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Gentoo Linux Security Advisory GLSA 200711-08 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: libpng: Multiple Denials of Service |
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Date: November 07, 2007 |
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Bugs: #195261 |
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ID: 200711-08 |
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Synopsis |
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======== |
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|
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Several vulnerabilities in libpng may allow a remote attacker to crash |
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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 < 1.2.21-r3 >= 1.2.21-r3 |
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Description |
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=========== |
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|
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An off-by-one error when handling ICC profile chunks in the |
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png_set_iCCP() function was discovered (CVE-2007-5266). George Cook and |
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Jeff Phillips reported several errors in pngrtran.c, the use of logical |
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instead of a bitwise functions and incorrect comparisons |
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(CVE-2007-5268). Tavis Ormandy reported out-of-bounds read errors in |
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several PNG chunk handling functions (CVE-2007-5269). |
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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 craft an image that when processed or viewed by |
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an application using libpng would cause the application to terminate |
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abnormally. |
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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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|
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=media-libs/libpng-1.2.21-r3" |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2007-5266 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5266 |
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[ 2 ] CVE-2007-5268 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5268 |
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[ 3 ] CVE-2007-5269 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5269 |
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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-200711-08.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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|
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License |
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======= |
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Copyright 2007 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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