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Gentoo Linux Security Advisory GLSA 200407-06 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: libpng: Buffer overflow on row buffers |
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Date: July 08, 2004 |
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Bugs: #56307 |
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ID: 200407-06 |
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Synopsis |
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======== |
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|
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libpng contains a buffer overflow vulnerability potentially allowing an |
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attacker to perform a Denial of Service attack or even execute |
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arbitrary code. |
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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 other 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 <= 1.2.5-r6 >= 1.2.5-r7 |
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|
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Description |
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=========== |
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|
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Due to a wrong calculation of loop offset values, libpng contains a |
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buffer overflow vulnerability on the row buffers. This vulnerability |
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was initially patched in January 2003 but since it has been discovered |
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that libpng contains the same vulnerability in two other places. |
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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 this vulnerability to cause programs linked |
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against the library to crash or execute arbitrary code with the |
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permissions of the user running the vulnerable program, which could be |
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the root user. |
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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. All users are encouraged to |
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upgrade to the latest available version. |
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|
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Resolution |
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========== |
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|
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All libpng users should upgrade to the latest stable version: |
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# emerge sync |
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# emerge -pv ">=media-libs/libpng-1.2.5-r7" |
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# emerge ">=media-libs/libpng-1.2.5-r7" |
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|
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You should also run revdep-rebuild to rebuild any packages that depend |
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on older versions of libpng : |
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# revdep-rebuild |
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|
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References |
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========== |
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|
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[ 1 ] CAN-2002-1363 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1363 |
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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-200407-06.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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http://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 2004 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/1.0 |
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