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RedHat: 'kernel' Multiple vulnerabilities Print E-mail
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Posted by LinuxSecurity.com Team   
RedHat Linux This kernel update also fixes a difficult to trigger race inthe dcache (filesystem cache) code, as well as some potential securityholes, although we are not currently aware of any exploits.

---------------------------------------------------------------------
                   Red Hat, Inc. Red Hat Security Advisory

Synopsis:          New kernel update available, fixes i810 video oops, several security issues
Advisory ID:       RHSA-2002:158-09
Issue date:        2002-07-26
Updated on:        2002-08-20
Product:           Red Hat Linux
Keywords:          
Cross references:  
Obsoletes:         RHBA-2002:110
---------------------------------------------------------------------

1. Topic:

Updated kernel packages are now available which fix an oops in the i810 3D
kernel code. This kernel update also fixes a difficult to trigger race in
the dcache (filesystem cache) code, as well as some potential security
holes, although we are not currently aware of any exploits.

2. Relevant releases/architectures:

Red Hat Linux 7.3 - athlon, i386, i586, i686

3. Problem description:

The 2.4.18-5 kernel introduced some safety checks in the VM subsystem that
were triggered when exiting an X session while using 3D acceleration with
the Intel i810/i815 chipset. Additionally, there was a difficult to trigger
race in the dcache of the file system subsystem.

This kernel update addresses both of these issues.

In addition, there are fixes for potential security holes in the following
drivers:

stradis
rio500
se401
usbvideo
apm

Finally, this kernel fixes a few files in the /proc file system which had
the capability to expose kernel memory when abused.

All of the security issues found during an audit and none of them,  at the
time of this writing, have any known exploits.

We would like to thank Silvio Cesare, Stas Sergeev, Andi Kleen, Solar
Designer, and others for their auditing work.

4. Solution:

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

The procedure for upgrading the kernel manually is documented at:
 
http://www.Red Hat.com/support/docs/howto/kernel-upgrade/

Please read the directions for your architecture carefully before
proceeding with the kernel upgrade.

Please note that this update is also available via Red Hat Network. Many
people find this to be an easier way to apply updates. 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. Note that you need to select the kernel
explicitly on default configurations of up2date.

5. RPMs required:

Red Hat Linux 7.3:

SRPMS: 
ftp://updates.Red Hat.com/7.3/en/os/SRPMS/kernel-2.4.18-10.src.rpm

athlon: 
ftp://updates.Red Hat.com/7.3/en/os/athlon/kernel-2.4.18-10.athlon.rpm 
ftp://updates.Red Hat.com/7.3/en/os/athlon/kernel-smp-2.4.18-10.athlon.rpm

i386: 
ftp://updates.Red Hat.com/7.3/en/os/i386/kernel-2.4.18-10.i386.rpm 
ftp://updates.Red Hat.com/7.3/en/os/i386/kernel-source-2.4.18-10.i386.rpm 
ftp://updates.Red Hat.com/7.3/en/os/i386/kernel-doc-2.4.18-10.i386.rpm 
ftp://updates.Red Hat.com/7.3/en/os/i386/kernel-BOOT-2.4.18-10.i386.rpm

i586: 
ftp://updates.Red Hat.com/7.3/en/os/i586/kernel-2.4.18-10.i586.rpm 
ftp://updates.Red Hat.com/7.3/en/os/i586/kernel-smp-2.4.18-10.i586.rpm

i686: 
ftp://updates.Red Hat.com/7.3/en/os/i686/kernel-2.4.18-10.i686.rpm 
ftp://updates.Red Hat.com/7.3/en/os/i686/kernel-smp-2.4.18-10.i686.rpm 
ftp://updates.Red Hat.com/7.3/en/os/i686/kernel-bigmem-2.4.18-10.i686.rpm 
ftp://updates.Red Hat.com/7.3/en/os/i686/kernel-debug-2.4.18-10.i686.rpm



6. Verification:

MD5 sum                          Package Name
--------------------------------------------------------------------------
4473420c7f9bf2b9c83e6c1ec69f597f 7.3/en/os/SRPMS/kernel-2.4.18-10.src.rpm
1b836ea01aa4aef62cc3c185e8547952 7.3/en/os/athlon/kernel-2.4.18-10.athlon.rpm
b88c661fddd81194503be2acd168bff5 7.3/en/os/athlon/kernel-smp-2.4.18-10.athlon.rpm
b2bacd0954832353ecddb507f087b338 7.3/en/os/i386/kernel-2.4.18-10.i386.rpm
d105a7cc4d3e21bc9c5ace02f0b0152e 7.3/en/os/i386/kernel-BOOT-2.4.18-10.i386.rpm
91a1978068ee80c53a7500d4486b66e4 7.3/en/os/i386/kernel-doc-2.4.18-10.i386.rpm
51bc76e8c016e00aa26d798a85f53759 7.3/en/os/i386/kernel-source-2.4.18-10.i386.rpm
2cd340835d9acb309ccd61cb7581fc2d 7.3/en/os/i586/kernel-2.4.18-10.i586.rpm
a0925e2445b68abe21225a4d3842c1a2 7.3/en/os/i586/kernel-smp-2.4.18-10.i586.rpm
32b3df55a27018ea85cf8ebcad6186dd 7.3/en/os/i686/kernel-2.4.18-10.i686.rpm
96df823d6e481142b446f278abb91a70 7.3/en/os/i686/kernel-bigmem-2.4.18-10.i686.rpm
2c3ac524c7da4188905a28a37acd8afd 7.3/en/os/i686/kernel-debug-2.4.18-10.i686.rpm
51ba272488114c3b61d7c0fdc63ee04b 7.3/en/os/i686/kernel-smp-2.4.18-10.i686.rpm


These packages are GPG signed by Red Hat, Inc. for security.  Our key
is available at:
     http://www.Red Hat.com/about/contact/pgpkey.html

You can verify each package with the following command:
    rpm --checksig  

If you only wish to verify that each package has not been corrupted or
tampered with, examine only the md5sum with the following command:
    rpm --checksig --nogpg 


7. References:
 
http://www.thefreeworld.net/non-US/


Copyright(c) 2000, 2001, 2002 Red Hat, Inc.


 
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