Ispravljeni su višestruki sigurnosni propusti u radu jezgre operacijskog sustava (linux-lts-backport-maverick) za Ubuntu 10.04 LTS. Zlonamjerni ih korisnici mogu iskoristiti za izvođenje DoS napada i pokretanje proizvoljnog programskog koda.
Paket:
Linux kernel 2.6.x
Operacijski sustavi:
Ubuntu Linux 10.04
Kritičnost:
8.1
Problem:
cjelobrojno prepisivanje, pogreška u programskoj komponenti
Propusti su uzrokovani prepisivanjem cijelog broja, pogrešaka u FUSE modulu, XFS datotečnom sustavu i komponenti Programmable Interval Timer (PIT), itd. Za detaljniji uvid u sve propuste savjetuje se čitanje izvornog upozorenja.
Posljedica:
Napadačima spomenuti nedostaci omogućuju izvršavanje proizvoljnog programskog koda i izvođenje napada uskraćivanjem usluge.
Rješenje:
Korisnicima se savjetuje korištenje novih programskih rješenja.
==========================================================================
Ubuntu Security Notice USN-1387-1
March 06, 2012
linux-lts-backport-maverick vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 10.04 LTS
Summary:
Several security issues were fixed in the kernel.
Software Description:
- linux-lts-backport-maverick: Linux kernel backport from Maverick
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)
A flaw was found in the Linux Ethernet bridge's handling of IGMP (Internet
Group Management Protocol) packets. An unprivileged local user could
exploit this flaw to crash the system. (CVE-2011-0716)
Han-Wen Nienhuys reported a flaw in the FUSE kernel module. A local user
who can mount a FUSE file system could cause a denial of service.
(CVE-2011-3353)
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)
A flaw was found in KVM's Programmable Interval Timer (PIT). When a virtual
interrupt control is not available a local user could use this to cause a
denial of service by starting a timer. (CVE-2011-4622)
A flaw was discovered in the XFS filesystem. If a local user mounts a
specially crafted XFS image it could potential execute arbitrary code on
the system. (CVE-2012-0038)
Chen Haogang discovered an integer overflow that could result in memory
corruption. A local unprivileged user could use this to crash the system.
(CVE-2012-0044)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 10.04 LTS:
linux-image-2.6.35-32-generic 2.6.35-32.66~lucid1
linux-image-2.6.35-32-generic-pae 2.6.35-32.66~lucid1
linux-image-2.6.35-32-server 2.6.35-32.66~lucid1
linux-image-2.6.35-32-virtual 2.6.35-32.66~lucid1
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1387-1
CVE-2011-0716, CVE-2011-1927, CVE-2011-3353, CVE-2011-3619,
CVE-2011-4622, CVE-2012-0038, CVE-2012-0044
Package Information:
https://launchpad.net/ubuntu/+source/linux-lts-backport-maverick/2.6.35-32.66~lucid1
Posljednje sigurnosne preporuke