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Gentoo Linux Security Advisory GLSA 200812-06 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: libxml2: Multiple vulnerabilities |
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Date: December 02, 2008 |
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Bugs: #234099, #237806, #239346, #245960 |
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ID: 200812-06 |
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Synopsis |
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======== |
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|
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Multiple vulnerabilities in libxml2 might lead to execution of |
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arbitrary code or Denial of Service. |
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|
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Background |
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========== |
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|
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libxml2 is the XML (eXtended Markup Language) C parser and toolkit |
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initially developed for the Gnome project. |
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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 dev-libs/libxml2 < 2.7.2-r1 >= 2.7.2-r1 |
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|
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Description |
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=========== |
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|
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Multiple vulnerabilities were reported in libxml2: |
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|
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* Andreas Solberg reported that libxml2 does not properly detect |
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recursion during entity expansion in an attribute value |
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(CVE-2008-3281). |
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|
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* A heap-based buffer overflow has been reported in the |
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xmlParseAttValueComplex() function in parser.c (CVE-2008-3529). |
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|
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* Christian Weiske reported that predefined entity definitions in |
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entities are not properly handled (CVE-2008-4409). |
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|
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* Drew Yao of Apple Product Security reported an integer overflow in |
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the xmlBufferResize() function that can lead to an infinite loop |
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(CVE-2008-4225). |
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|
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* Drew Yao of Apple Product Security reported an integer overflow in |
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the xmlSAX2Characters() function leading to a memory corruption |
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(CVE-2008-4226). |
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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 open a |
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specially crafted XML document with an application using libxml2, |
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possibly resulting in the exeution of arbitrary code or a high CPU and |
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memory consumption. |
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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 libxml2 users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=dev-libs/libxml2-2.7.2-r1" |
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References |
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========== |
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[ 1 ] CVE-2008-3281 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3281 |
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[ 2 ] CVE-2008-3529 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3529 |
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[ 3 ] CVE-2008-4409 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4409 |
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[ 4 ] CVE-2008-4225 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4225 |
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[ 5 ] CVE-2008-4226 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4226 |
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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-200812-06.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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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 |
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