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Security update for Kernel

Knowledgebase

(Last modified: 05DEC2005)


solutions Security update for Kernel SuSE Linux Maintenance Web (20c5e4c2a0fea3202c966fa44c89b13e)

Applies to

Package: k_athlon
k_deflt
k_psmp
k_smp
kernel-source
Product(s): SuSE Linux Desktop 1.0
Patch: patch-10757
Release: 20051205
Obsoletes: 3d61d15f4e0e49c7e669b2c2b1d53281

Indications

Everyone using the Linux Kernel on x86 architecture should update.

Problem description

This kernel update contains several security fixes and some bugfixes.
Security fixes:
  • CVE-2005-3783: A check in ptrace(2) handling that finds out if a process is attaching to itself was incorrect and could be used by a local attacker to crash the machine.
  • CVE-2005-3044: Missing sockfd_put() calls in routing_ioctl() leaked file handles which in turn could exhaust system memory.
  • CVE-2005-2490: A stack-based buffer overflow in the sendmsg function call in the Linux kernel 2.6 and 2.4 allowed local users execute arbitrary code by calling sendmsg and modifying the message contents in another thread.
  • CVE-2005-3806: A bug in IPv6 flowlabel handling code could be used by a local attacker to free non-allocated memory and in turn corrupt kernel memory and likely crash the machine.
  • CVE-2005-3275: The NAT code in Linux kernel incorrectly declares a variable to be static, which allows remote attackers to cause a denial of service (memory corruption) by causing two packets for the same protocol to be NATed at the same time.
  • CVE-2005-2457: A problem in decompression of files on "zisofs" filesystem was fixed.
  • CVE-2005-2458: A potential buffer overflow in the zlib decompression handling in the kernel was fixed.
  • CVE-2005-2459: Some return codes in zlib decoding were fixed which could have led to an attacker crashing the kernel.
Non security bugfixes:
  • Fixed the "treason uncloaked" kernel messages that were caused by a stale pred_flags variable when the TCP snd_wnd changes.
  • Fixed an incorrect error return in ip_conntrack_expect_related.

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:
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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