Kod programskog paketa libpng uočene su višestruke sigurnosne ranjivosti koje zlonamjernim korisnicima omogućuju pokretanje napada uskraćivanja usluge ili izvršavanje proizvoljnog programskog koda.
Neke od ranjivosti javljaju se zbog preljeva međuspremnika te pogrešnog rukovanja memorijom do kojeg dolazi prilikom obrade određenih PNG slikovnih datoteka.
Posljedica:
Udaljeni, zlonamjerni korisnici mogu iskoristiti ove nedostatke za pokretanje DoS napada ili izvršavanje proizvoljnog programskog koda.
Rješenje:
Objavljena su rješenja koja ispravljaju navedene ranjivosti te se svim korisnicima savjetuje njihova primjena.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
=====================================================================
Red Hat Security Advisory
Synopsis: Moderate: libpng security update
Advisory ID: RHSA-2011:1105-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-1105.html
Issue date: 2011-07-28
CVE Names: CVE-2011-2501 CVE-2011-2690 CVE-2011-2692
=====================================================================
1. Summary:
Updated libpng packages that fix multiple security issues are now available
for Red Hat Enterprise Linux 6.
The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) - x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64
3. Description:
The libpng packages contain a library of functions for creating and
manipulating PNG (Portable Network Graphics) image format files.
A buffer overflow flaw was found in the way libpng processed certain PNG
image files. An attacker could create a specially-crafted PNG image that,
when opened, could cause an application using libpng to crash or,
potentially, execute arbitrary code with the privileges of the user running
the application. (CVE-2011-2690)
Note: The application behavior required to exploit CVE-2011-2690 is rarely
used. No application shipped with Red Hat Enterprise Linux behaves this
way, for example.
An out-of-bounds memory read flaw was found in the way libpng processed
certain PNG image files. An attacker could create a specially-crafted PNG
image that, when opened, could cause an application using libpng to crash.
(CVE-2011-2501)
An uninitialized memory read issue was found in the way libpng processed
certain PNG images that use the Physical Scale (sCAL) extension. An
attacker could create a specially-crafted PNG image that, when opened,
could cause an application using libpng to crash. (CVE-2011-2692)
Users of libpng should upgrade to these updated packages, which upgrade
libpng to version 1.2.46 to correct these issues. All running applications
using libpng must be restarted for the update to take effect.
4. Solution:
Before applying this update, make sure all previously-released errata
relevant to your system have been applied.
This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259
5. Bugs fixed (http://bugzilla.redhat.com/):
717084 - CVE-2011-2501 libpng: regression of CVE-2004-0421 in 1.2.23+
720607 - CVE-2011-2690 libpng: buffer overwrite in png_rgb_to_gray
720612 - CVE-2011-2692 libpng: Invalid read when handling empty sCAL chunks
6. Package List:
Red Hat Enterprise Linux Desktop (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/libpng-1.2.46-1.el6_1.src.rpm
i386:
libpng-1.2.46-1.el6_1.i686.rpm
libpng-debuginfo-1.2.46-1.el6_1.i686.rpm
x86_64:
libpng-1.2.46-1.el6_1.i686.rpm
libpng-1.2.46-1.el6_1.x86_64.rpm
libpng-debuginfo-1.2.46-1.el6_1.i686.rpm
libpng-debuginfo-1.2.46-1.el6_1.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/libpng-1.2.46-1.el6_1.src.rpm
i386:
libpng-debuginfo-1.2.46-1.el6_1.i686.rpm
libpng-devel-1.2.46-1.el6_1.i686.rpm
libpng-static-1.2.46-1.el6_1.i686.rpm
x86_64:
libpng-debuginfo-1.2.46-1.el6_1.i686.rpm
libpng-debuginfo-1.2.46-1.el6_1.x86_64.rpm
libpng-devel-1.2.46-1.el6_1.i686.rpm
libpng-devel-1.2.46-1.el6_1.x86_64.rpm
libpng-static-1.2.46-1.el6_1.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/libpng-1.2.46-1.el6_1.src.rpm
x86_64:
libpng-1.2.46-1.el6_1.i686.rpm
libpng-1.2.46-1.el6_1.x86_64.rpm
libpng-debuginfo-1.2.46-1.el6_1.i686.rpm
libpng-debuginfo-1.2.46-1.el6_1.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/libpng-1.2.46-1.el6_1.src.rpm
x86_64:
libpng-debuginfo-1.2.46-1.el6_1.i686.rpm
libpng-debuginfo-1.2.46-1.el6_1.x86_64.rpm
libpng-devel-1.2.46-1.el6_1.i686.rpm
libpng-devel-1.2.46-1.el6_1.x86_64.rpm
libpng-static-1.2.46-1.el6_1.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/libpng-1.2.46-1.el6_1.src.rpm
i386:
libpng-1.2.46-1.el6_1.i686.rpm
libpng-debuginfo-1.2.46-1.el6_1.i686.rpm
libpng-devel-1.2.46-1.el6_1.i686.rpm
ppc64:
libpng-1.2.46-1.el6_1.ppc.rpm
libpng-1.2.46-1.el6_1.ppc64.rpm
libpng-debuginfo-1.2.46-1.el6_1.ppc.rpm
libpng-debuginfo-1.2.46-1.el6_1.ppc64.rpm
libpng-devel-1.2.46-1.el6_1.ppc.rpm
libpng-devel-1.2.46-1.el6_1.ppc64.rpm
s390x:
libpng-1.2.46-1.el6_1.s390.rpm
libpng-1.2.46-1.el6_1.s390x.rpm
libpng-debuginfo-1.2.46-1.el6_1.s390.rpm
libpng-debuginfo-1.2.46-1.el6_1.s390x.rpm
libpng-devel-1.2.46-1.el6_1.s390.rpm
libpng-devel-1.2.46-1.el6_1.s390x.rpm
x86_64:
libpng-1.2.46-1.el6_1.i686.rpm
libpng-1.2.46-1.el6_1.x86_64.rpm
libpng-debuginfo-1.2.46-1.el6_1.i686.rpm
libpng-debuginfo-1.2.46-1.el6_1.x86_64.rpm
libpng-devel-1.2.46-1.el6_1.i686.rpm
libpng-devel-1.2.46-1.el6_1.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/libpng-1.2.46-1.el6_1.src.rpm
i386:
libpng-debuginfo-1.2.46-1.el6_1.i686.rpm
libpng-static-1.2.46-1.el6_1.i686.rpm
ppc64:
libpng-debuginfo-1.2.46-1.el6_1.ppc64.rpm
libpng-static-1.2.46-1.el6_1.ppc64.rpm
s390x:
libpng-debuginfo-1.2.46-1.el6_1.s390x.rpm
libpng-static-1.2.46-1.el6_1.s390x.rpm
x86_64:
libpng-debuginfo-1.2.46-1.el6_1.x86_64.rpm
libpng-static-1.2.46-1.el6_1.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/libpng-1.2.46-1.el6_1.src.rpm
i386:
libpng-1.2.46-1.el6_1.i686.rpm
libpng-debuginfo-1.2.46-1.el6_1.i686.rpm
libpng-devel-1.2.46-1.el6_1.i686.rpm
x86_64:
libpng-1.2.46-1.el6_1.i686.rpm
libpng-1.2.46-1.el6_1.x86_64.rpm
libpng-debuginfo-1.2.46-1.el6_1.i686.rpm
libpng-debuginfo-1.2.46-1.el6_1.x86_64.rpm
libpng-devel-1.2.46-1.el6_1.i686.rpm
libpng-devel-1.2.46-1.el6_1.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/libpng-1.2.46-1.el6_1.src.rpm
i386:
libpng-debuginfo-1.2.46-1.el6_1.i686.rpm
libpng-static-1.2.46-1.el6_1.i686.rpm
x86_64:
libpng-debuginfo-1.2.46-1.el6_1.x86_64.rpm
libpng-static-1.2.46-1.el6_1.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package
7. References:
https://www.redhat.com/security/data/cve/CVE-2011-2501.html
https://www.redhat.com/security/data/cve/CVE-2011-2690.html
https://www.redhat.com/security/data/cve/CVE-2011-2692.html
https://access.redhat.com/security/updates/classification/#moderate
8. Contact:
The Red Hat security contact is <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2011 Red Hat, Inc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.4 (GNU/Linux)
iD8DBQFOManQXlSAg2UNWIIRAuaqAJ0Sn+1OeUAX7QhB2Kk/SKNByAhTugCgofrB
950xRIwxHo1aClHvqeU93+Y=
=APX+
-----END PGP SIGNATURE-----
--
RHSA-announce mailing list
Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.
https://www.redhat.com/mailman/listinfo/rhsa-announce
Posljednje sigurnosne preporuke