U radu jezgre operacijskog sustava Ubuntu 10.10 uočeno je više sigurnosnih propusta. Zloćudni korisnik ranjivosti može iskoristiti za napad uskraćivanjem usluga te otkrivanje osjetljivih informacija.
Paket:
Linux kernel 2.6.x
Operacijski sustavi:
Ubuntu Linux 10.10
Kritičnost:
7.2
Problem:
cjelobrojno prepisivanje, pogreška u programskoj funkciji, pogreška u programskoj komponenti, preljev međuspremnika
Sigurnosne ranjivosti su posljedica pogrešaka u programskoj komponenti "RHEV Hypervisor", pogrešaka u funkcijama "is_gpt_valid" i "inet_diag_bc_audit", cjelobrojnog prepisivanja u "l2cap_config_req" te višestrukih preljeva međuspremnika.
Posljedica:
Napadač propuste može iskoristiti za DoS (eng. Denial of Service) napad te otkrivanje osjetljivih podataka.
Rješenje:
Svim se korisnicima navedenog programskog paketa savjetuje korištenje dostupnih programskih nadogradnji i zakrpa.
==========================================================================
Ubuntu Security Notice USN-1220-1
September 29, 2011
linux-ti-omap4 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 10.10
Summary:
Multiple kernel flaws have been fixed.
Software Description:
- linux-ti-omap4: Linux kernel for OMAP4
Details:
Ryan Sweat discovered that the kernel incorrectly handled certain VLAN
packets. On some systems, a remote attacker could send specially crafted
traffic to crash the system, leading to a denial of service.
(CVE-2011-1576)
Timo Warns discovered that the EFI GUID partition table was not correctly
parsed. A physically local attacker that could insert mountable devices
could exploit this to crash the system or possibly gain root privileges.
(CVE-2011-1776)
Dan Rosenberg discovered that the IPv4 diagnostic routines did not
correctly validate certain requests. A local attacker could exploit this to
consume CPU resources, leading to a denial of service. (CVE-2011-2213)
Dan Rosenberg discovered that the Bluetooth stack incorrectly handled
certain L2CAP requests. If a system was using Bluetooth, a remote attacker
could send specially crafted traffic to crash the system or gain root
privileges. (CVE-2011-2497)
Mauro Carvalho Chehab discovered that the si4713 radio driver did not
correctly check the length of memory copies. If this hardware was
available, a local attacker could exploit this to crash the system or gain
root privileges. (CVE-2011-2700)
Herbert Xu discovered that certain fields were incorrectly handled when
Generic Receive Offload (CVE-2011-2723)
Time Warns discovered that long symlinks were incorrectly handled on Be
filesystems. A local attacker could exploit this with a malformed Be
filesystem and crash the system, leading to a denial of service.
(CVE-2011-2928)
Dan Kaminsky discovered that the kernel incorrectly handled random sequence
number generation. An attacker could use this flaw to possibly predict
sequence numbers and inject packets. (CVE-2011-3188)
Darren Lavender discovered that the CIFS client incorrectly handled certain
large values. A remote attacker with a malicious server could exploit this
to crash the system or possibly execute arbitrary code as the root user.
(CVE-2011-3191)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 10.10:
linux-image-2.6.35-903-omap4 2.6.35-903.25
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1220-1
CVE-2011-1576, CVE-2011-1776, CVE-2011-2213, CVE-2011-2497,
CVE-2011-2700, CVE-2011-2723, CVE-2011-2928, CVE-2011-3188,
CVE-2011-3191
Package Information:
https://launchpad.net/ubuntu/+source/linux-ti-omap4/2.6.35-903.25
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