[RHSA-2010:0161-01] Important: kernel-rt security and bug fix update

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Red Hat Security Advisory

 

Synopsis: Important: kernel-rt security and bug fix update

Advisory ID: RHSA-2010:0161-01

Product: Red Hat Enterprise MRG for RHEL-5

Advisory URL: https://rhn.redhat.com/errata/RHSA-2010-0161.html

Issue date: 2010-03-23

CVE Names: CVE-2009-4141 CVE-2010-0003 CVE-2010-0007

CVE-2010-0291 CVE-2010-0410 CVE-2010-0415

CVE-2010-0437 CVE-2010-0622

=====================================================================

 

1. Summary:

 

Updated kernel-rt packages that fix multiple security issues and several

bugs are now available for Red Hat Enterprise MRG 1.2.

 

The Red Hat Security Response Team has rated this update as having

important security impact. Common Vulnerability Scoring System (CVSS) base

scores, which give detailed severity ratings, are available for each

vulnerability from the CVE links in the References section.

 

2. Relevant releases/architectures:

 

MRG Realtime for RHEL 5 Server - i386, noarch, x86_64

 

3. Description:

 

The kernel-rt packages contain the Linux kernel, the core of any Linux

operating system.

 

This update fixes the following security issues:

 

* a deficiency was found in the fasync_helper() implementation. This could

allow a local, unprivileged user to leverage a use-after-free of locked,

asynchronous file descriptors to cause a denial of service or privilege

escalation. (CVE-2009-4141, Important)

 

* multiple flaws were found in the mmap and mremap implementations. A

local, unprivileged user could use these flaws to cause a local denial of

service or escalate their privileges. (CVE-2010-0291, Important)

 

* a missing boundary check was found in the do_move_pages() function in the

memory migration functionality. A local user could use this flaw to cause a

local denial of service or an information leak. (CVE-2010-0415, Important)

 

* a NULL pointer dereference flaw was found in the ip6_dst_lookup_tail()

function. An attacker on the local network could trigger this flaw by

sending IPv6 traffic to a target system, leading to a system crash (kernel

OOPS) if dst->neighbour is NULL on the target system when receiving an IPv6

packet. (CVE-2010-0437, Important)

 

* a NULL pointer dereference flaw was found in the Fast Userspace Mutexes

(futexes) implementation. The unlock code path did not check if the futex

value associated with pi_state->owner had been modified. A local user could

use this flaw to modify the futex value, possibly leading to a denial of

service or privilege escalation when the pi_state->owner pointer is

dereferenced. (CVE-2010-0622, Important)

 

* an information leak was found in the print_fatal_signal() implementation.

When "/proc/sys/kernel/print-fatal-signals" is set to 1 (the default value

is 0), memory that is reachable by the kernel could be leaked to

user-space. This issue could also result in a system crash. Note that this

flaw only affected the i386 architecture. (CVE-2010-0003, Moderate)

 

* a flaw was found in the kernel connector implementation. A local,

unprivileged user could trigger this flaw by sending an arbitrary amount of

notification requests using specially-crafted netlink messages, resulting

in a denial of service. (CVE-2010-0410, Moderate)

 

* missing capability checks were found in the ebtables implementation, used

for creating an Ethernet bridge firewall. This could allow a local,

unprivileged user to bypass intended capability restrictions and modify

ebtables rules. (CVE-2010-0007, Low)

 

This update also fixes the following bugs:

 

* references were missing for two LSI MegaRAID SAS controllers already

supported by the kernel, preventing systems using these controllers from

booting. (BZ#554664)

 

* a typo in the fix for CVE-2009-2691 resulted in gdb being unable to read

core files created by gcore. (BZ#554965)

 

* values for certain pointers used by the kernel, which should be

undereferencable, could potentially be abused when a kernel OOPS occurs.

Values that are harder to dereference are now used. (BZ#555227)

 

* this update redesigns the locking scheme of the TTY process group

(tty->pgrp) structure, due to race conditions introduced when tty->pgrp

started using struct pid instead of pid_t. (BZ#559101)

 

* the way the NFS kernel server used iget() and the way in which it kept

its cache of inode information, could have led to (mainly on busy file

servers) inconsistencies between the local file system and the file system

being served to clients. (BZ#561275)

 

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.

 

4. Solution:

 

Before applying this update, make sure all previously-released errata

relevant to your system have been applied.

 

This update is available via the 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

 

5. Bugs fixed (http://bugzilla.redhat.com/):

 

547906 - CVE-2009-4141 kernel: create_elf_tables can leave urandom in a bad state

554578 - CVE-2010-0003 kernel: infoleak if print-fatal-signals=1

554664 - MRG current has a very old megaraid_sas driver

554965 - gcore tool produces unusable corefile with MRG kernel

555238 - CVE-2010-0007 kernel: netfilter: ebtables: enforce CAP_NET_ADMIN

556703 - CVE-2010-0291 kernel: untangle the do_mremap()

561275 - kernel: serious ugliness in iget() uses by nfsd [mrg-1]

561682 - CVE-2010-0410 kernel: OOM/crash in drivers/connector

562582 - CVE-2010-0415 kernel: sys_move_pages infoleak

563091 - CVE-2010-0622 kernel: futex: Handle user space corruption gracefully

563781 - CVE-2010-0437 kernel: ipv6: fix ip6_dst_lookup_tail() NULL pointer dereference

 

6. Package List:

 

MRG Realtime for RHEL 5 Server:

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/RHEMRG/SRPMS/kernel-rt-2.6.24.7-149.el5rt.src.rpm

 

i386:

kernel-rt-2.6.24.7-149.el5rt.i686.rpm

kernel-rt-debug-2.6.24.7-149.el5rt.i686.rpm

kernel-rt-debug-debuginfo-2.6.24.7-149.el5rt.i686.rpm

kernel-rt-debug-devel-2.6.24.7-149.el5rt.i686.rpm

kernel-rt-debuginfo-2.6.24.7-149.el5rt.i686.rpm

kernel-rt-debuginfo-common-2.6.24.7-149.el5rt.i686.rpm

kernel-rt-devel-2.6.24.7-149.el5rt.i686.rpm

kernel-rt-trace-2.6.24.7-149.el5rt.i686.rpm

kernel-rt-trace-debuginfo-2.6.24.7-149.el5rt.i686.rpm

kernel-rt-trace-devel-2.6.24.7-149.el5rt.i686.rpm

kernel-rt-vanilla-2.6.24.7-149.el5rt.i686.rpm

kernel-rt-vanilla-debuginfo-2.6.24.7-149.el5rt.i686.rpm

kernel-rt-vanilla-devel-2.6.24.7-149.el5rt.i686.rpm

 

noarch:

kernel-rt-doc-2.6.24.7-149.el5rt.noarch.rpm

 

x86_64:

kernel-rt-2.6.24.7-149.el5rt.x86_64.rpm

kernel-rt-debug-2.6.24.7-149.el5rt.x86_64.rpm

kernel-rt-debug-debuginfo-2.6.24.7-149.el5rt.x86_64.rpm

kernel-rt-debug-devel-2.6.24.7-149.el5rt.x86_64.rpm

kernel-rt-debuginfo-2.6.24.7-149.el5rt.x86_64.rpm

kernel-rt-debuginfo-common-2.6.24.7-149.el5rt.x86_64.rpm

kernel-rt-devel-2.6.24.7-149.el5rt.x86_64.rpm

kernel-rt-trace-2.6.24.7-149.el5rt.x86_64.rpm

kernel-rt-trace-debuginfo-2.6.24.7-149.el5rt.x86_64.rpm

kernel-rt-trace-devel-2.6.24.7-149.el5rt.x86_64.rpm

kernel-rt-vanilla-2.6.24.7-149.el5rt.x86_64.rpm

kernel-rt-vanilla-debuginfo-2.6.24.7-149.el5rt.x86_64.rpm

kernel-rt-vanilla-devel-2.6.24.7-149.el5rt.x86_64.rpm

 

These packages are GPG signed by Red Hat for security. Our key and

details on how to verify the signature are available from

https://www.redhat.com/security/team/key/#package

 

7. References:

 

https://www.redhat.com/security/data/cve/CVE-2009-4141.html

https://www.redhat.com/security/data/cve/CVE-2010-0003.html

https://www.redhat.com/security/data/cve/CVE-2010-0007.html

https://www.redhat.com/security/data/cve/CVE-2010-0291.html

https://www.redhat.com/security/data/cve/CVE-2010-0410.html

https://www.redhat.com/security/data/cve/CVE-2010-0415.html

https://www.redhat.com/security/data/cve/CVE-2010-0437.html

https://www.redhat.com/security/data/cve/CVE-2010-0622.html

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

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://www.redhat.com/security/team/contact/

 

Copyright 2010 Red Hat, Inc.

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