Security update for Linux kernel (k_deflt)
(Last modified: 05DEC2002)
solutions Security update for Linux kernel (k_deflt) SuSE Linux Maintenance Web (334f03bfebc1a38dd985b42612f1efb9)
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This article applies to systems with the
k_defltkernel package installed, please use the appropriate kernel package if you are using a different kernel:
- "Security update for Linux kernel (k_smp)" (http://sdb.suse.de/en/psdb/html/e9372c09d1d7e4a706cb6d7f75f2b0b2.html)
- "Security update for Linux kernel (k_i386)" (http://sdb.suse.de/en/psdb/html/71462a10cc623f02b8347e92a49cfb43.html)
- "Security update for Linux kernel (k_psmp)" (http://sdb.suse.de/en/psdb/html/b63aebf2741eab25a53255eb4c6f1654.html)
rpm -qf /boot/vmlinuz
The TCP SYN-RST bug is a remote bug in the sense that a packet having both the SYN and the RST flags set will be accepted, while packet filters often target SYN-only flagged TCP packets. The error fixed in the
ip_conntrackpart of the netfilter code addresses a problem where an attacker can establish entries in the connection tracking table of established connections even if the packets in question do not have valid TCP sequence numbers. This can result in a denial of service attack when the table gets filled up.
The list of security bugs resolved:
- a mass exit race condition
- security fix and memory leak fix in
- fix in trace flag (TF flag) handling (hangs the system)
- nested task flag (NT flag) handling (hangs the system)
- fix the handling of TCP SYN-RST packets that can bypass filter rules that match SYN only
/proc/cmdlinekernel memory exposure
- fix in
ip_conntrack(SYN/ACK handling, DoS)
rpm -Uvh k_deflt.rpm
Please make sure that you execute the commands
as user "
root" after installing this update for the system to be bootable.
Furthermore, if you are upgrading from kernel 2.4.7 please make sure to install the updated kernel utils as described in the maintenance web articles
- "Recommended update for kernel utils and modules" (http://sdb.suse.de/en/psdb/html/fee12d4d654d25119d25e36e8fe8b36a.html)
- "Recommended update for REISERFS " (http://sdb.suse.de/en/psdb/html/8c0c2a3fd413890bb05d95d3f01b459e.html)
Finally, reboot the system with
shutdown -r now
to load the new kernel (replace "
now" with the appropriate amount of time to allow local users to cleanly log out.)
Download Source Packages
Download the source code of the patches for maintained products.
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