Mandrake Linux Security Update Advisory: kernel 2.4 update
Aug 29, 2001, 07:20 (4 Talkback[s])
Date: Tue, 28 Aug 2001 10:39:10 -0600
From: Linux Mandrake Security Team <firstname.lastname@example.org>
Subject: MDKSA-2001:071 - kernel 2.4 update
Mandrake Linux Security Update Advisory
Package name: kernel
Date: August 28th, 2001
Advisory ID: MDKSA-2001:071
Affected versions: 8.0
A security hole was found in the earlier Linux 2.4 kernels dealing with
iptables RELATED connection tracking. The iptables ip_conntrack_ftp
module, which is used for stateful inspection of FTP traffic,
does not validate parameters passed to it in an FTP PORT command. Due
to this flaw, carefully constructed PORT commands could open arbitrary
holes in the firewall. This hole has been fixed, as well as a number
of other bugs for the 2.4 kernel shipped with Mandrake Linux 8.0
NOTE: This update is not meant to be done via MandrakeUpdate! You
must download the necessary RPMs and upgrade manually by following
1. Type: rpm -ivh kernel-2.4.7-12.3mdk.i586.rpm
2. Type: mv kernel-2.4.7-12.3mdk.i586.rpm
3. Type: rpm -Fvh *.rpm
4. You may wish to edit /etc/lilo.conf to ensure a new entry is in
place. The new kernel will be the last entry. Change any options
you need to change.
5. Type: /sbin/lilo -v
You may then reboot and use the nwe kernel and remove the older kernel
when you are comfortable using the upgraded one.
Please verify the update prior to upgrading to ensure the integrity of
the downloaded package. You can do this with the command:
rpm --checksig package.rpm
You can get the GPG public key of the Mandrake Linux Security Team at
If you use MandrakeUpdate, the verification of md5 checksum and GPG
signature is performed automatically for you.
Mandrake Linux 8.0:
Bug IDs fixed (see https://qa.mandrakesoft.com for more information):
If you want to upgrade manually, download the updated package from one
of our FTP server mirrors and upgrade with "rpm -Fvh *.rpm".
You can download the updates directly from one of the mirror sites
Updated packages are available in the "updates/[ver]/RPMS/" directory.
For example, if you are looking for an updated RPM package for
Mandrake Linux 8.0, look for it in "updates/8.0/RPMS/". Updated source
RPMs are available as well, but you generally do not need to download
Please be aware that sometimes it takes the mirrors a few hours to
You can view other security advisories for Mandrake Linux at:
If you want to report vulnerabilities, please contact
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