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Gentoo Linux Security Advisory GLSA 201206-15 |
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http://security.gentoo.org/ |
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|
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Severity: Normal |
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Title: libpng: Multiple vulnerabilities |
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Date: June 22, 2012 |
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Bugs: #373967, #386185, #401987, #404197, #410153 |
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ID: 201206-15 |
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|
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Synopsis |
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======== |
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|
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Multiple vulnerabilities in libpng might allow remote attackers to |
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execute arbitrary code or cause a Denial of Service condition. |
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|
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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 < 1.5.10 >= 1.5.10 |
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*>= 1.2.49 |
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|
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Description |
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=========== |
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|
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Multiple vulnerabilities have been discovered in libpng: |
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|
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* The "embedded_profile_len()" function in pngwutil.c does not check |
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for negative values, resulting in a memory leak (CVE-2009-5063). |
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* The "png_format_buffer()" function in pngerror.c contains an |
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off-by-one error (CVE-2011-2501). |
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* The "png_rgb_to_gray()" function in pngrtran.c contains an integer |
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overflow error (CVE-2011-2690). |
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* The "png_err()" function in pngerror.c contains a NULL pointer |
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dereference error (CVE-2011-2691). |
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* The "png_handle_sCAL()" function in pngrutil.c improperly handles |
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malformed sCAL chunks(CVE-2011-2692). |
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* The "png_decompress_chunk()" function in pngrutil.c contains an |
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integer overflow error (CVE-2011-3026). |
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* The "png_inflate()" function in pngrutil.c contains and out of bounds |
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error (CVE-2011-3045). |
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* The "png_set_text_2()" function in pngset.c contains an error which |
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could result in memory corruption (CVE-2011-3048). |
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* The "png_formatted_warning()" function in pngerror.c contains an |
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off-by-one error (CVE-2011-3464). |
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|
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Impact |
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====== |
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|
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An attacker could exploit these vulnerabilities to execute arbitrary |
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code with the permissions of the user running the vulnerable program, |
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which could be the root user, or to cause programs linked against the |
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library to crash. |
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|
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Workaround |
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========== |
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|
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There is no known workaround at this time. |
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|
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Resolution |
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========== |
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|
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All libpng 1.5 users should upgrade to the latest version: |
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|
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=media-libs/libpng-1.5.10" |
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|
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All libpng 1.2 users should upgrade to the latest version: |
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|
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=media-libs/libpng-1.2.49" |
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|
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Packages which depend on this library may need to be recompiled. Tools |
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such as revdep-rebuild may assist in identifying some of these |
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packages. |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2009-5063 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-5063 |
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[ 2 ] CVE-2011-2501 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2501 |
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[ 3 ] CVE-2011-2690 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2690 |
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[ 4 ] CVE-2011-2691 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2691 |
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[ 5 ] CVE-2011-2692 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2692 |
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[ 6 ] CVE-2011-3026 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-3026 |
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[ 7 ] CVE-2011-3045 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-3045 |
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[ 8 ] CVE-2011-3048 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-3048 |
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[ 9 ] CVE-2011-3464 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-3464 |
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|
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Availability |
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============ |
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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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|
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http://security.gentoo.org/glsa/glsa-201206-15.xml |
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|
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Concerns? |
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========= |
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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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|
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License |
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======= |
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|
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Copyright 2012 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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|
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http://creativecommons.org/licenses/by-sa/2.5 |