FreeBSD FreeBSD 4.6 -RELEASE
FreeBSD FreeBSD 4.6
FreeBSD FreeBSD 4.5 -STABLEpre2002-03-07
FreeBSD FreeBSD 4.5 -STABLE
FreeBSD FreeBSD 4.5 -RELEASE
FreeBSD FreeBSD 4.5
FreeBSD FreeBSD 4.4 -STABLE
FreeBSD FreeBSD 4.4 -RELENG
FreeBSD FreeBSD 4.4
FreeBSD FreeBSD 4.3 -STABLE
FreeBSD FreeBSD 4.3 -RELENG
FreeBSD FreeBSD 4.3 -RELEASE
FreeBSD FreeBSD 4.3
FreeBSD FreeBSD 4.2 -STABLEpre122300
FreeBSD FreeBSD 4.2 -STABLEpre050201
FreeBSD FreeBSD 4.2 -STABLE
FreeBSD FreeBSD 4.2 -RELEASE
FreeBSD FreeBSD 4.2
FreeBSD FreeBSD 4.1.1 -STABLE
FreeBSD FreeBSD 4.1.1 -RELEASE
FreeBSD FreeBSD 4.1.1
FreeBSD FreeBSD 4.1
FreeBSD FreeBSD 4.0 .x
FreeBSD FreeBSD 4.0 alpha
FreeBSD FreeBSD 4.0
FreeBSD FreeBSD 3.5.1 -STABLEpre2001-07-20
Apple Mac OS X Server 10.2.6
Apple Mac OS X 10.2.6
Not Vulnerable:

Discussion

Multiple Vendor C Library realpath() Off-By-One Buffer Overflow Vulnerability

The 'realpath()' function is a C-library procedure to resolve the canonical, absolute pathname of a file based on a path that may contain values such as '/', './', '../', or symbolic links. A vulnerability that was reported to affect the implementation of 'realpath()' in WU-FTPD has lead to the discovery that at least one implementation of the C library is also vulnerable. FreeBSD has announced that the off-by-one stack- buffer-overflow vulnerability is present in their libc. Other systems are also likely vulnerable.

Reportedly, this vulnerability has been successfully exploited against WU-FTPD to execute arbitrary instructions.

NOTE: Patching the C library alone may not remove all instances of this vulnerability. Statically linked programs may need to be rebuilt with a patched version of the C library. Also, some applications may implement their own version of 'realpath()'. These applications would require their own patches. FreeBSD has published a large list of applications that use 'realpath()'. Administrators of FreeBSD and other systems are urged to review it. For more information, see the advisory 'FreeBSD-SA-03:08.realpath'.

Solution / Fix

Multiple Vendor C Library realpath() Off-By-One Buffer Overflow Vulnerability

Solution:
Please see the referenced vendor advisories for further information.


Redhat wu-ftpd-2.6.1-18.i386.rpm

Redhat wu-ftpd-2.6.1-16.i386.rpm

OpenBSD OpenBSD 3.2

Redhat wu-ftpd-2.6.1-16.ppc.rpm

Redhat wu-ftpd-2.6.1-18.ia64.rpm

Redhat wu-ftpd-2.6.2-8.i386.rpm

Redhat wu-ftpd-2.6.2-5.i386.rpm

Sun Solaris 9

OpenBSD OpenBSD 3.3

Sun Solaris 9_x86

NetBSD NetBSD 1.5

NetBSD NetBSD 1.5.1

NetBSD NetBSD 1.5.2

NetBSD NetBSD 1.5.3

NetBSD NetBSD 1.6

NetBSD NetBSD 1.6.1

Apple Mac OS X Server 10.2.6

Apple Mac OS X 10.2.6

Washington University wu-ftpd 2.6 .0

Washington University wu-ftpd 2.6.1

Washington University wu-ftpd 2.6.2

References

Multiple Vendor C Library realpath() Off-By-One Buffer Overflow Vulnerability

References:

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