Linux Kernel NFS ReadLink Remote Denial of Service Vulnerability

BID:20186

Info

Linux Kernel NFS ReadLink Remote Denial of Service Vulnerability

Bugtraq ID: 20186
Class: Failure to Handle Exceptional Conditions
CVE: CVE-2005-4798
Remote: Yes
Local: No
Published: Sep 12 2005 12:00AM
Updated: Dec 18 2006 09:23PM
Credit: Assar <[email protected]> discovered this issue.
Vulnerable: SuSE Linux Openexchange Server
S.u.S.E. Linux Professional 10.0 OSS
S.u.S.E. Linux Professional 10.0
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 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 10.1
S.u.S.E. Linux Office Server
S.u.S.E. Linux Enterprise Server for S/390 9.0
S.u.S.E. Linux Enterprise Server for S/390
Linux kernel 2.4.31
Linux kernel 2.4.30 rc3
Linux kernel 2.4.30 rc2
Linux kernel 2.4.30
+ Trustix Secure Linux 2.2
+ Trustix Secure Linux 2.1
Linux kernel 2.4.29 -rc2
Linux kernel 2.4.29 -rc1
Linux kernel 2.4.29
Linux kernel 2.4.28
+ Trustix Secure Enterprise Linux 2.0
+ Trustix Secure Linux 2.2
+ Trustix Secure Linux 2.1
+ Trustix Secure Linux 2.0
Linux kernel 2.4.27 -pre5
Linux kernel 2.4.27 -pre4
Linux kernel 2.4.27 -pre3
Linux kernel 2.4.27 -pre2
Linux kernel 2.4.27 -pre1
Linux kernel 2.4.27
Linux kernel 2.4.26
Linux kernel 2.4.25
Linux kernel 2.4.24 -ow1
Linux kernel 2.4.24
Linux kernel 2.4.23 -pre9
Linux kernel 2.4.23 -ow2
Linux kernel 2.4.23
+ Trustix Secure Linux 2.0
Linux kernel 2.4.22
+ Devil-Linux Devil-Linux 1.0.5
+ Devil-Linux Devil-Linux 1.0.4
+ Mandriva Linux Mandrake 9.2 amd64
 + Mandriva Linux Mandrake 9.2
+ Redhat Fedora Core1
 + Slackware Linux 9.1
Linux kernel 2.4.21 pre7
Linux kernel 2.4.21 pre4
+ Mandriva Linux Mandrake 9.1 ppc
 + Mandriva Linux Mandrake 9.1
Linux kernel 2.4.21 pre1
Linux kernel 2.4.21
+ Mandriva Linux Mandrake 9.1 ppc
 + Mandriva Linux Mandrake 9.1
+ Redhat Desktop 3.0
+ Redhat Enterprise Linux AS 3
 + Redhat Enterprise Linux ES 3
 + Redhat Enterprise Linux WS 3
 + S.u.S.E. Linux Personal 9.0 x86_64
 + S.u.S.E. Linux Personal 9.0
+ SuSE SUSE Linux Enterprise Server 8
 Linux kernel 2.4.20
Linux kernel 2.4.19 -pre6
Linux kernel 2.4.19 -pre5
Linux kernel 2.4.19 -pre4
Linux kernel 2.4.19 -pre3
Linux kernel 2.4.19 -pre2
Linux kernel 2.4.19 -pre1
Linux kernel 2.4.19
+ Conectiva Linux Enterprise Edition 1.0
+ MandrakeSoft Corporate Server 2.1 x86_64
 + MandrakeSoft Corporate Server 2.1
+ MandrakeSoft Multi Network Firewall 2.0
+ Mandriva Linux Mandrake 9.0
+ Slackware Linux -current
 + SuSE Linux 8.1
+ SuSE SUSE Linux Enterprise Server 8
 + SuSE SUSE Linux Enterprise Server 7
 Linux kernel 2.4.18 pre-8
Linux kernel 2.4.18 pre-7
Linux kernel 2.4.18 pre-6
Linux kernel 2.4.18 pre-5
Linux kernel 2.4.18 pre-4
Linux kernel 2.4.18 pre-3
Linux kernel 2.4.18 pre-2
Linux kernel 2.4.18 pre-1
Linux kernel 2.4.18 x86
+ Debian Linux 3.0 ia-32
 Linux kernel 2.4.18
+ Astaro Security Linux 2.0 23
 + Astaro Security Linux 2.0 16
 + 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
 + Mandriva Linux Mandrake 8.2
+ Mandriva Linux Mandrake 8.1
+ Mandriva Linux Mandrake 8.0
+ Redhat Advanced Workstation for the Itanium Processor 2.1 IA64
 + Redhat Advanced Workstation for the Itanium Processor 2.1
+ Redhat Enterprise Linux AS 2.1 IA64
 + Redhat Linux 8.0
+ Redhat Linux 7.3
+ S.u.S.E. Linux Connectivity Server
+ S.u.S.E. Linux Database Server 0
 + S.u.S.E. Linux Firewall on CD
+ S.u.S.E. Linux Office Server
+ S.u.S.E. Linux Personal 8.2
+ S.u.S.E. SuSE eMail Server 3.1
+ S.u.S.E. SuSE eMail Server III
+ SuSE Linux 8.1
+ SuSE Linux 8.0
+ SuSE Linux 7.3
+ SuSE Linux 7.2
+ SuSE Linux 7.1
+ SuSE Linux Openexchange Server
+ SuSE SUSE Linux Enterprise Server 8
 + SuSE SUSE Linux Enterprise Server 7
 + Turbolinux Turbolinux Server 8.0
+ Turbolinux Turbolinux Server 7.0
+ Turbolinux Turbolinux Workstation 8.0
+ Turbolinux Turbolinux Workstation 7.0
Linux kernel 2.4.17
Linux kernel 2.4.16
+ Sun Cobalt RaQ 550
Linux kernel 2.4.15
Linux kernel 2.4.14
Linux kernel 2.4.13
+ Caldera OpenLinux Server 3.1.1
+ Caldera OpenLinux Workstation 3.1.1
Linux kernel 2.4.12
Linux kernel 2.4.11
Linux kernel 2.4.10
Linux kernel 2.4.3
+ Mandriva Linux Mandrake 8.0 ppc
 + Mandriva Linux Mandrake 8.0
Linux kernel 2.4.2
Linux kernel 2.4.1
Linux kernel 2.4 .0-test9
Linux kernel 2.4 .0-test8
Linux kernel 2.4 .0-test7
Linux kernel 2.4 .0-test6
Linux kernel 2.4 .0-test5
Linux kernel 2.4 .0-test4
Linux kernel 2.4 .0-test3
Linux kernel 2.4 .0-test2
Linux kernel 2.4 .0-test12
Linux kernel 2.4 .0-test11
Linux kernel 2.4 .0-test10
Linux kernel 2.4 .0-test1
Linux kernel 2.4
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: Linux kernel 2.4.32

Discussion

Linux Kernel NFS ReadLink Remote Denial of Service Vulnerability

The Linux kernel is prone to a remote denial-of-service vulnerability because the NFS client code fails to properly handle unexpected conditions.

Attackers controlling malicious NFS servers -- or performing man-in-the-middle attacks between NFS client and server computers -- may cause vulnerable NFS client computers to crash.

Linux kernel versions 2.4 through 2.4.31 are vulnerable to this issue.

Exploit / POC

Linux Kernel NFS ReadLink Remote Denial of Service Vulnerability

Attackers use standard NFS server software to exploit this issue.

Solution / Fix

Linux Kernel NFS ReadLink Remote Denial of Service Vulnerability

Solution:
The vendor has released version 2.4.32 of the Linux kernel to address this issue.

Please see the references for more information.


Linux kernel 2.4 .0-test3

Linux kernel 2.4 .0-test6

Linux kernel 2.4 .0-test8

Linux kernel 2.4 .0-test7

Linux kernel 2.4

Linux kernel 2.4 .0-test2

Linux kernel 2.4 .0-test11

Linux kernel 2.4 .0-test10

Linux kernel 2.4 .0-test4

Linux kernel 2.4 .0-test1

Linux kernel 2.4 .0-test5

Linux kernel 2.4 .0-test12

Linux kernel 2.4.1

Linux kernel 2.4.11

Linux kernel 2.4.12

Linux kernel 2.4.13

Linux kernel 2.4.14

Linux kernel 2.4.15

Linux kernel 2.4.16

Linux kernel 2.4.17

Linux kernel 2.4.18 pre-8

Linux kernel 2.4.18 pre-7

Linux kernel 2.4.18

Linux kernel 2.4.18 pre-6

Linux kernel 2.4.18 pre-3

Linux kernel 2.4.18 pre-2

Linux kernel 2.4.18 pre-4

Linux kernel 2.4.18 pre-5

Linux kernel 2.4.18 x86

Linux kernel 2.4.18 pre-1

Linux kernel 2.4.19 -pre4

Linux kernel 2.4.19 -pre1

Linux kernel 2.4.19 -pre6

Linux kernel 2.4.19 -pre2

Linux kernel 2.4.19

Linux kernel 2.4.19 -pre5

Linux kernel 2.4.19 -pre3

Linux kernel 2.4.21

Linux kernel 2.4.21 pre1

Linux kernel 2.4.21 pre4

Linux kernel 2.4.22

Linux kernel 2.4.23

Linux kernel 2.4.23 -ow2

Linux kernel 2.4.23 -pre9

Linux kernel 2.4.24

Linux kernel 2.4.24 -ow1

Linux kernel 2.4.25

Linux kernel 2.4.27 -pre1

Linux kernel 2.4.27

Linux kernel 2.4.27 -pre2

Linux kernel 2.4.27 -pre4

Linux kernel 2.4.27 -pre3

Linux kernel 2.4.28

Linux kernel 2.4.29 -rc2

Linux kernel 2.4.29 -rc1

Linux kernel 2.4.29

Linux kernel 2.4.3

Linux kernel 2.4.30

Linux kernel 2.4.30 rc3

Linux kernel 2.4.30 rc2

Linux kernel 2.4.31

References

Linux Kernel NFS ReadLink Remote Denial of Service Vulnerability

References:

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