RHSA-2008:0129-5

先日の Linux kernel の local exploit の件 ですが、Red hat が Errata を出しました。

Updated kernel packages that fix a security issue are now available for Red Hat Enterprise Linux 5.

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

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

A flaw was found in vmsplice. An unprivileged local user could use this flaw to gain root privileges. (CVE-2008-0600)

Red Hat is aware that a public exploit for this issue is available. This issue did not affect the Linux kernels distributed with Red Hat Enterprise Linux 2.1, 3, or 4.

Red Hat Enterprise Linux 5 users are advised to upgrade to these updated packages, which contain a backported patch to resolve this issue.

RHSA-2008:0129-5


CentOS 5.1 も 24〜48時間以内に update package が出てくることでしょう。
出ました。

CentOS Errata and Security Advisory 2008:0129

https://rhn.redhat.com/errata/RHSA-2008-0129.html

The following updated files have been uploaded and are currently
syncing to the mirrors:

i386:
kernel-2.6.18-53.1.13.el5.i686.rpm
kernel-devel-2.6.18-53.1.13.el5.i686.rpm
kernel-doc-2.6.18-53.1.13.el5.noarch.rpm
kernel-headers-2.6.18-53.1.13.el5.i386.rpm
kernel-PAE-2.6.18-53.1.13.el5.i686.rpm
kernel-PAE-devel-2.6.18-53.1.13.el5.i686.rpm
kernel-xen-2.6.18-53.1.13.el5.i686.rpm
kernel-xen-devel-2.6.18-53.1.13.el5.i686.rpm

src:
kernel-2.6.18-53.1.13.el5.src.rpm

http://lists.centos.org/pipermail/centos-announce/2008-February/014684.html

yum update で更新できます。検証コードですが

[foo@test ~]$ ./hoge 
                                                                    • -
Linux vmsplice Local Root Exploit By qaaz
                                                                    • -
[+] mmap: 0x0 .. 0x1000 [+] page: 0x0 [+] page: 0x20 [+] mmap: 0x4000 .. 0x5000 [+] page: 0x4000 [+] page: 0x4020 [+] mmap: 0x1000 .. 0x2000 [+] page: 0x1000 [+] mmap: 0xb7ef8000 .. 0xb7f2a000 [-] vmsplice: Bad address [foo@test ~]$

となり、このカーネルで問題は解消されたようです。良かった×2。

ちなみに Debian GNU/Linux

に情報があるそうです(Thanks! Mr. K)。