U radu programskog paketa libav uočeno je više sigurnosnih propusta koje udaljeni napadač može iskoristiti za DoS (eng. Denial of Service) napad te proizvoljno pokretanje programskog koda.
Paket:
libav 4.x
Operacijski sustavi:
Ubuntu Linux 11.04
Kritičnost:
7.5
Problem:
neodgovarajuća provjera ulaznih podataka, pogreška u programskoj komponenti
Sigurnosne ranjivosti su posljedica pogrešne implementacije komponente "OGG container" te pogreške u datoteci "sp5xdec.c".
Posljedica:
Udaljeni napadač ranjivosti može iskoristiti za proizvoljno izvršavanje programskog koda te napad uskraćivanjem usluga (DoS). Zlouporaba podrazumijeva podmetanje posebno oblikovanih ogg, AMV te CAVS datoteka.
Rješenje:
Svim se korisnicima navedenog programskog paketa, u svrhu zaštite sigurnosti, savjetuje nadogradnja paketa na novije inačice.
==========================================================================
Ubuntu Security Notice USN-1209-2
September 19, 2011
libav vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.04
Summary:
Libav could be made to run programs as your login if it opened a specially
crafted file.
Software Description:
- libav: Multimedia player, server, encoder and transcoder
Details:
It was discovered that Libav incorrectly handled certain malformed ogg
files. If a user were tricked into opening a crafted ogg file, an attacker
could cause a denial of service via application crash, or possibly execute
arbitrary code with the privileges of the user invoking the program.
(CVE-2011-1196)
It was discovered that Libav incorrectly handled certain malformed AMV
files. If a user were tricked into opening a crafted AMV file, an attacker
could cause a denial of service via application crash, or possibly execute
arbitrary code with the privileges of the user invoking the program.
(CVE-2011-1931)
Emmanouel Kellinis discovered that Libav incorrectly handled certain
malformed CAVS files. If a user were tricked into opening a crafted CAVS
file, an attacker could cause a denial of service via application crash, or
possibly execute arbitrary code with the privileges of the user invoking
the program. (CVE-2011-3362)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.04:
libavcodec52 4:0.6.2-1ubuntu1.1
libavformat52 4:0.6.2-1ubuntu1.1
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1209-2
http://www.ubuntu.com/usn/usn-1209-1
CVE-2011-1196, CVE-2011-1931, CVE-2011-3362
Package Information:
https://launchpad.net/ubuntu/+source/libav/4:0.6.2-1ubuntu1.1
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