U radu jezgre operacijskog sustava Ubuntu uočeni su višestruki sigurnosni nedostaci koji napadaču omogućuju stjecanje povećanih ovlasti, otkrivanje osjetljivih informacija te izvođenje DoS (eng. Denial of Service) napada.
Paket:
Linux kernel 2.6.x
Operacijski sustavi:
Ubuntu Linux 8.04
Kritičnost:
5.8
Problem:
pogreška u programskoj funkciji, pogreška u programskoj komponenti, preljev međuspremnika
Iskorištavanje:
lokalno
Posljedica:
dobivanje većih privilegija, otkrivanje osjetljivih informacija, uskraćivanje usluga (DoS)
Propusti su posljedica pogrešaka u funkcijama "ocfs2_prepare_page_for_write", "cm_work_handler", "ldm_parse_vmdb", "ldm_frag_add", "next_pidmap", višestrukih prepisivanja spremnika u "caiaq Native Instruments USB" upravljačkom programu, itd.
Posljedica:
Lokalni napadač može iskoristiti navedene ranjivosti za izvođenje napada uskraćivanja usluge, stjecanje povećanih ovlasti te otkrivanje osjetljivih informacija.
==========================================================================
Ubuntu Security Notice USN-1146-1
June 09, 2011
linux vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 8.04 LTS
Summary:
Multiple flaws fixed in the Linux kernel.
Software Description:
- linux: Linux kernel
Details:
Kees Cook discovered that some ethtool functions did not correctly clear
heap memory. A local attacker with CAP_NET_ADMIN privileges could exploit
this to read portions of kernel heap memory, leading to a loss of privacy.
(CVE-2010-4655)
Kees Cook discovered that the IOWarrior USB device driver did not correctly
check certain size fields. A local attacker with physical access could plug
in a specially crafted USB device to crash the system or potentially gain
root privileges. (CVE-2010-4656)
Goldwyn Rodrigues discovered that the OCFS2 filesystem did not correctly
clear memory when writing certain file holes. A local attacker could
exploit this to read uninitialized data from the disk, leading to a loss of
privacy. (CVE-2011-0463)
Jens Kuehnel discovered that the InfiniBand driver contained a race
condition. On systems using InfiniBand, a local attacker could send
specially crafted requests to crash the system, leading to a denial of
service. (CVE-2011-0695)
Rafael Dominguez Vega discovered that the caiaq Native Instruments USB
driver did not correctly validate string lengths. A local attacker with
physical access could plug in a specially crafted USB device to crash the
system or potentially gain root privileges. (CVE-2011-0712)
Timo Warns discovered that LDM partition parsing routines did not correctly
calculate block counts. A local attacker with physical access could plug in
a specially crafted block device to crash the system, leading to a denial
of service. (CVE-2011-1012)
Timo Warns discovered that the LDM disk partition handling code did not
correctly handle certain values. By inserting a specially crafted disk
device, a local attacker could exploit this to gain root privileges.
(CVE-2011-1017)
Tavis Ormandy discovered that the pidmap function did not correctly handle
large requests. A local attacker could exploit this to crash the system,
leading to a denial of service. (CVE-2011-1593)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 8.04 LTS:
linux-image-2.6.24-29-386 2.6.24-29.90
linux-image-2.6.24-29-generic 2.6.24-29.90
linux-image-2.6.24-29-hppa32 2.6.24-29.90
linux-image-2.6.24-29-hppa64 2.6.24-29.90
linux-image-2.6.24-29-itanium 2.6.24-29.90
linux-image-2.6.24-29-lpia 2.6.24-29.90
linux-image-2.6.24-29-lpiacompat 2.6.24-29.90
linux-image-2.6.24-29-mckinley 2.6.24-29.90
linux-image-2.6.24-29-openvz 2.6.24-29.90
linux-image-2.6.24-29-powerpc 2.6.24-29.90
linux-image-2.6.24-29-powerpc-smp 2.6.24-29.90
linux-image-2.6.24-29-powerpc64-smp 2.6.24-29.90
linux-image-2.6.24-29-rt 2.6.24-29.90
linux-image-2.6.24-29-server 2.6.24-29.90
linux-image-2.6.24-29-sparc64 2.6.24-29.90
linux-image-2.6.24-29-sparc64-smp 2.6.24-29.90
linux-image-2.6.24-29-virtual 2.6.24-29.90
linux-image-2.6.24-29-xen 2.6.24-29.90
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
CVE-2010-4655, CVE-2010-4656, CVE-2011-0463, CVE-2011-0695,
CVE-2011-0712, CVE-2011-1012, CVE-2011-1017, CVE-2011-1593
Package Information:
https://launchpad.net/ubuntu/+source/linux/2.6.24-29.90
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