Security Advisory Important: kernel security and bug fix update

Advisory: RHSA-2010:0882-1
Type: Security Advisory
Severity: Important
Issued on: 2010-11-12
Last updated on: 2010-11-12
Affected Products: Red Hat Enterprise Linux ELS (v. 3)
CVEs ( CVE-2009-3080


Updated kernel packages that fix several security issues and one bug are
now available for Red Hat Enterprise Linux 3 Extended Life Cycle Support

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.

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

This update fixes the following security issues:

* An array index error was found in the gdth driver in the Linux kernel. A
local user could send a specially-crafted IOCTL request that would cause a
denial of service or, possibly, privilege escalation. (CVE-2009-3080,

* NULL pointer dereference flaws were found in the r128 driver in the Linux
kernel. Checks to test if the Concurrent Command Engine state was
initialized were missing in private IOCTL functions. An attacker could use
these flaws to cause a local denial of service or escalate their
privileges. (CVE-2009-3620, Important)

* A flaw was found in the Intel PRO/1000 Linux driver, e1000, in the Linux
kernel. A remote attacker using packets larger than the MTU could bypass
the existing fragment check, resulting in partial, invalid frames being
passed to the network stack. This flaw could also possibly be used to
trigger a remote denial of service. (CVE-2009-4536, Important)

* A use-after-free flaw was found in the tcp_rcv_state_process() function
in the Linux kernel TCP/IP protocol suite implementation. If a system using
IPv6 had the IPV6_PKTINFO option set on a listening socket, a remote
attacker could send an IPv6 packet to that system, causing a kernel panic
(denial of service). (CVE-2010-1188, Important)

* When an application has a stack overflow, the stack could silently
overwrite another memory mapped area instead of a segmentation fault
occurring, which could cause an application to execute arbitrary code,
possibly leading to privilege escalation. It is known that the X Window
System server can be used to trigger this flaw. (CVE-2010-2240, Important)

* The compat_alloc_user_space() function in the Linux kernel 32/64-bit
compatibility layer implementation was missing sanity checks. This function
could be abused in other areas of the Linux kernel. On 64-bit systems, a
local, unprivileged user could use this flaw to escalate their privileges.
(CVE-2010-3081, Important)

Red Hat would like to thank the X.Org security team for reporting the
CVE-2010-2240 issue, with upstream acknowledging Rafal Wojtczuk as the
original reporter; and Ben Hawkes for reporting the CVE-2010-3081 issue.

This update also fixes the following bug:

* The RHSA-2009:1550 kernel update introduced a regression that prevented
certain custom kernel modules from loading, failing with "unresolved
symbol" errors. This update corrects this issue, allowing the affected
modules to load as expected. (BZ#556909)

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.


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

To install kernel packages manually, use "rpm -ivh [package]". Do not
use "rpm -Uvh" as that will remove the running kernel binaries from
your system. You may use "rpm -e" to remove old kernels after
determining that the new kernel functions properly on your system.

Updated packages

Red Hat Enterprise Linux ELS (v. 3)

kernel-2.4.21-66.EL.src.rpm     MD5: a0630b5eea86346992f16ebcd152b51e
SHA-256: b8d20be0adb84f8374948d8e752ee2cbeaa5d19f3fc1fee55b03b4f551e026ec
kernel-2.4.21-66.EL.athlon.rpm     MD5: 9b7203846822bfadec5e82f47b985647
SHA-256: 6e700607ff4c4e4dac3f40b99758fe0b02908f983676920f27580cce99e8ba34
kernel-2.4.21-66.EL.i686.rpm     MD5: 5846b4a62d1792b06ab1605f85d27395
SHA-256: 432cb33563a75419df9bc03125876d2b2d0cf78b6d7af4417ad2ce78ad42dc43
kernel-BOOT-2.4.21-66.EL.i386.rpm     MD5: fb9b841ca9411f4a70addc75acd487ed
SHA-256: c3e0ae5eb706fd36c9990189f6c70ee219d135894f79d1e74642e5c8b84eecf2
kernel-doc-2.4.21-66.EL.i386.rpm     MD5: f4de874a31d129e97e3b07eadf49a245
SHA-256: 7af53837fb2b548d06855638dc60ec74df820d9af0bb8405733858bf09a92fa4
kernel-hugemem-2.4.21-66.EL.i686.rpm     MD5: da4d8ae937afeac0d4b65a4b6684ac84
SHA-256: 8988ca3c43e1744cfb6bfb72ad357c01cd2a983d1cfd209ca70e27936f1445b6
kernel-hugemem-unsupported-2.4.21-66.EL.i686.rpm     MD5: c68e3ed643d6087e99e3e08f7319a26d
SHA-256: d5d7edecb6ce2792713419a12c73e9a38a68cca2cfe7640bbaf4c0812b9d23e4
kernel-smp-2.4.21-66.EL.athlon.rpm     MD5: f128bddd770919410ac43369812c1c61
SHA-256: 64a53855754de3f7a5cadfd2de5997f424079c72aac9b3aed2df44c8079a9db8
kernel-smp-2.4.21-66.EL.i686.rpm     MD5: b28ed54c8d6fdf2dc137f41ce0ab44ef
SHA-256: 6ccc65e216cf8f68236476fe0db51b61f8c4cd6829552f5fa01a3cef5c1d94ec
kernel-smp-unsupported-2.4.21-66.EL.athlon.rpm     MD5: 7d7b90754245177f4c53087242dd5116
SHA-256: 2db00593856bf43af4931650adc18c09224c0922790f998d1691f7c9274c4b53
kernel-smp-unsupported-2.4.21-66.EL.i686.rpm     MD5: b6f3c481041c30a717af5127cdabebe3
SHA-256: fcdb76a67d2b3f4787ab56635871263661be35157604770b30edb2efcf79d8c5
kernel-source-2.4.21-66.EL.i386.rpm     MD5: 511beb13b80b87316580f2736eef7dc3
SHA-256: bae7d1c72cba00b3456a3c40ac8fbf61afa58a4e71ced8965ae4e935f0676bf9
kernel-unsupported-2.4.21-66.EL.athlon.rpm     MD5: 2d5f8fd15beb251fbec38cb8a25de47d
SHA-256: d107b0f612e6f18a2b792e7a3010c163e33a0a17743c745bcacca4565139795b
kernel-unsupported-2.4.21-66.EL.i686.rpm     MD5: 826e818eacb45ecae63dc432aff73a19
SHA-256: b68ace8d9da9e1d7b97889ddf7316ca5ce46cc0500cdbab47a437fd0e628ab13
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

529597 - CVE-2009-3620 kernel: r128 IOCTL NULL pointer dereferences when CCE state is uninitialised
539414 - CVE-2009-3080 kernel: gdth: Prevent negative offsets in ioctl
552126 - CVE-2009-4536 kernel: e1000 issue reported at 26c3
556909 - unresolved symbol sock_recvmsg_Rsmp_4c34ff14
577711 - CVE-2010-1188 kernel: ipv6: skb is unexpectedly freed
606611 - CVE-2010-2240 kernel: mm: keep a guard page below a grow-down stack segment
634457 - CVE-2010-3081 kernel: 64-bit Compatibility Mode Stack Pointer Underflow


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