Linux Kernel Netfilter nf_conntrack IPv6 Packet Reassembly Rule Bypass Vulnerability

BID:23976

Info

Linux Kernel Netfilter nf_conntrack IPv6 Packet Reassembly Rule Bypass Vulnerability

Bugtraq ID: 23976
Class: Design Error
CVE: CVE-2007-1497
Remote: Yes
Local: No
Published: Mar 13 2007 12:00AM
Updated: Oct 16 2007 03:07PM
Credit: Patrick McHardy is credited with the discovery of this issue.
Vulnerable: Ubuntu Ubuntu Linux 7.04 sparc
Ubuntu Ubuntu Linux 7.04 powerpc
Ubuntu Ubuntu Linux 7.04 i386
Ubuntu Ubuntu Linux 7.04 amd64
Ubuntu Ubuntu Linux 6.10 sparc
Ubuntu Ubuntu Linux 6.10 powerpc
Ubuntu Ubuntu Linux 6.10 i386
Ubuntu Ubuntu Linux 6.10 amd64
Ubuntu Ubuntu Linux 6.06 LTS sparc
Ubuntu Ubuntu Linux 6.06 LTS powerpc
Ubuntu Ubuntu Linux 6.06 LTS i386
Ubuntu Ubuntu Linux 6.06 LTS amd64
SuSE Linux 10.0 x86-64
SuSE Linux 10.0 x86
SuSE Linux 10.0 ppc
S.u.S.E. openSUSE 10.2
S.u.S.E. Open-Enterprise-Server 0
S.u.S.E. Novell Linux POS 9
S.u.S.E. Novell Linux Desktop 9
S.u.S.E. Linux Professional 10.0 OSS
S.u.S.E. Linux Professional 10.0
S.u.S.E. Linux Personal 10.0 OSS
Redhat Enterprise Linux Desktop Workstation 5 client
Redhat Enterprise Linux Desktop 5 client
Redhat Enterprise Linux 5 Server
Pardus Linux 2007.1
Mandriva Linux Mandrake 2007.1 x86_64
Mandriva Linux Mandrake 2007.1
Mandriva Linux Mandrake 2007.0 x86_64
Mandriva Linux Mandrake 2007.0
MandrakeSoft Corporate Server 4.0 x86_64
MandrakeSoft Corporate Server 4.0
Linux kernel 2.6.20 .1
Linux kernel 2.6.20
Linux kernel 2.6.20
Linux kernel 2.6.19 .2
Linux kernel 2.6.19 .1
Linux kernel 2.6.19 .1
Linux kernel 2.6.19 -rc4
Linux kernel 2.6.19 -rc3
Linux kernel 2.6.19 -rc2
+ Trustix Secure Enterprise Linux 2.0
+ Trustix Secure Linux 2.2
+ Trustix Secure Linux 2.1
+ Trustix Secure Linux 2.0
Linux kernel 2.6.19 -rc1
Linux kernel 2.6.19
Linux kernel 2.6.18 .4
Linux kernel 2.6.18 .3
Linux kernel 2.6.18 .1
Linux kernel 2.6.18
Linux kernel 2.6.17 .9
Linux kernel 2.6.17 .8
Linux kernel 2.6.17 .7
Linux kernel 2.6.17 .6
Linux kernel 2.6.17 .5
Linux kernel 2.6.17 .4
Linux kernel 2.6.17 .3
Linux kernel 2.6.17 .2
Linux kernel 2.6.17 .14
Linux kernel 2.6.17 .13
Linux kernel 2.6.17 .12
Linux kernel 2.6.17 .11
Linux kernel 2.6.17 .10
Linux kernel 2.6.17 .1
Linux kernel 2.6.17 -rc5
Linux kernel 2.6.17
Linux kernel 2.6.17
Linux kernel 2.6.17
Linux kernel 2.6.17
Linux kernel 2.6.16 27
Linux kernel 2.6.16 13
Linux kernel 2.6.16 .9
Linux kernel 2.6.16 .8
Linux kernel 2.6.16 .7
Linux kernel 2.6.16 .5
Linux kernel 2.6.16 .4
Linux kernel 2.6.16 .3
Linux kernel 2.6.16 .23
Linux kernel 2.6.16 .21
Linux kernel 2.6.16 .2
Linux kernel 2.6.16 .19
Linux kernel 2.6.16 .18
Linux kernel 2.6.16 .17
Linux kernel 2.6.16 .16
Linux kernel 2.6.16 .12
Linux kernel 2.6.16 .11
Linux kernel 2.6.16 .1
Linux kernel 2.6.16 -rc1
Linux kernel 2.6.16
Linux kernel 2.6.16
Linux kernel 2.6.15 .6
Linux kernel 2.6.15 .4
Linux kernel 2.6.15 .3
Linux kernel 2.6.15 .2
Linux kernel 2.6.15 .1
Linux kernel 2.6.15 -rc6
Linux kernel 2.6.15 -rc5
Linux kernel 2.6.15 -rc4
Linux kernel 2.6.15 -rc3
Linux kernel 2.6.15 -rc2
Linux kernel 2.6.15 -rc1
Linux kernel 2.6.15
Linux kernel 2.6.15
+ Trustix Secure Enterprise Linux 2.0
+ Trustix Secure Linux 2.2
+ Trustix Secure Linux 2.1
+ Trustix Secure Linux 2.0
Linux kernel 2.6.14 .5
Linux kernel 2.6.14 .4
Linux kernel 2.6.14 .3
Linux kernel 2.6.14 .2
Linux kernel 2.6.14 .1
Linux kernel 2.6.14 -rc4
Linux kernel 2.6.14 -rc3
Linux kernel 2.6.14 -rc2
Linux kernel 2.6.14 -rc1
Linux kernel 2.6.14
Linux kernel 2.6.14
Linux kernel 2.6.13 .4
Linux kernel 2.6.13 .3
Linux kernel 2.6.13 .2
Linux kernel 2.6.13 .1
Linux kernel 2.6.13 -rc7
Linux kernel 2.6.13 -rc6
Linux kernel 2.6.13 -rc4
Linux kernel 2.6.13 -rc1
Linux kernel 2.6.13
Linux kernel 2.6.13
+ Trustix Secure Enterprise Linux 2.0
+ Trustix Secure Linux 2.2
+ Trustix Secure Linux 2.1
+ Trustix Secure Linux 2.0
Linux kernel 2.6.12 .6
Linux kernel 2.6.12 .5
Linux kernel 2.6.12 .4
Linux kernel 2.6.12 .3
Linux kernel 2.6.12 .22
Linux kernel 2.6.12 .2
Linux kernel 2.6.12 .12
Linux kernel 2.6.12 .1
Linux kernel 2.6.12 -rc5
Linux kernel 2.6.12 -rc4
Linux kernel 2.6.12 -rc1
Linux kernel 2.6.12
Linux kernel 2.6.12
Linux kernel 2.6.11 .8
Linux kernel 2.6.11 .7
Linux kernel 2.6.11 .6
Linux kernel 2.6.11 .5
Linux kernel 2.6.11 .4
Linux kernel 2.6.11 .12
Linux kernel 2.6.11 .11
Linux kernel 2.6.11 -rc4
Linux kernel 2.6.11 -rc3
Linux kernel 2.6.11 -rc2
Linux kernel 2.6.11
Linux kernel 2.6.11
+ Trustix Secure Enterprise Linux 2.0
+ Trustix Secure Linux 2.2
+ Trustix Secure Linux 2.1
+ Trustix Secure Linux 2.0
Linux kernel 2.6.10 rc2
Linux kernel 2.6.10
+ Redhat Fedora Core3
 + Redhat Fedora Core2
 + Trustix Secure Linux 3.0
+ Ubuntu Ubuntu Linux 5.0 4 powerpc
 + Ubuntu Ubuntu Linux 5.0 4 i386
 + Ubuntu Ubuntu Linux 5.0 4 amd64
 Linux kernel 2.6.10
Linux kernel 2.6.9
Linux kernel 2.6.8 rc3
Linux kernel 2.6.8 rc2
Linux kernel 2.6.8 rc1
+ Ubuntu Ubuntu Linux 4.1 ppc
 + Ubuntu Ubuntu Linux 4.1 ia64
 + Ubuntu Ubuntu Linux 4.1 ia32
 Linux kernel 2.6.8
Linux kernel 2.6.7 rc1
Linux kernel 2.6.7
Linux kernel 2.6.6 rc1
Linux kernel 2.6.6
Linux kernel 2.6.5
Linux kernel 2.6.4
Linux kernel 2.6.3
Linux kernel 2.6.2
Linux kernel 2.6.1 -rc2
Linux kernel 2.6.1 -rc1
Linux kernel 2.6.1
Linux kernel 2.6 .10
Linux kernel 2.6 -test9-CVS
Linux kernel 2.6 -test9
Linux kernel 2.6 -test8
Linux kernel 2.6 -test7
Linux kernel 2.6 -test6
Linux kernel 2.6 -test5
Linux kernel 2.6 -test4
Linux kernel 2.6 -test3
Linux kernel 2.6 -test2
Linux kernel 2.6 -test11
Linux kernel 2.6 -test10
Linux kernel 2.6 -test1
Linux kernel 2.6
Linux kernel 2.6.8.1
+ S.u.S.E. Linux Personal 9.2 x86_64
 + S.u.S.E. Linux Personal 9.2
+ Ubuntu Ubuntu Linux 4.1 ppc
 + Ubuntu Ubuntu Linux 4.1 ia64
 + Ubuntu Ubuntu Linux 4.1 ia32
 Linux kernel 2.6.20.2
Linux kernel 2.6.20-rc2
Linux kernel 2.6.20-2
Linux kernel 2.6.18
Linux kernel 2.6.15.5
Linux kernel 2.6.15.11
Linux kernel 2.6.11.4
Debian Linux 4.0 sparc
Debian Linux 4.0 s/390
Debian Linux 4.0 powerpc
Debian Linux 4.0 mipsel
Debian Linux 4.0 mips
Debian Linux 4.0 m68k
Debian Linux 4.0 ia-64
Debian Linux 4.0 ia-32
Debian Linux 4.0 hppa
Debian Linux 4.0 arm
Debian Linux 4.0 amd64
Debian Linux 4.0 alpha
Debian Linux 4.0
Not Vulnerable: Linux kernel 2.6.20.3

Discussion

Linux Kernel Netfilter nf_conntrack IPv6 Packet Reassembly Rule Bypass Vulnerability

The Linux kernel is prone to a vulnerability that lets attackers bypass firewall rules. This issue occurs because the Linux 'netfilter' code fails to properly classify network packets.

Successfully exploiting this issue allows attackers to bypass firewall rules, potentially aiding them in further network-based attacks.

Linux kernel versions in the 2.6 series prior to 2.6.20.3 are vulnerable to this issue.

Exploit / POC

Linux Kernel Netfilter nf_conntrack IPv6 Packet Reassembly Rule Bypass Vulnerability

Attackers use readily available network utilities to exploit this issue.

Solution / Fix

Linux Kernel Netfilter nf_conntrack IPv6 Packet Reassembly Rule Bypass Vulnerability

Solution:
The vendor has addressed this issue in version 2.6.20.3. Please see the references for more information.


Linux kernel 2.6.20.2

Linux kernel 2.6.11.4

Linux kernel 2.6.20-rc2

Linux kernel 2.6.8.1

Linux kernel 2.6 -test6

Linux kernel 2.6 -test4

Linux kernel 2.6 -test2

Linux kernel 2.6 -test9-CVS

Linux kernel 2.6 -test7

Linux kernel 2.6 -test9

Linux kernel 2.6 -test10

Linux kernel 2.6.1 -rc2

Linux kernel 2.6.1

Linux kernel 2.6.10 rc2

Linux kernel 2.6.10

Linux kernel 2.6.11

Linux kernel 2.6.11 -rc3

Linux kernel 2.6.11 .11

Linux kernel 2.6.11 .7

Linux kernel 2.6.12 .4

Linux kernel 2.6.12 .1

Linux kernel 2.6.12 -rc4

Linux kernel 2.6.12 .12

Linux kernel 2.6.12 .22

Linux kernel 2.6.12 .2

Linux kernel 2.6.13 -rc4

Linux kernel 2.6.13

Linux kernel 2.6.14 .4

Linux kernel 2.6.14 .1

Linux kernel 2.6.14 .3

Linux kernel 2.6.15 -rc6

Linux kernel 2.6.15

Linux kernel 2.6.15

Linux kernel 2.6.15 -rc1

Linux kernel 2.6.15 -rc3

Linux kernel 2.6.15 .4

Linux kernel 2.6.15 -rc4

Linux kernel 2.6.15 .6

Linux kernel 2.6.16 .3

Linux kernel 2.6.16 .9

Linux kernel 2.6.16 .5

Linux kernel 2.6.16 .1

Linux kernel 2.6.16 .23

Linux kernel 2.6.16 -rc1

Linux kernel 2.6.16

Linux kernel 2.6.16 27

Linux kernel 2.6.17

Linux kernel 2.6.17 .5

Linux kernel 2.6.17 .1

Linux kernel 2.6.17 .7

Linux kernel 2.6.17 .13

Linux kernel 2.6.17 .10

Linux kernel 2.6.17 .9

Linux kernel 2.6.17 -rc5

Linux kernel 2.6.18 .3

Linux kernel 2.6.19 -rc2

Linux kernel 2.6.2

Linux kernel 2.6.20

Linux kernel 2.6.3

Linux kernel 2.6.4

Linux kernel 2.6.6 rc1

Linux kernel 2.6.7

Linux kernel 2.6.8 rc2

Linux kernel 2.6.8 rc1

Linux kernel 2.6.9

References

Linux Kernel Netfilter nf_conntrack IPv6 Packet Reassembly Rule Bypass Vulnerability

References:
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