U biblioteci t1lib uočeno je nekoliko ranjivosti koje zlonamjerni napadači mogu iskoristiti za proizvoljno izvršavanje programskog koda i napad uskraćivanjem usluga (DoS napad).
Paket:
t1lib 5.x
Operacijski sustavi:
Ubuntu Linux 10.04, Ubuntu Linux 10.10, Ubuntu Linux 11.04, Ubuntu Linux 11.10
==========================================================================
Ubuntu Security Notice USN-1335-1
January 19, 2012
t1lib 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
Summary:
t1lib could be made to crash or run programs as your login if it opened a
specially crafted font file.
Software Description:
- t1lib: Type 1 font rasterizer library - runtime
Details:
Jon Larimer discovered that t1lib did not properly parse AFM fonts. If a
user were tricked into using a specially crafted font file, a remote
attacker could cause t1lib to crash or possibly execute arbitrary code with
user privileges. (CVE-2010-2642, CVE-2011-0433)
Jonathan Brossard discovered that t1lib did not correctly handle certain
malformed font files. If a user were tricked into using a specially crafted
font file, a remote attacker could cause t1lib to crash. (CVE-2011-1552,
CVE-2011-1553, CVE-2011-1554)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.10:
libt1-5 5.1.2-3ubuntu0.11.10.2
Ubuntu 11.04:
libt1-5 5.1.2-3ubuntu0.11.04.2
Ubuntu 10.10:
libt1-5 5.1.2-3ubuntu0.10.10.2
Ubuntu 10.04 LTS:
libt1-5 5.1.2-3ubuntu0.10.04.2
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1335-1
CVE-2010-2642, CVE-2011-0433, CVE-2011-1552, CVE-2011-1553,
CVE-2011-1554
Package Information:
https://launchpad.net/ubuntu/+source/t1lib/5.1.2-3ubuntu0.11.10.2
https://launchpad.net/ubuntu/+source/t1lib/5.1.2-3ubuntu0.11.04.2
https://launchpad.net/ubuntu/+source/t1lib/5.1.2-3ubuntu0.10.10.2
https://launchpad.net/ubuntu/+source/t1lib/5.1.2-3ubuntu0.10.04.2
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