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<?xml version="1.0" encoding="utf-8"?>
<glsa id="200903-12">
<title>OptiPNG: User-assisted execution of arbitrary code</title>
A vulnerability in OptiPNG might result in user-assisted execution of
arbitrary code.
<product type="ebuild">optipng</product>
<announced>March 09, 2009</announced>
<revised>March 09, 2009: 01</revised>
<package name="media-gfx/optipng" auto="yes" arch="*">
<unaffected range="ge">0.6.2-r1</unaffected>
<vulnerable range="lt">0.6.2-r1</vulnerable>
OptiPNG is a PNG optimizer that recompresses image files to a smaller
size, without losing any information.
Roy Tam reported a use-after-free vulnerability in the
GIFReadNextExtension() function in lib/pngxtern/gif/gifread.c leading
to a memory corruption when reading a GIF image.
<impact type="normal">
A remote attacker could entice a user to process a specially crafted
GIF image, possibly resulting in the execution of arbitrary code with
the privileges of the user running the application, or a Denial of
There is no known workaround at this time.
All OptiPNG users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=media-gfx/optipng-0.6.2-r1&quot;</code>
<uri link="">CVE-2009-0749</uri>
<metadata tag="requester" timestamp="Sat, 07 Mar 2009 16:36:48 +0000">
<metadata tag="submitter" timestamp="Sat, 07 Mar 2009 18:09:51 +0000">
<metadata tag="bugReady" timestamp="Sat, 07 Mar 2009 18:10:05 +0000">