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Security update for Linux kernel

Knowledgebase

(Last modified: 09DEC2005)


solutions Security update for Linux kernel
SuSE Linux Maintenance Web (0efbd4214ff63cd671f6ac22674becbe)

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-10796
Release: 20051209
Obsoletes: d8deb18ca981f40c696c338f5c7448c3

Indications

Contraindications

Problem description

This kernel update contains several security fixes and some bugfixes, listed below:
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 a race on the count of unused dcache entries.
  • Fixed the "treason uncloaked" kernel messages that were caused by a stale pred_flags variable when the TCP snd_wnd changes.
  • Allow filesystems to return NFSERR_JUKEBOX to the server by returning -ETIMEDOUT.
  • Documented SCSI device scanning parameters.
  • Added an NFS ACL fix for Solaris VxFS compatibility.
  • Fixed an incorrect error return in ip_conntrack_expect_related.
  • Add EMC Invista to SCSI LUN blacklist.
  • A USB problem with the OHCI chipset was fixed.
  • When coredumping, the 0.000000s and 0s register are now stored correctly.
  • The TSC (timestampcount) register is now used as monotonic source for the hangcheck timer.

Solution

Please install the updates provided at the location noted below.

Installation notes

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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