U radu jezgre operacijskog sustava Linux za OMAP4 uočeno je nekoliko sigurnosnih propusta. Napadači ih mogu iskoristiti za izvođenje DoS (eng. Denial of Service) napada te stjecanje većih ovlasti.
Paket:
linux-ti-omap4
Operacijski sustavi:
Ubuntu Linux 11.04
Kritičnost:
8.1
Problem:
pogreška u programskoj komponenti
Iskorištavanje:
lokalno/udaljeno
Posljedica:
dobivanje većih privilegija, uskraćivanje usluga (DoS)
Propusti su posljedica nepravilnog rukovanja IPv4 icmp paketima, LDM particijama, pogreškom u sigurnosnom sučelju AppArmor, itd. Za uvid u sve propuste savjetuje se čitanje izvorne preporuke.
Posljedica:
Napadaču omogućuju izvođenje DoS napada i stjecanje root ovlasti.
Rješenje:
Korisnicima se savjetuje prelazak na ispravljenu inačicu.
==========================================================================
Ubuntu Security Notice USN-1383-1
March 06, 2012
linux-ti-omap4 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.04
Summary:
Several security issues were fixed in the kernel.
Software Description:
- linux-ti-omap4: Linux kernel for OMAP4
Details:
Aristide Fattori and Roberto Paleari reported a flaw in the Linux kernel's
handling of IPv4 icmp packets. A remote user could exploit this to cause a
denial of service. (CVE-2011-1927)
Dan Rosenberg reported an error in the old ABI compatibility layer of ARM
kernels. A local attacker could exploit this flaw to cause a denial of
service or gain root privileges. (CVE-2011-1759)
Ben Hutchings reported a flaw in the kernel's handling of corrupt LDM
partitions. A local user could exploit this to cause a denial of service or
escalate privileges. (CVE-2011-2182)
The linux kernel did not properly account for PTE pages when deciding which
task to kill in out of memory conditions. A local, unprivileged could
exploit this flaw to cause a denial of service. (CVE-2011-2498)
A flaw was discovered in the TOMOYO LSM's handling of mount system calls.
An unprivileged user could oops the system causing a denial of service.
(CVE-2011-2518)
A flaw was discovered in the Linux kernel's AppArmor security interface
when invalid information was written to it. An unprivileged local user
could use this to cause a denial of service on the system. (CVE-2011-3619)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.04:
linux-image-2.6.38-1209-omap4 2.6.38-1209.22
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1383-1
CVE-2011-1759, CVE-2011-1927, CVE-2011-2182, CVE-2011-2498,
CVE-2011-2518, CVE-2011-3619
Package Information:
https://launchpad.net/ubuntu/+source/linux-ti-omap4/2.6.38-1209.22
Posljednje sigurnosne preporuke