U radu programskog paketa Update Manager uočena su dva nova sigurnosna propusta. Napadač spomenute propuste može iskoristiti za izmjenu proizvoljnih podataka te otkrivanje osjetljivih informacija.
Paket:
update-manager 0.x
Operacijski sustavi:
Ubuntu Linux 8.04, Ubuntu Linux 10.04, Ubuntu Linux 10.10, Ubuntu Linux 11.04, Ubuntu Linux 11.10
izmjena podataka, otkrivanje osjetljivih informacija
Rješenje:
programska zakrpa proizvođača
CVE:
CVE-2011-3152, CVE-2011-3154
Izvorni ID preporuke:
USN-1284-1
Izvor:
Ubuntu
Problem:
Sigurnosni propusti se javljaju zbog prihvata određenih nadogradnji bez provjere GPG (eng. GNU Privacy Guard) potpisa te zbog stvaranja privremenog direktorija na nesiguran način.
Posljedica:
Zloćudni korisnik navedene ranjivosti može iskoristiti za izmjenu proizvoljnih datoteka i čitanje XAUTHORITY datoteke.
Rješenje:
Rješenje problema sigurnosti je korištenje dostupnih programskih nadogradnji i zakrpa.
==========================================================================
Ubuntu Security Notice USN-1284-1
November 28, 2011
update-manager vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS
Summary:
Update Manager could be made to overwrite files as the administrator.
Software Description:
- update-manager: GNOME application that manages apt updates
- update-notifier: Daemon which notifies about package updates
Details:
David Black discovered that Update Manager incorrectly extracted the
downloaded upgrade tarball before verifying its GPG signature. If a remote
attacker were able to perform a man-in-the-middle attack, this flaw could
potentially be used to replace arbitrary files. (CVE-2011-3152)
David Black discovered that Update Manager created a temporary directory
in an insecure fashion. A local attacker could possibly use this flaw to
read the XAUTHORITY file of the user performing the upgrade.
(CVE-2011-3154)
This update also adds a hotfix to Update Notifier to handle cases where the
upgrade is being performed from CD media.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.10:
update-manager 1:0.152.25.5
Ubuntu 11.04:
update-manager 1:0.150.5.1
update-notifier 0.111ubuntu2.1
Ubuntu 10.10:
update-manager 1:0.142.23.1
update-notifier 0.105ubuntu1.1
Ubuntu 10.04 LTS:
auto-upgrade-tester 1:0.134.11.1
update-notifier 0.99.3ubuntu0.1
Ubuntu 8.04 LTS:
update-manager 1:0.87.31.1
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1284-1
CVE-2011-3152, CVE-2011-3154
Package Information:
https://launchpad.net/ubuntu/+source/update-manager/1:0.152.25.5
https://launchpad.net/ubuntu/+source/update-manager/1:0.150.5.1
https://launchpad.net/ubuntu/+source/update-notifier/0.111ubuntu2.1
https://launchpad.net/ubuntu/+source/update-manager/1:0.142.23.1
https://launchpad.net/ubuntu/+source/update-notifier/0.105ubuntu1.1
https://launchpad.net/ubuntu/+source/update-manager/1:0.134.11.1
https://launchpad.net/ubuntu/+source/update-notifier/0.99.3ubuntu0.1
https://launchpad.net/ubuntu/+source/update-manager/1:0.87.31.1
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