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Linux Kernel Denial of Service Vulnerabilities
Secunia Advisory: SA8936
Release Date: 2003-06-03
Popularity: 13,163 views

Critical:
Moderately critical
Impact: DoS
Where: From remote
Solution Status: Vendor Patch

OS:Conectiva Linux 7.0
Conectiva Linux 8
Conectiva Linux 9
Debian GNU/Linux 3.0
Debian GNU/Linux unstable alias sid
EnGarde Secure Community 1.x
EnGarde Secure Community 2.x
EnGarde Secure Professional 1.x
Gentoo Linux 1.x
Linux Kernel 2.4.x
Mandrake Corporate Server 2.x
Mandrake Linux 8.x
Mandrake Linux 9.x
Mandrake Multi Network Firewall 8.x
OpenLinux Server 3.x
OpenLinux Workstation 3.x
RedHat Enterprise Linux AS 2.1
RedHat Enterprise Linux ES 2.1
RedHat Enterprise Linux WS 2.1
RedHat Linux 7.1
RedHat Linux 7.2
RedHat Linux 7.3
RedHat Linux 8.0
RedHat Linux 9
RedHat Linux Advanced Server 2.1 for Itanium
RedHat Linux Advanced Workstation 2.1 for Itanium
Slackware Linux 8.x
Slackware Linux 9.0
SuSE eMail Server 3.x
SuSE Linux 7.x
SuSE Linux 8.x
SuSE Linux Connectivity Server
SuSE Linux Database Server
SuSE Linux Enterprise Server 7
SuSE Linux Enterprise Server 8
SuSE Linux Firewall on CD/Admin host
SuSE Linux Office Server

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CVE reference:CVE-2003-0247
CVE-2003-0248
CVE-2003-0364


Description:
Three vulnerabilities have been identified in the Linux Kernel 2.4 branch. One can be exploited to cause a Denial of Service by a malicious person and is very similar to the recent Linux Kernel Denial of Service. The others are local Denial of Service vulnerabilities.

The remote Denial of Service is possible, because malicious people can cause hash table collisions by sending a stream of maliciously crafted fragmented TCP packets. This will cause the system to consume large amounts of CPU resources.

For more information about hash table collisions see:
http://secunia.com/advisories/8786/

It is possible to cause a kernel oops, because of an unspecified vulnerability in the tty layer. This could possibly reveal sensitive information to local users or cause a Denial of Service.

A malformed address may cause low level mxcsr code to leave garbage in CPU state registers. This could possibly lead to a Denial of Service.

Solution:
We are not aware of any official patches for the Linux Kernel.

Red Hat has issued updated packages:

Red Hat Linux 7.1:

SRPMS:
ftp://updates.redhat.com/7.1/en/os/SRPMS/kernel-2.4.20-18.7.src.rpm
ftp://updates.redhat.com/7.1/en/os/SRPMS/quota-3.06-9.71.src.rpm

athlon:
ftp://updates.redhat.com/7.1/en/os/athlon/kernel-2.4.20-18.7.athlon.rpm
ftp://updates.redhat.com/7.1/en/os/athlon/kernel-smp-2.4.20-18.7.athlon.rpm

i386:
ftp://updates.redhat.com/7.1/en/os/i386/kernel-2.4.20-18.7.i386.rpm
ftp://updates.redhat.com/7.1/en/os/i386/kernel-source-2.4.20-18.7.i386.rpm
ftp://updates.redhat.com/7.1/en/os/i386/kernel-doc-2.4.20-18.7.i386.rpm
ftp://updates.redhat.com/7.1/en/os/i386/kernel-BOOT-2.4.20-18.7.i386.rpm
ftp://updates.redhat.com/7.1/en/os/i386/quota-3.06-9.71.i386.rpm

i586:
ftp://updates.redhat.com/7.1/en/os/i586/kernel-2.4.20-18.7.i586.rpm
ftp://updates.redhat.com/7.1/en/os/i586/kernel-smp-2.4.20-18.7.i586.rpm

i686:
ftp://updates.redhat.com/7.1/en/os/i686/kernel-2.4.20-18.7.i686.rpm
ftp://updates.redhat.com/7.1/en/os/i686/kernel-smp-2.4.20-18.7.i686.rpm
ftp://updates.redhat.com/7.1/en/os/i686/kernel-bigmem-2.4.20-18.7.i686.rpm

Red Hat Linux 7.2:

SRPMS:
ftp://updates.redhat.com/7.2/en/os/SRPMS/kernel-2.4.20-18.7.src.rpm
ftp://updates.redhat.com/7.2/en/os/SRPMS/quota-3.06-9.7.src.rpm

athlon:
ftp://updates.redhat.com/7.2/en/os/athlon/kernel-2.4.20-18.7.athlon.rpm
ftp://updates.redhat.com/7.2/en/os/athlon/kernel-smp-2.4.20-18.7.athlon.rpm

i386:
ftp://updates.redhat.com/7.2/en/os/i386/kernel-2.4.20-18.7.i386.rpm
ftp://updates.redhat.com/7.2/en/os/i386/kernel-source-2.4.20-18.7.i386.rpm
ftp://updates.redhat.com/7.2/en/os/i386/kernel-doc-2.4.20-18.7.i386.rpm
ftp://updates.redhat.com/7.2/en/os/i386/kernel-BOOT-2.4.20-18.7.i386.rpm
ftp://updates.redhat.com/7.2/en/os/i386/quota-3.06-9.7.i386.rpm

i586:
ftp://updates.redhat.com/7.2/en/os/i586/kernel-2.4.20-18.7.i586.rpm
ftp://updates.redhat.com/7.2/en/os/i586/kernel-smp-2.4.20-18.7.i586.rpm

i686:
ftp://updates.redhat.com/7.2/en/os/i686/kernel-2.4.20-18.7.i686.rpm
ftp://updates.redhat.com/7.2/en/os/i686/kernel-smp-2.4.20-18.7.i686.rpm
ftp://updates.redhat.com/7.2/en/os/i686/kernel-bigmem-2.4.20-18.7.i686.rpm

Red Hat Linux 7.3:

SRPMS:
ftp://updates.redhat.com/7.3/en/os/SRPMS/kernel-2.4.20-18.7.src.rpm
ftp://updates.redhat.com/7.3/en/os/SRPMS/quota-3.06-9.7.src.rpm

athlon:
ftp://updates.redhat.com/7.3/en/os/athlon/kernel-2.4.20-18.7.athlon.rpm
ftp://updates.redhat.com/7.3/en/os/athlon/kernel-smp-2.4.20-18.7.athlon.rpm

i386:
ftp://updates.redhat.com/7.3/en/os/i386/kernel-2.4.20-18.7.i386.rpm
ftp://updates.redhat.com/7.3/en/os/i386/kernel-source-2.4.20-18.7.i386.rpm
ftp://updates.redhat.com/7.3/en/os/i386/kernel-doc-2.4.20-18.7.i386.rpm
ftp://updates.redhat.com/7.3/en/os/i386/kernel-BOOT-2.4.20-18.7.i386.rpm
ftp://updates.redhat.com/7.3/en/os/i386/quota-3.06-9.7.i386.rpm

i586:
ftp://updates.redhat.com/7.3/en/os/i586/kernel-2.4.20-18.7.i586.rpm
ftp://updates.redhat.com/7.3/en/os/i586/kernel-smp-2.4.20-18.7.i586.rpm

i686:
ftp://updates.redhat.com/7.3/en/os/i686/kernel-2.4.20-18.7.i686.rpm
ftp://updates.redhat.com/7.3/en/os/i686/kernel-smp-2.4.20-18.7.i686.rpm
ftp://updates.redhat.com/7.3/en/os/i686/kernel-bigmem-2.4.20-18.7.i686.rpm

Red Hat Linux 8.0:

SRPMS:
ftp://updates.redhat.com/8.0/en/os/SRPMS/kernel-2.4.20-18.8.src.rpm

athlon:
ftp://updates.redhat.com/8.0/en/os/athlon/kernel-2.4.20-18.8.athlon.rpm
ftp://updates.redhat.com/8.0/en/os/athlon/kernel-smp-2.4.20-18.8.athlon.rpm

i386:
ftp://updates.redhat.com/8.0/en/os/i386/kernel-2.4.20-18.8.i386.rpm
ftp://updates.redhat.com/8.0/en/os/i386/kernel-source-2.4.20-18.8.i386.rpm
ftp://updates.redhat.com/8.0/en/os/i386/kernel-doc-2.4.20-18.8.i386.rpm
ftp://updates.redhat.com/8.0/en/os/i386/kernel-BOOT-2.4.20-18.8.i386.rpm

i586:
ftp://updates.redhat.com/8.0/en/os/i586/kernel-2.4.20-18.8.i586.rpm
ftp://updates.redhat.com/8.0/en/os/i586/kernel-smp-2.4.20-18.8.i586.rpm

i686:
ftp://updates.redhat.com/8.0/en/os/i686/kernel-2.4.20-18.8.i686.rpm
ftp://updates.redhat.com/8.0/en/os/i686/kernel-smp-2.4.20-18.8.i686.rpm
ftp://updates.redhat.com/8.0/en/os/i686/kernel-bigmem-2.4.20-18.8.i686.rpm

Red Hat Linux 9:

SRPMS:
ftp://updates.redhat.com/9/en/os/SRPMS/kernel-2.4.20-18.9.src.rpm

athlon:
ftp://updates.redhat.com/9/en/os/athlon/kernel-2.4.20-18.9.athlon.rpm
ftp://updates.redhat.com/9/en/os/athlon/kernel-smp-2.4.20-18.9.athlon.rpm

i386:
ftp://updates.redhat.com/9/en/os/i386/kernel-2.4.20-18.9.i386.rpm
ftp://updates.redhat.com/9/en/os/i386/kernel-source-2.4.20-18.9.i386.rpm
ftp://updates.redhat.com/9/en/os/i386/kernel-doc-2.4.20-18.9.i386.rpm
ftp://updates.redhat.com/9/en/os/i386/kernel-BOOT-2.4.20-18.9.i386.rpm

i586:
ftp://updates.redhat.com/9/en/os/i586/kernel-2.4.20-18.9.i586.rpm
ftp://updates.redhat.com/9/en/os/i586/kernel-smp-2.4.20-18.9.i586.rpm

i686:
ftp://updates.redhat.com/9/en/os/i686/kernel-2.4.20-18.9.i686.rpm
ftp://updates.redhat.com/9/en/os/i686/kernel-smp-2.4.20-18.9.i686.rpm
ftp://updates.redhat.com/9/en/os/i686/kernel-bigmem-2.4.20-18.9.i686.rpm

Provided and/or discovered by:
Al Viro
Andrea Arcangeli

Original Advisory:
http://rhn.redhat.com/errata/RHSA-2003-187.html


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