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                   Red Hat Security Advisory

Synopsis:          Moderate: kernel security update
Advisory ID:       RHSA-2007:0013-01
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2007-0013.html
Issue date:        2007-01-17
Updated on:        2007-01-17
Product:           Red Hat Enterprise Linux
CVE Names:         CVE-2006-2935 CVE-2006-4997 
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1. Summary:

Updated kernel packages that fix a number of security issues as well as
other bugs are now available for Red Hat Enterprise Linux 2.1 (32 bit
architectures)

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

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1 - i386
Red Hat Enterprise Linux ES version 2.1 - i386
Red Hat Enterprise Linux WS version 2.1 - i386

3. Problem description:

The Linux kernel handles the basic functions of the operating system.

These new kernel packages contain fixes for the security issues described
below:

* a flaw in the ATM subsystem affecting systems with installed ATM hardware
and configured ATM support that allowed a remote user to cause a denial of
service (panic) by accessing socket buffer memory after it has been freed
(CVE-2006-4997, Moderate)

* a flaw in the DVD handling of the CDROM driver that could be used
together with a custom built USB device to gain root privileges
(CVE-2006-2935, Moderate)

In addition to the security issues described above, the following bugs are
also addressed:

* a potential overflow condition when reading /proc/devices
* uninitialized memory in cdrom_init() that can lead to a crash at install time
* a potential page corruption bug in /proc/kcore
* a race condition when reading vmalloc()ed regions via /proc/kcore

All Red Hat Enterprise Linux 2.1 users are advised to upgrade their kernels
to these updated packages, which contain backported fixes to correct these
issues.

4. Solution:

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

This update is available via Red Hat Network.  To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

5. Bug IDs fixed (http://bugzilla.redhat.com/):

102095 - Panic occurs at the time of installation.
147666 - Memory corruption when reading /proc/kcore
156029 - kernel may oops if more  than 4k worth of string data returned in
 /proc/devices
197673 - CVE-2006-2935 Possible buffer overflow in DVD handling
207306 - CVE-2006-4997 IP over ATM clip_mkip dereference freed pointer
213567 - Access to unmapped vmalloc pages when reading proc/kcore

6. RPMs required:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/kernel-2.4.9-e.71.src.rpm
e24e685bd40cefc4624d4fd1a2576be9  kernel-2.4.9-e.71.src.rpm

i386:
2717477b65b013f4341e505b05cc2311  kernel-2.4.9-e.71.athlon.rpm
cfefd56a803b58d4fc0f7a9e5cbde814  kernel-2.4.9-e.71.i686.rpm
f4a07ecbd5a20fd5e926f0bd48a57893  kernel-BOOT-2.4.9-e.71.i386.rpm
84208388bdb8fed407d4d54788df3714  kernel-debug-2.4.9-e.71.i686.rpm
8d9dfa5bc3f02fc5b64f159c85e6da3c  kernel-doc-2.4.9-e.71.i386.rpm
83c1fd68611302157486110a73cb27dc  kernel-enterprise-2.4.9-e.71.i686.rpm
9c84e5cdb3bc6d75617fb5a4149673f1  kernel-headers-2.4.9-e.71.i386.rpm
a4beb1aa891f3dab4b2db9bd33ca89dc  kernel-smp-2.4.9-e.71.athlon.rpm
1697645d1da8fe51a74fff9be90136dd  kernel-smp-2.4.9-e.71.i686.rpm
b0856883d1737dd9bdbce18868538e63  kernel-source-2.4.9-e.71.i386.rpm
cc8345617fc9877ea529c3a7dc37ab83  kernel-summit-2.4.9-e.71.i686.rpm

Red Hat Enterprise Linux ES version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1ES/en/os/SRPMS/kernel-2.4.9-e.71.src.rpm
e24e685bd40cefc4624d4fd1a2576be9  kernel-2.4.9-e.71.src.rpm

i386:
2717477b65b013f4341e505b05cc2311  kernel-2.4.9-e.71.athlon.rpm
cfefd56a803b58d4fc0f7a9e5cbde814  kernel-2.4.9-e.71.i686.rpm
f4a07ecbd5a20fd5e926f0bd48a57893  kernel-BOOT-2.4.9-e.71.i386.rpm
84208388bdb8fed407d4d54788df3714  kernel-debug-2.4.9-e.71.i686.rpm
8d9dfa5bc3f02fc5b64f159c85e6da3c  kernel-doc-2.4.9-e.71.i386.rpm
9c84e5cdb3bc6d75617fb5a4149673f1  kernel-headers-2.4.9-e.71.i386.rpm
a4beb1aa891f3dab4b2db9bd33ca89dc  kernel-smp-2.4.9-e.71.athlon.rpm
1697645d1da8fe51a74fff9be90136dd  kernel-smp-2.4.9-e.71.i686.rpm
b0856883d1737dd9bdbce18868538e63  kernel-source-2.4.9-e.71.i386.rpm

Red Hat Enterprise Linux WS version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1WS/en/os/SRPMS/kernel-2.4.9-e.71.src.rpm
e24e685bd40cefc4624d4fd1a2576be9  kernel-2.4.9-e.71.src.rpm

i386:
2717477b65b013f4341e505b05cc2311  kernel-2.4.9-e.71.athlon.rpm
cfefd56a803b58d4fc0f7a9e5cbde814  kernel-2.4.9-e.71.i686.rpm
f4a07ecbd5a20fd5e926f0bd48a57893  kernel-BOOT-2.4.9-e.71.i386.rpm
84208388bdb8fed407d4d54788df3714  kernel-debug-2.4.9-e.71.i686.rpm
8d9dfa5bc3f02fc5b64f159c85e6da3c  kernel-doc-2.4.9-e.71.i386.rpm
83c1fd68611302157486110a73cb27dc  kernel-enterprise-2.4.9-e.71.i686.rpm
9c84e5cdb3bc6d75617fb5a4149673f1  kernel-headers-2.4.9-e.71.i386.rpm
a4beb1aa891f3dab4b2db9bd33ca89dc  kernel-smp-2.4.9-e.71.athlon.rpm
1697645d1da8fe51a74fff9be90136dd  kernel-smp-2.4.9-e.71.i686.rpm
b0856883d1737dd9bdbce18868538e63  kernel-source-2.4.9-e.71.i386.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:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2935
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4997
http://www.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2007 Red Hat, Inc.
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