U radu jezgre operacijskog sustava Ubuntu Linux (linux-ti-omap4) otkrivene su višestruke sigurnosne ranjivosti. Lokalni, zlonamjerni korisnik ih može iskoristiti za izvođenje napada uskraćivanjem usluge (DoS) ili dobivanje ovlasti administratora.
Paket:
linux-ti-omap4
Operacijski sustavi:
Ubuntu Linux 11.04
Kritičnost:
5.8
Problem:
pogreška u programskoj funkciji, pogreška u programskoj komponenti
Iskorištavanje:
lokalno
Posljedica:
dobivanje većih privilegija, uskraćivanje usluga (DoS)
Ranjivosti su uzrokovane pogreškama u funkciji "udp6_ufo_fragment()", HFS i XFS datotečnim sustavima, nepravilnosti u "GHASH" algoritmu, itd. Za uvid u sve ranjivosti preporuča se čitanje izvorne preporuke.
Posljedica:
Napadaču spomenuti nedostaci omogućuju izvođenje DoS napada ili stjecanje root ovlasti.
Rješenje:
Korisnicima se savjetuje nadogradnja na ispravljenu inačicu.
==========================================================================
Ubuntu Security Notice USN-1304-1
December 13, 2011
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:
A bug was discovered in the XFS filesystem's handling of pathnames. A local
attacker could exploit this to crash the system, leading to a denial of
service, or gain root privileges. (CVE-2011-4077)
Nick Bowler discovered the kernel GHASH message digest algorithm
incorrectly handled error conditions. A local attacker could exploit this
to cause a kernel oops. (CVE-2011-4081)
Scot Doyle discovered that the bridge networking interface incorrectly
handled certain network packets. A remote attacker could exploit this to
crash the system, leading to a denial of service. (CVE-2011-4087)
A flaw was found in the Journaling Block Device (JBD). A local attacker
able to mount ext3 or ext4 file systems could exploit this to crash the
system, leading to a denial of service. (CVE-2011-4132)
A bug was found in the way headroom check was performed in
udp6_ufo_fragment() function. A remote attacker could use this flaw to
crash the system. (CVE-2011-4326)
Clement Lecigne discovered a bug in the HFS file system bounds checking.
When a malformed HFS file system is mounted a local user could crash the
system or gain root privileges. (CVE-2011-4330)
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 2.6.38-1209.18
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1304-1
CVE-2011-4077, CVE-2011-4081, CVE-2011-4087, CVE-2011-4132,
CVE-2011-4326, CVE-2011-4330
Package Information:
https://launchpad.net/ubuntu/+source/linux-ti-omap4/2.6.38-1209.18
Posljednje sigurnosne preporuke