U radu jezgre operacijskog sustava uočeno je više sigurnosnih ranjivosti. Ove ranjivosti mogu dovesti do napada uskraćivanjem usluga (DoS), neovlaštenog pristupa i dobivanja većih ovlasti u sustavu.
Paket:
Linux kernel 2.6.x
Operacijski sustavi:
Ubuntu Linux 8.04
Kritičnost:
5.4
Problem:
neodgovarajuće rukovanje datotekama, neodgovarajuće rukovanje memorijom, pogreška u programskoj funkciji
Iskorištavanje:
lokalno
Posljedica:
dobivanje većih privilegija, neovlašteni pristup sustavu, uskraćivanje usluga (DoS)
Sigurnosne nepravilnosti se javljaju zbog neispravnog rukovanja AUN paketima, nepravilne provjere veličine spremnika, neodgovarajuće inicijalizacije memorije, itd.
Posljedica:
Ove sigurnosne ranjivosti lokalnom napadaču omogućuju DoS (eng. Denial of Service) napad, neovlašteni pristup te stjecanje root ovlasti.
Rješenje:
Svim se korisnicima, u svrhu zaštite sigurnosti, savjetuje korištenje dostupnih programskih nadogradnji.
==========================================================================
Ubuntu Security Notice USN-1133-1
May 24, 2011
linux vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 8.04 LTS
Summary:
Multiple flaws in the Linux kernel.
Software Description:
- linux: Linux kernel
Details:
Nelson Elhage discovered that Econet did not correctly handle AUN packets
over UDP. A local attacker could send specially crafted traffic to crash
the system, leading to a denial of service. (CVE-2010-4342)
Dan Rosenberg discovered that the OSS subsystem did not handle name
termination correctly. A local attacker could exploit this crash the system
or gain root privileges. (CVE-2010-4527)
Dan Rosenberg discovered that IRDA did not correctly check the size of
buffers. On non-x86 systems, a local attacker could exploit this to read
kernel heap memory, leading to a loss of privacy. (CVE-2010-4529)
Dan Carpenter discovered that the TTPCI DVB driver did not check certain
values during an ioctl. If the dvb-ttpci module was loaded, a local
attacker could exploit this to crash the system, leading to a denial of
service, or possibly gain root privileges. (CVE-2011-0521)
Dan Rosenberg discovered that XFS did not correctly initialize memory. A
local attacker could make crafted ioctl calls to leak portions of kernel
stack memory, leading to a loss of privacy. (CVE-2011-0711)
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 2.6.24-29.89
linux-image-2.6.24-29-generic 2.6.24-29.89
linux-image-2.6.24-29-hppa32 2.6.24-29.89
linux-image-2.6.24-29-hppa64 2.6.24-29.89
linux-image-2.6.24-29-itanium 2.6.24-29.89
linux-image-2.6.24-29-lpia 2.6.24-29.89
linux-image-2.6.24-29-lpiacompat 2.6.24-29.89
linux-image-2.6.24-29-mckinley 2.6.24-29.89
linux-image-2.6.24-29-openvz 2.6.24-29.89
linux-image-2.6.24-29-powerpc 2.6.24-29.89
linux-image-2.6.24-29-powerpc-smp 2.6.24-29.89
linux-image-2.6.24-29-powerpc64-smp 2.6.24-29.89
linux-image-2.6.24-29-rt 2.6.24-29.89
linux-image-2.6.24-29-server 2.6.24-29.89
linux-image-2.6.24-29-sparc64 2.6.24-29.89
linux-image-2.6.24-29-sparc64-smp 2.6.24-29.89
linux-image-2.6.24-29-virtual 2.6.24-29.89
linux-image-2.6.24-29-xen 2.6.24-29.89
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
CVE-2010-4342, CVE-2010-4527, CVE-2010-4529, CVE-2011-0521,
CVE-2011-0711
Package Information:
https://launchpad.net/ubuntu/+source/linux/2.6.24-29.89
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