Wednesday, August 19, 2009

Security Updates : Kernels

The kernel stock in Slackware-Current has been patched to fix security problems and the kernel config option has enhanced to use 4096 in CONFIG_DEFAULT_MMAP_MIN_ADDR. Some packages were upgraded as well, such as pkgtool, libzip, pinentry, and foomatic-filters. One package is added, which is x11-ssh-askpass.

Here's the latest -Current changelog:
Tue Aug 18 18:50:46 CDT 2009
Patched kernels and kernel packages for Linux 2.6.29.6 to address a bug in proto_ops structures which could allow a user to use the kernel sendpage operation to execute arbitrary code in page zero.
This could allow local users to gain escalated privileges.
This flaw was discovered by Tavis Ormandy and Julien Tinnes of the Google Security Team.
For more information, see:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2692
In addition, these kernels change the CONFIG_DEFAULT_MMAP_MIN_ADDR kernel config option value to 4096, which should prevent the execution of arbitrary code by future NULL dereference bugs that might be found in the kernel. If you are compiling your own kernel, please check this option in your .config. If it is set to =0, you may wish to edit it to 4096 (or some other value > 0) and then reconfigure, or the kernel will not have default protection against zero page attacks from
userspace.
(* Security fix *)

a/kernel-firmware-2.6.29.6-noarch-1.txz: Rebuilt.

a/kernel-generic-2.6.29.6-i486-1.txz: Rebuilt.
Patched CVE-2009-2692, changed default vm.mmap_min_addr to 4096.
(* Security fix *)

a/kernel-generic-smp-2.6.29.6_smp-i686-1.txz: Rebuilt.
Patched CVE-2009-2692, changed default vm.mmap_min_addr to 4096.
(* Security fix *)

a/kernel-huge-2.6.29.6-i486-1.txz: Rebuilt.
Patched CVE-2009-2692, changed default vm.mmap_min_addr to 4096.
(* Security fix *)

a/kernel-huge-smp-2.6.29.6_smp-i686-1.txz: Rebuilt.
Patched CVE-2009-2692, changed default vm.mmap_min_addr to 4096.
(* Security fix *)

a/kernel-modules-2.6.29.6-i486-1.txz: Rebuilt.

a/kernel-modules-smp-2.6.29.6_smp-i686-1.txz: Rebuilt.

a/pkgtools-13.0-noarch-3.tgz: Rebuilt.
Fixed hardcoded gzip in installpkg --warn. Thanks to Mathieu Bouillaguet.
Fixed upgradepkg to reject invalid extensions. Thanks to Andrew Psaltis.

ap/foomatic-filters-4.0.2-i486-1.txz: Upgraded.

d/kernel-headers-2.6.29.6_smp-x86-1.txz: Rebuilt.

k/kernel-source-2.6.29.6_smp-noarch-1.txz: Rebuilt.
Patched CVE-2009-2692, changed default vm.mmap_min_addr to 4096.
(* Security fix *)

l/libzip-0.9-i486-2.txz: Rebuilt. Get rid of hardlinked man pages.

n/pinentry-0.7.6-i486-1.txz: Upgraded. Thanks to Stuart Winter.

xap/x11-ssh-askpass-1.2.4.1-i486-1.txz: Added.
Thanks to Vincent Batts for the build script.

extra/linux-2.6.29.6-nosmp-sdk/: Regenerated SMP to no-SMP kernel source patch.

isolinux/initrd.img: Rebuilt.
Patched CVE-2009-2692, changed default vm.mmap_min_addr to 4096.
(* Security fix *)

kernels/*: Rebuilt.
Patched CVE-2009-2692, changed default vm.mmap_min_addr to 4096.
(* Security fix *)

usb-and-pxe-installers/: Rebuilt.
Patched CVE-2009-2692, changed default vm.mmap_min_addr to 4096.
(* Security fix *)