Synopsis

Important: kernel security and bug fix update

Type/Severity

Security Advisory: Important

Topic

Updated kernel packages that fix several security issues and several bugs
are now available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red
Hat Security Response Team.

Description

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

Security fixes:

• several flaws were found in the way the Linux kernel CIFS implementation
  handles Unicode strings. CIFS clients convert Unicode strings sent by a
  server to their local character sets, and then write those strings into
  memory. If a malicious server sent a long enough string, it could write
  past the end of the target memory region and corrupt other memory areas,
  possibly leading to a denial of service or privilege escalation on the
  client mounting the CIFS share. (CVE-2009-1439, CVE-2009-1633, Important)
  
• the Linux kernel Network File System daemon (nfsd) implementation did not
  drop the CAP_MKNOD capability when handling requests from local,
  unprivileged users. This flaw could possibly lead to an information leak or
  privilege escalation. (CVE-2009-1072, Moderate)
  
• Frank Filz reported the NFSv4 client was missing a file permission check
  for the execute bit in some situations. This could allow local,
  unprivileged users to run non-executable files on NFSv4 mounted file
  systems. (CVE-2009-1630, Moderate)
  
• a missing check was found in the hypervisor_callback() function in the
  Linux kernel provided by the kernel-xen package. This could cause a denial
  of service of a 32-bit guest if an application running in that guest
  accesses a certain memory location in the kernel. (CVE-2009-1758, Moderate)
  
• a flaw was found in the AGPGART driver. The agp_generic_alloc_page() and
  agp_generic_alloc_pages() functions did not zero out the memory pages they
  allocate, which may later be available to user-space processes. This flaw
  could possibly lead to an information leak. (CVE-2009-1192, Low)
  

Bug fixes:

• a race in the NFS client between destroying cached access rights and
  unmounting an NFS file system could have caused a system crash. "Busy
  inodes" messages may have been logged. (BZ#498653)
  
• nanosleep() could sleep several milliseconds less than the specified time
  on Intel Itanium(r)-based systems. (BZ#500349)
  
• LEDs for disk drives in AHCI mode may have displayed a fault state when
  there were no faults. (BZ#500120)
  
• ptrace_do_wait() reported tasks were stopped each time the process doing
  the trace called wait(), instead of reporting it once. (BZ#486945)
  
• epoll_wait() may have caused a system lockup and problems for
  applications. (BZ#497322)
  
• missing capabilities could possibly allow users with an fsuid other than
  0 to perform actions on some file system types that would otherwise be
  prevented. (BZ#497271)
  
• on NFS mounted file systems, heavy write loads may have blocked
  nfs_getattr() for long periods, causing commands that use stat(2), such as
  ls, to hang. (BZ#486926)
  
• in rare circumstances, if an application performed multiple O_DIRECT
  reads per virtual memory page and also performed fork(2), the buffer
  storing the result of the I/O may have ended up with invalid data.
  (BZ#486921)
  
• when using GFS2, gfs2_quotad may have entered an uninterpretable sleep
  state. (BZ#501742)
  
• with this update, get_random_int() is more random and no longer uses a
  common seed value, reducing the possibility of predicting the values
  returned. (BZ#499783)
  
• the "-fwrapv" flag was added to the gcc build options to prevent gcc from
  optimizing away wrapping. (BZ#501751)
  
• a kernel panic when enabling and disabling iSCSI paths. (BZ#502916)
  
• using the Broadcom NetXtreme BCM5704 network device with the tg3 driver
  caused high system load and very bad performance. (BZ#502837)
  
• "/proc/[pid]/maps" and "/proc/[pid]/smaps" can only be read by processes
  able to use the ptrace() call on a given process; however, certain
  information from "/proc/[pid]/stat" and "/proc/[pid]/wchan" could be used
  to reconstruct memory maps. (BZ#499546)
  

Users should upgrade to these updated packages, which contain backported
patches to correct these issues. The system must be rebooted for this
update to take effect.

Solution

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux Server - Extended Update Support 5.3 x86_64
• Red Hat Enterprise Linux Server - Extended Update Support 5.3 ia64
• Red Hat Enterprise Linux Server - Extended Update Support 5.3 i386
• Red Hat Enterprise Linux Server - AUS 5.3 x86_64
• Red Hat Enterprise Linux Server - AUS 5.3 ia64
• Red Hat Enterprise Linux Server - AUS 5.3 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 5.3 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 5.3 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 486921 - Corruption on ext3/xfs with O_DIRECT and unaligned user buffers
• BZ - 486926 - [RHEL5.2] nfs_getattr() hangs during heavy write workloads
• BZ - 486945 - waitpid() reports stopped process more than once
• BZ - 491572 - CVE-2009-1072 kernel: nfsd should drop CAP_MKNOD for non-root
• BZ - 494275 - CVE-2009-1439 kernel: cifs: memory overwrite when saving nativeFileSystem field during mount
• BZ - 496572 - CVE-2009-1633 kernel: cifs: fix potential buffer overruns when converting unicode strings sent by server
• BZ - 497020 - CVE-2009-1192 kernel: agp: zero pages before sending to userspace
• BZ - 497322 - crm #1896100 port epoll_wait fix from RHSA-2008-0665 to RHEL 5
• BZ - 498653 - fault in iget() - suspected race between nfs_access_cache_shrinker() and umount - Ref.: Bug #433249
• BZ - 499546 - kernel: proc: avoid information leaks to non-privileged processes [rhel-5.3.z]
• BZ - 499783 - kernel: random: make get_random_int() more random [rhel-5.3.z]
• BZ - 500120 - Problem with drive status leds after update to 2.6.18-128.el5
• BZ - 500297 - CVE-2009-1630 kernel: nfs: fix NFS v4 client handling of MAY_EXEC in nfs_permission
• BZ - 500349 - RHEL5.3.z LTP nanosleep02 Test Case Failure on Fujitsu Machine
• BZ - 500945 - CVE-2009-1758 kernel: xen: local denial of service
• BZ - 501742 - GFS2: gfs2_quotad in uninterruptible sleep while idle
• BZ - 501751 - kernel should be built with -fwrapv [rhel-5.3.z]
• BZ - 502837 - BCM5704 NIC results in CPU 100%SI , sluggish system performance
• BZ - 502916 - kernel BUG at drivers/scsi/libiscsi.c:301!

CVEs

• CVE-2009-1439
• CVE-2009-1192
• CVE-2009-1072
• CVE-2009-1633
• CVE-2009-1630
• CVE-2009-1758
• CVE-2009-3238

References

• http://www.redhat.com/security/updates/classification/#important

Red Hat Enterprise Linux Server 5

SRPM
x86_64
kernel-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: 5dd1ce85f9470425935e340f0278f27c6a4a1736c24dffd5212e798a247a4cbd
kernel-debug-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: b7503ef0843e414992bb21fde2771945c44eb80394675361dbacb00a3b550c21
kernel-debug-devel-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: 7d77e8ad6149167b38fd084efc72759213f77cc259ef02434310abaad861f605
kernel-devel-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: 84d5d5b6ae155c6604af03a5212719de60eab9de613c2c454819b14a758abe78
kernel-doc-2.6.18-128.1.14.el5.noarch.rpm	SHA-256: 59914e53e749abddb27e9b575460957087750c7811ea93005d63a5cb37c596f3
kernel-headers-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: 43193e9bbe0ff1f5669dc77f4bee4f4a2069a91b0d22767de36a920b6288fbf7
kernel-xen-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: 675591d9d437ae534da31fef3eab3f7ff3e3abe62a119dd16eed10efc659149b
kernel-xen-devel-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: dc1efeef5939348e3acda86cdb24cffc96b22d20d1b48c9f6cee59c8a1d17add
ia64
kernel-doc-2.6.18-128.1.14.el5.noarch.rpm	SHA-256: 59914e53e749abddb27e9b575460957087750c7811ea93005d63a5cb37c596f3
i386
kernel-doc-2.6.18-128.1.14.el5.noarch.rpm	SHA-256: 59914e53e749abddb27e9b575460957087750c7811ea93005d63a5cb37c596f3

Red Hat Enterprise Linux Workstation 5

SRPM
x86_64
kernel-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: 5dd1ce85f9470425935e340f0278f27c6a4a1736c24dffd5212e798a247a4cbd
kernel-debug-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: b7503ef0843e414992bb21fde2771945c44eb80394675361dbacb00a3b550c21
kernel-debug-devel-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: 7d77e8ad6149167b38fd084efc72759213f77cc259ef02434310abaad861f605
kernel-devel-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: 84d5d5b6ae155c6604af03a5212719de60eab9de613c2c454819b14a758abe78
kernel-doc-2.6.18-128.1.14.el5.noarch.rpm	SHA-256: 59914e53e749abddb27e9b575460957087750c7811ea93005d63a5cb37c596f3
kernel-headers-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: 43193e9bbe0ff1f5669dc77f4bee4f4a2069a91b0d22767de36a920b6288fbf7
kernel-xen-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: 675591d9d437ae534da31fef3eab3f7ff3e3abe62a119dd16eed10efc659149b
kernel-xen-devel-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: dc1efeef5939348e3acda86cdb24cffc96b22d20d1b48c9f6cee59c8a1d17add
i386
kernel-doc-2.6.18-128.1.14.el5.noarch.rpm	SHA-256: 59914e53e749abddb27e9b575460957087750c7811ea93005d63a5cb37c596f3

Red Hat Enterprise Linux Desktop 5

SRPM
x86_64
kernel-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: 5dd1ce85f9470425935e340f0278f27c6a4a1736c24dffd5212e798a247a4cbd
kernel-debug-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: b7503ef0843e414992bb21fde2771945c44eb80394675361dbacb00a3b550c21
kernel-debug-devel-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: 7d77e8ad6149167b38fd084efc72759213f77cc259ef02434310abaad861f605
kernel-devel-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: 84d5d5b6ae155c6604af03a5212719de60eab9de613c2c454819b14a758abe78
kernel-doc-2.6.18-128.1.14.el5.noarch.rpm	SHA-256: 59914e53e749abddb27e9b575460957087750c7811ea93005d63a5cb37c596f3
kernel-headers-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: 43193e9bbe0ff1f5669dc77f4bee4f4a2069a91b0d22767de36a920b6288fbf7
kernel-xen-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: 675591d9d437ae534da31fef3eab3f7ff3e3abe62a119dd16eed10efc659149b
kernel-xen-devel-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: dc1efeef5939348e3acda86cdb24cffc96b22d20d1b48c9f6cee59c8a1d17add
i386
kernel-doc-2.6.18-128.1.14.el5.noarch.rpm	SHA-256: 59914e53e749abddb27e9b575460957087750c7811ea93005d63a5cb37c596f3

Red Hat Enterprise Linux for IBM z Systems 5

SRPM
s390x
kernel-doc-2.6.18-128.1.14.el5.noarch.rpm	SHA-256: 59914e53e749abddb27e9b575460957087750c7811ea93005d63a5cb37c596f3

Red Hat Enterprise Linux for Power, big endian 5

SRPM
ppc
kernel-doc-2.6.18-128.1.14.el5.noarch.rpm	SHA-256: 59914e53e749abddb27e9b575460957087750c7811ea93005d63a5cb37c596f3

Red Hat Enterprise Linux Server from RHUI 5

SRPM
x86_64
kernel-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: 5dd1ce85f9470425935e340f0278f27c6a4a1736c24dffd5212e798a247a4cbd
kernel-debug-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: b7503ef0843e414992bb21fde2771945c44eb80394675361dbacb00a3b550c21
kernel-debug-devel-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: 7d77e8ad6149167b38fd084efc72759213f77cc259ef02434310abaad861f605
kernel-devel-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: 84d5d5b6ae155c6604af03a5212719de60eab9de613c2c454819b14a758abe78
kernel-doc-2.6.18-128.1.14.el5.noarch.rpm	SHA-256: 59914e53e749abddb27e9b575460957087750c7811ea93005d63a5cb37c596f3
kernel-headers-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: 43193e9bbe0ff1f5669dc77f4bee4f4a2069a91b0d22767de36a920b6288fbf7
kernel-xen-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: 675591d9d437ae534da31fef3eab3f7ff3e3abe62a119dd16eed10efc659149b
kernel-xen-devel-2.6.18-128.1.14.el5.x86_64.rpm	SHA-256: dc1efeef5939348e3acda86cdb24cffc96b22d20d1b48c9f6cee59c8a1d17add
i386
kernel-doc-2.6.18-128.1.14.el5.noarch.rpm	SHA-256: 59914e53e749abddb27e9b575460957087750c7811ea93005d63a5cb37c596f3