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Fedora EPEL Update Notification
FEDORA-EPEL-2011-3664
2011-06-29 18:00:06
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Name : libpng10
Product : Fedora EPEL 6
Version : 1.0.55
Release : 1.el6
URL :
http://www.libpng.org/pub/png/libpng.html
Summary : Old version of libpng, needed to run old binaries
Description :
The libpng10 package contains an old version of libpng, a library of functions
for creating and manipulating PNG (Portable Network Graphics) image format
files.
This package is needed if you want to run binaries that were linked dynamically
with libpng 1.0.x.
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Update Information:
This update fixes a 1-byte uninitialized memory reference in png_format_buffer(). It
allows attackers to cause a denial of service (crash) via a malformed PNG image file that
triggers an error that causes an out-of-bounds read when creating the error message. This
is CVE-2011-2501.
Also fixed in this release are some other minor security problems and there's
additionally a bugfix backported from 1.5.3: when expanding a paletted image, always
expand to RGBA if transparency is present.
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References:
[ 1 ] Bug #717084 - CVE-2011-2501 libpng: regression of CVE-2004-0421 in 1.2.23+
https://bugzilla.redhat.com/show_bug.cgi?id=717084
[ 2 ] Bug #720607 - CVE-2011-2690 libpng: buffer overwrite in png_rgb_to_gray
https://bugzilla.redhat.com/show_bug.cgi?id=720607
[ 3 ] Bug #720608 - CVE-2011-2691 libpng: Crash in png_default_error due to use of NULL
Pointer
https://bugzilla.redhat.com/show_bug.cgi?id=720608
[ 4 ] Bug #720612 - CVE-2011-2692 libpng: Memory corruption when handling empty sCAL
chunks
https://bugzilla.redhat.com/show_bug.cgi?id=720612
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This update can be installed with the "yum" update programs. Use
su -c 'yum update libpng10' at the command line.
For more information, refer to "Managing Software with yum",
available at
http://docs.fedoraproject.org/yum/.
All packages are signed with the Fedora EPEL GPG key. More details on the
GPG keys used by the Fedora Project can be found at
https://fedoraproject.org/keys
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