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Gentoo Linux Security Advisory GLSA 200804-15 |
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http://security.gentoo.org/ |
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Severity: High |
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Title: libpng: Execution of arbitrary code |
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Date: April 15, 2008 |
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Bugs: #217047 |
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ID: 200804-15 |
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Synopsis |
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======== |
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|
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A vulnerability in libpng may allow for execution of arbitrary code in |
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certain applications that handle untrusted images. |
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|
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Background |
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========== |
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|
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libpng is a free ANSI C library used to process and manipulate PNG |
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images. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 media-libs/libpng < 1.2.26-r1 >= 1.2.26-r1 |
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|
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Description |
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=========== |
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|
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Tavis Ormandy of the Google Security Team discovered that libpng does |
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not handle zero-length unknown chunks in PNG files correctly, which |
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might lead to memory corruption in applications that call |
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png_set_read_user_chunk_fn() or png_set_keep_unknown_chunks(). |
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|
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Impact |
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====== |
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|
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A remote attacker could entice a user or automated system to process a |
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specially crafted PNG image in an application using libpng and possibly |
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execute arbitrary code with the privileges of the user running the |
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application. Note that processing of unknown chunks is disabled by |
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default in most PNG applications, but some such as ImageMagick are |
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affected. |
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|
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Workaround |
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========== |
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There is no known workaround at this time. |
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Resolution |
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========== |
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All libpng users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=media-libs/libpng-1.2.26-r1" |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2008-1382 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1382 |
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|
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Availability |
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============ |
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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http://security.gentoo.org/glsa/glsa-200804-15.xml |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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License |
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======= |
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Copyright 2008 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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|
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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http://creativecommons.org/licenses/by-sa/2.5 |
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