Problem se javlja zbog neodgovarajućeg rukovanja određenim Type1 datotekama fontova u psaux/t1decode.c.
Posljedica:
Korisnik, prevarom naveden na korištenje zlonamjerno oblikovanog fonta, može omogućiti udaljenom napadaču da izvede DoS napad ili pokrene proizvoljni programski kod.
Rješenje:
Svi se korisnici upućuju na korištenje dostupne programske nadogradnje.
==========================================================================
Ubuntu Security Notice USN-1173-1
July 25, 2011
freetype vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.04
- Ubuntu 10.10
Summary:
FreeType could be made to run programs as your login if it opened a
specially crafted font file.
Software Description:
- freetype: FreeType 2 is a font engine library
Details:
It was discovered that FreeType did not correctly handle certain malformed
Type 1 font files. If a user were tricked into using a specially crafted
font file, a remote attacker could cause FreeType to crash or possibly
execute arbitrary code with user privileges.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.04:
libfreetype6 2.4.4-1ubuntu2.1
Ubuntu 10.10:
libfreetype6 2.4.2-2ubuntu0.2
After a standard system update you need to restart your session to make
all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1173-1
CVE-2011-0226
Package Information:
https://launchpad.net/ubuntu/+source/freetype/2.4.4-1ubuntu2.1
https://launchpad.net/ubuntu/+source/freetype/2.4.2-2ubuntu0.2
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