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Gentoo Linux Security Advisory GLSA 201502-10 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: libpng: User-assisted execution of arbitrary code |
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Date: February 15, 2015 |
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Bugs: #531264, #533358 |
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ID: 201502-10 |
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Synopsis |
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======== |
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|
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Two vulnerabilities have been found in libpng, possibly resulting in |
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execution of arbitrary code. |
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Background |
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========== |
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|
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libpng is a standard library used to process PNG (Portable Network |
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Graphics) images. It is used by several programs, including web |
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browsers and potentially server processes. |
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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 < 1.6.16 >= 1.6.16 |
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*>= 1.5.21 |
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*>= 1.2.52 |
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|
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Description |
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=========== |
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|
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Two vulnerabilities have been discovered in libpng: |
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|
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* The png_user_version_check function contains an out-of-bounds memory |
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access error (libpng 1.6.15 Release Notes) |
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* The png_combine_row function contains an integer overflow error, |
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which could result in a heap-based buffer overflow (CVE-2014-9495) |
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|
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Impact |
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====== |
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|
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A context-dependent attacker could entice a user to open a specially |
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crafted PNG file using an application linked against libpng, possibly |
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resulting in execution of arbitrary code. |
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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 1.6 users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=media-libs/libpng-1.6.16" |
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All libpng 1.5 users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=media-libs/libpng-1.5.21" |
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References |
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========== |
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|
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[ 1 ] CVE-2014-9495 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-9495 |
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[ 2 ] libpng 1.6.15 Release Notes |
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http://www.libpng.org/pub/png/src/libpng-1.6.15-README.txt |
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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-201502-10.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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https://bugs.gentoo.org. |
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License |
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======= |
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Copyright 2015 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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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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