Linux Kernel IPTables Sign Error Denial Of Service Vulnerability

BID:10634

Info

Linux Kernel IPTables Sign Error Denial Of Service Vulnerability

Bugtraq ID: 10634
Class: Failure to Handle Exceptional Conditions
CVE: CVE-2004-0626
Remote: Yes
Local: No
Published: Jun 30 2004 12:00AM
Updated: Jul 12 2009 05:16AM
Credit: Discovery of this issue is credited to Adam Osuchowski <[email protected]>.
Vulnerable: SuSE SUSE Linux Enterprise Server 8
+ Linux kernel 2.4.21
+ Linux kernel 2.4.19
SuSE SUSE Linux Enterprise Server 7
+ Linux kernel 2.4.19
SuSE Linux 8.1
SuSE Linux 8.0 i386
SuSE Linux 8.0
S.u.S.E. SuSE eMail Server III
S.u.S.E. SuSE eMail Server 3.1
S.u.S.E. Office Server
S.u.S.E. Linux Personal 9.1
S.u.S.E. Linux Personal 9.0 x86_64
S.u.S.E. Linux Personal 9.0
S.u.S.E. Linux Personal 8.2
S.u.S.E. Linux Office Server
S.u.S.E. Linux Firewall on CD
S.u.S.E. Linux Database Server 0
S.u.S.E. Linux Connectivity Server
S.u.S.E. Linux Admin-CD for Firewall
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
+ S.u.S.E. Linux Personal 9.1 x86_64
 + S.u.S.E. Linux Personal 9.1 x86_64
 + S.u.S.E. Linux Personal 9.1
+ S.u.S.E. Linux Personal 9.1
+ SuSE Linux Enterprise Server 9
 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
Gentoo Linux 1.4
Not Vulnerable:

Discussion

Linux Kernel IPTables Sign Error Denial Of Service Vulnerability

It has been reported that the Linux kernel is affected by a denial of service vulnerability in the iptables implementation. This issue is due to a failure of iptables to handle certain TCP packet header values.

An attacker can exploit this issue to cause the iptables implementation to consume all CPU resources due to an infinite loop, denying service to legitimate users.

Exploit / POC

Linux Kernel IPTables Sign Error Denial Of Service Vulnerability

No exploit is required to leverage this issue. The following packet configuration has been reported to be sufficient to leverage this issue:

0x0000: 4500 0030 1234 4000 ff06 e83f c0a8 0001
0x0010: c0a8 0002 0400 1000 0000 0064 0000 0064
0x0020: 7000 0fa0 dc6a 0000 0204 05b4 0101 04fd

Solution / Fix

Linux Kernel IPTables Sign Error Denial Of Service Vulnerability

Solution:
Red Hat Fedora Linux has released advisory FEDORA-2004-202 along with fixes dealing with this issue. Please see the referenced advisory for more information.

SUSE has released advisory SUSE-SA:2004:020 to address this and other issues. Please see the referenced advisory for further information and fixes.

Gentoo Linux has released advisory GLSA 200407-12 to address this issue. Please see the referenced advisory for further details regarding obtaining and applying appropriate fixes.

Conectiva Linux has released advisory CLA-2004:852 along with fixes dealing with this and other issues. Please see the referenced advisory for more information.

Currently we are not aware of any vendor-supplied patches for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected] <mailto:[email protected]>.


Linux kernel 2.6.5

Linux kernel 2.6.6

References

Linux Kernel IPTables Sign Error Denial Of Service Vulnerability

References:

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