[slackware-security] 2.4.21 kernels available
(SSA:2003-168-01)
Precompiled Linux 2.4.21 kernels and source packages are now
available for Slackware 9.0 and -current. These provide an improved
version of the ptrace fix that had been applied to 2.4.20 in
Slackware 9.0 (for example, command line options now appear
correctly when root does ‘ps ax’), and fix a potential denial of
service problem with netfilter.
Here are the details from the Slackware 9.0 ChangeLog:
+————————–+
Tue Jun 17 19:41:55 PDT 2003
New precompiled Linux 2.4.21 kernels and source packages are now
available for Slackware 9.0. These fix a few problems with the
ptrace patch used with the 2.4.20 kernel, and add a few extra
drivers (like Silicon Image Serial-ATA support). The new kernel
also fixes a number of security issues, such as a routing cache
problem in 2.4.20 and earlier can allow an attacker to cause hash
collisions in the prerouting chain that consume CPU resources
resulting in a denial-of-service (CAN-2003-0244).
patches/packages/kernel-headers-2.4.21-i386-1.tgz: Upgraded to
Linux 2.4.21 kernel headers.
patches/packages/kernel-ide-2.4.21-i486-1.tgz: Upgraded to Linux
2.4.21.
patches/packages/kernel-modules-2.4.21-i486-1.tgz: Upgraded kernel
modules to Linux 2.4.21.
patches/packages/kernel-modules-2.4.21_xfs-i486-1.tgz: Upgraded the
XFS-patched kernel modules package to Linux 2.4.21-xfs. These are
needed for the xfs.i kernel.
patches/packages/kernel-source-2.4.21-noarch-1.tgz: Upgraded to
Linux 2.4.21 source.
patches/kernels/*: Upgraded to Linux 2.4.21. (* Security fix *)
+————————–+
WHERE TO FIND THE NEW PACKAGES:
Updated packages for Slackware 9.0:
ftp://ftp.slackware.com/pub/slackware/slackware-9.0/patches/packages/kernel-headers-2.4.21-i386-1.tgz
ftp://ftp.slackware.com/pub/slackware/slackware-9.0/patches/packages/kernel-ide-2.4.21-i486-1.tgz
ftp://ftp.slackware.com/pub/slackware/slackware-9.0/patches/packages/kernels/
INSTALLATION INSTRUCTIONS:
If you are using the standard Slackware “bare.i” kernel, you may
update your kernel like this:
upgradepkg kernel-ide-2.4.21-i486-1.tgz
kernel-modules-2.4.21-i486-1.tgz
Then, reinstall your boot loader. This may be as simple as
running ‘lilo’ as root, or you may use ‘makebootdisk’ to create a
new boot floppy.
If you use a different kernel, you’ll want to use upgradepkg to
update the appropriate kernel modules package
(kernel-modules-2.4.21-i486-1.tgz for most kernels, but if you use
the xfs.i kernel with XFS patches, then you will need to use the
kernel-modules-2.4.21_xfs-i486-1.tgz package instead). Then,
install the kernel from the kernels/ directory. For example, to
install the adaptec.s kernel:
cd kernels/adaptec.s
rm -f /boot/System.map /boot/config /boot/vmlinuz
cp -a System.map.gz config bzImage /boot
gzip -d /boot/System.map.gz
mv /boot/bzImage /boot/vmlinuz
Then, reinstall your boot loader.
You may also wish to update your installed kernel sources:
upgradepkg kernel-headers-2.4.21-i386-1.tgz
kernel-source-2.4.21-noarch-1.tgz
If you use XFS or Speakup you’ll need to apply additional
patches found here:
ftp://ftp.slackware.com/pub/slackware/slackware-9.0/patches/source/kernel-source/
+—–+
Slackware Linux Security Team
http://slackware.com/gpg-key
[email protected]