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Security update for Linux kernel

Knowledgebase

(Last modified: 16MAY2006)


solutions Security update for Linux kernel
SuSE Linux Maintenance Web (4839e281693768ffa93750f8bc54dcf1)

Applies to

Package: k_athlon
k_deflt
k_psmp
k_smp
k_debug
kernel-source
Product(s): SUSE LINUX Retail Solution 8
SuSE Linux School Server for i386
SuSE Linux Standard Server 8
SuSE Linux Enterprise Server 8 for x86
SuSE Linux Openexchange Server 4
Patch: patch-10992
Release: 20060516
Obsoletes: fe38820436a873df269fdd01a2f00ece

Indications

Everyone using the Linux Kernel on x86 architecture should update.

Contraindications

None.

Problem description

This kernel update fixes several security problems:
  • CVE-2006-1524: shmat: stop mprotect from giving write permission to a readonly shared memory attachment.
  • CVE-2006-1864: Due to incorrect argument checking it was possible to break out of chroots on smbfs filesystems.
  • CVE-2006-1342: A minor information leak in SO_ORIGINAL_DST was fixed.
  • CVE-2005-4798: Creation of long symlinks on the NFS server could crash the client machine.
  • CVE-2006-1056: i386/x86-64: Fix AMD x87 information leak between processes.
  • CVE-2006-0741: x86_64 only: Always check that RIPs are canonical during signal handling, otherwise local attackers could crash the machine.
  • CVE-2006-0742: IA64 only: Don't declare die_if_kernel as noreturn, otherwise local attackers can crash the machine.
Additional following bugs were fixed:
  • reiserfs: don't BUG() in panic
  • nfs client: handle long symlinks properly
  • PowerPC64: sys_rt_sig return should return a long instead of int.
  • SCSI-Tape driver: Zero-initialize scatter-gather list to avoid BUGs.
  • IA64: don't declare die_if_kernel as noreturn

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.
First, find out which kernel package to use, for example with
rpm -qf /boot/vmlinuz
Download the kernel image fitting your setup and install it with either:
  • rpm -Fvh k_deflt-2.4.*.i586.rpm for the default kernel image, or
  • rpm -Fhv k_athlon-2.4.*.i586.rpm for the AMD Athlon optimized kernel image, or
  • rpm -Fhv k_smp-2.4.*.i586.rpm for the SMP kernel image, or
  • rpm -Fhv k_psmp-2.4.*.i586.rpm for the PSMP kernel image
Please do only install one of these kernels, not all of them.
In case you are using LILO as bootmanager, please make sure that you also execute the command
lilo
after installing the update for the system to remain bootable.
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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