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Security update for Linux kernel

Knowledgebase

(Last modified: 11FEB2004)


solutions Security update for Linux kernel SuSE Linux Maintenance Web (9a0ec51236057e43d4176965cdd39ff0)

Applies to

Product(s): SuSE Linux Enterprise Server 8 for IBM zSeries

Release: 20040211
Obsoletes: none

Indications

Everyone using the Linux kernel on S/390x architecture should update.

Contraindications

None.

Problem description

This kernel update addresses several security problems that can lead
from local denial-of-service to local root access:
  • ncpfs/ncp_lookup: buffer overflow with the possibility to gain root privileges. (CAN-2004-0010)
  • execve(): malformed elf binaries can lead to a local denial-of-service attack.
  • mremap(): a new bug found by Paul Starzetz that can lead to local root access. (CAN-2004-0077)
Additionally, a few bugfixes are included to fix problems with SCSI starvation, lvm-mp, LAuS and NFS.
The kernel's memory management was not well tuned for handling machines with > 8GB of memory and with applications using large amounts of non-locked shared memory, such as SAP. For these situations, setting the new /proc/sys/vm/vm_shmem_swap sysctl to 1 helps.

Solution

Please install the updates provided at the location noted below.

Installation notes

This update is provided as an RPM package that can easily be installed onto a running system by using this command:
rpm -Fvh k_deflt.rpm
If you need the kernel sources you can install them by using the command:
rpm -Uvh kernel-source.rpm
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, for example "+5" for five minutes.)

links to download packages

Download Source Packages

Download the source code of the patches for maintained products.


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