rhsa-2012_0017
Vulnerability from csaf_redhat
Published
2012-01-11 17:43
Modified
2024-11-22 06:04
Summary
Red Hat Security Advisory: libxml2 security update

Notes

Topic
Updated libxml2 packages that fix several security issues are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.
Details
The libxml2 library is a development toolbox providing the implementation of various XML standards. One of those standards is the XML Path Language (XPath), which is a language for addressing parts of an XML document. A heap-based buffer overflow flaw was found in the way libxml2 decoded entity references with long names. A remote attacker could provide a specially-crafted XML file that, when opened in an application linked against libxml2, would cause the application to crash or, potentially, execute arbitrary code with the privileges of the user running the application. (CVE-2011-3919) An off-by-one error, leading to a heap-based buffer overflow, was found in the way libxml2 parsed certain XML files. A remote attacker could provide a specially-crafted XML file that, when opened in an application linked against libxml2, would cause the application to crash or, potentially, execute arbitrary code with the privileges of the user running the application. (CVE-2011-0216) An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way libxml2 parsed certain XPath expressions. If an attacker were able to supply a specially-crafted XML file to an application using libxml2, as well as an XPath expression for that application to run against the crafted file, it could cause the application to crash or, possibly, execute arbitrary code. (CVE-2011-1944) Flaws were found in the way libxml2 parsed certain XPath expressions. If an attacker were able to supply a specially-crafted XML file to an application using libxml2, as well as an XPath expression for that application to run against the crafted file, it could cause the application to crash. (CVE-2010-4008, CVE-2011-2834) An out-of-bounds memory read flaw was found in libxml2. A remote attacker could provide a specially-crafted XML file that, when opened in an application linked against libxml2, would cause the application to crash. (CVE-2011-3905) Note: Red Hat does not ship any applications that use libxml2 in a way that would allow the CVE-2011-1944, CVE-2010-4008, and CVE-2011-2834 flaws to be exploited; however, third-party applications may allow XPath expressions to be passed which could trigger these flaws. Red Hat would like to thank the Google Security Team for reporting the CVE-2010-4008 issue. Upstream acknowledges Bui Quang Minh from Bkis as the original reporter of CVE-2010-4008. All users of libxml2 are advised to upgrade to these updated packages, which contain backported patches to correct these issues. The desktop must be restarted (log out, then log back in) for this update to take effect.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.



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            text: "Updated libxml2 packages that fix several security issues are now available\nfor Red Hat Enterprise Linux 5.\n\nThe Red Hat Security Response Team has rated this update as having\nimportant security impact. Common Vulnerability Scoring System (CVSS) base\nscores, which give detailed severity ratings, are available for each\nvulnerability from the CVE links in the References section.",
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            text: "The libxml2 library is a development toolbox providing the implementation\nof various XML standards. One of those standards is the XML Path Language\n(XPath), which is a language for addressing parts of an XML document.\n\nA heap-based buffer overflow flaw was found in the way libxml2 decoded\nentity references with long names. A remote attacker could provide a\nspecially-crafted XML file that, when opened in an application linked\nagainst libxml2, would cause the application to crash or, potentially,\nexecute arbitrary code with the privileges of the user running the\napplication. (CVE-2011-3919)\n\nAn off-by-one error, leading to a heap-based buffer overflow, was found in\nthe way libxml2 parsed certain XML files. A remote attacker could provide a\nspecially-crafted XML file that, when opened in an application linked\nagainst libxml2, would cause the application to crash or, potentially,\nexecute arbitrary code with the privileges of the user running the\napplication. (CVE-2011-0216)\n\nAn integer overflow flaw, leading to a heap-based buffer overflow, was\nfound in the way libxml2 parsed certain XPath expressions. If an attacker\nwere able to supply a specially-crafted XML file to an application using\nlibxml2, as well as an XPath expression for that application to run against\nthe crafted file, it could cause the application to crash or, possibly,\nexecute arbitrary code. (CVE-2011-1944)\n\nFlaws were found in the way libxml2 parsed certain XPath expressions. If an\nattacker were able to supply a specially-crafted XML file to an application\nusing libxml2, as well as an XPath expression for that application to run\nagainst the crafted file, it could cause the application to crash.\n(CVE-2010-4008, CVE-2011-2834)\n\nAn out-of-bounds memory read flaw was found in libxml2. A remote attacker\ncould provide a specially-crafted XML file that, when opened in an\napplication linked against libxml2, would cause the application to crash.\n(CVE-2011-3905)\n\nNote: Red Hat does not ship any applications that use libxml2 in a way that\nwould allow the CVE-2011-1944, CVE-2010-4008, and CVE-2011-2834 flaws to be\nexploited; however, third-party applications may allow XPath expressions to\nbe passed which could trigger these flaws.\n\nRed Hat would like to thank the Google Security Team for reporting the\nCVE-2010-4008 issue. Upstream acknowledges Bui Quang Minh from Bkis as the\noriginal reporter of CVE-2010-4008.\n\nAll users of libxml2 are advised to upgrade to these updated packages,\nwhich contain backported patches to correct these issues. The desktop must\nbe restarted (log out, then log back in) for this update to take effect.",
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         acknowledgments: [
            {
               names: [
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               ],
            },
            {
               names: [
                  "Bui Quang Minh",
               ],
               organization: "Bkis",
               summary: "Acknowledged by upstream.",
            },
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         cve: "CVE-2010-4008",
         cwe: {
            id: "CWE-476",
            name: "NULL Pointer Dereference",
         },
         discovery_date: "2010-10-18T00:00:00+00:00",
         ids: [
            {
               system_name: "Red Hat Bugzilla ID",
               text: "645341",
            },
         ],
         notes: [
            {
               category: "description",
               text: "libxml2 before 2.7.8, as used in Google Chrome before 7.0.517.44, Apple Safari 5.0.2 and earlier, and other products, reads from invalid memory locations during processing of malformed XPath expressions, which allows context-dependent attackers to cause a denial of service (application crash) via a crafted XML document.",
               title: "Vulnerability description",
            },
            {
               category: "summary",
               text: "libxml2: Crash (stack frame overflow or NULL pointer dereference) by traversal of XPath axis",
               title: "Vulnerability summary",
            },
            {
               category: "other",
               text: "This issue did not affect the versions of libxml and libxml2 as shipped with Red Hat Enterprise Linux 3, and it did not affect the version of libxml2 as shipped with Red Hat Enterprise Linux 4.",
               title: "Statement",
            },
            {
               category: "general",
               text: "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
               title: "CVSS score applicability",
            },
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               category: "description",
               text: "Off-by-one error in libxml in Apple Safari before 5.0.6 allows remote attackers to execute arbitrary code or cause a denial of service (heap-based buffer overflow and application crash) via a crafted web site.",
               title: "Vulnerability description",
            },
            {
               category: "summary",
               text: "libxml2: Off-by-one error leading to heap-based buffer overflow in encoding",
               title: "Vulnerability summary",
            },
            {
               category: "general",
               text: "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
               title: "CVSS score applicability",
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               category: "self",
               summary: "Canonical URL",
               url: "https://access.redhat.com/security/cve/CVE-2011-0216",
            },
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               category: "external",
               summary: "RHBZ#724906",
               url: "https://bugzilla.redhat.com/show_bug.cgi?id=724906",
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               summary: "https://www.cve.org/CVERecord?id=CVE-2011-0216",
               url: "https://www.cve.org/CVERecord?id=CVE-2011-0216",
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            {
               category: "external",
               summary: "https://nvd.nist.gov/vuln/detail/CVE-2011-0216",
               url: "https://nvd.nist.gov/vuln/detail/CVE-2011-0216",
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         release_date: "2011-07-20T00:00:00+00:00",
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               category: "vendor_fix",
               date: "2012-01-11T17:43:00+00:00",
               details: "Before applying this update, make sure all previously-released errata\nrelevant to your system have been applied.\n\nThis update is available via the Red Hat Network. Details on how to\nuse the Red Hat Network to apply this update are available at\nhttps://access.redhat.com/kb/docs/DOC-11259",
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               category: "description",
               text: "Integer overflow in xpath.c in libxml2 2.6.x through 2.6.32 and 2.7.x through 2.7.8, and libxml 1.8.16 and earlier, allows context-dependent attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted XML file that triggers a heap-based buffer overflow when adding a new namespace node, related to handling of XPath expressions.",
               title: "Vulnerability description",
            },
            {
               category: "summary",
               text: "libxml2: Heap-based buffer overflow by adding new namespace node to an existing nodeset or merging nodesets",
               title: "Vulnerability summary",
            },
            {
               category: "general",
               text: "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
               title: "CVSS score applicability",
            },
         ],
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               category: "impact",
               details: "Low",
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         title: "libxml2: Heap-based buffer overflow by adding new namespace node to an existing nodeset or merging nodesets",
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      {
         cve: "CVE-2011-2834",
         discovery_date: "2011-09-05T00:00:00+00:00",
         ids: [
            {
               system_name: "Red Hat Bugzilla ID",
               text: "735751",
            },
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         notes: [
            {
               category: "description",
               text: "Double free vulnerability in libxml2, as used in Google Chrome before 14.0.835.163, allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors related to XPath handling.",
               title: "Vulnerability description",
            },
            {
               category: "summary",
               text: "libxml2: double-free caused by malformed XPath expression in XSLT",
               title: "Vulnerability summary",
            },
            {
               category: "general",
               text: "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
               title: "CVSS score applicability",
            },
         ],
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         ids: [
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               text: "libxml2, as used in Google Chrome before 16.0.912.63, allows remote attackers to cause a denial of service (out-of-bounds read) via unspecified vectors.",
               title: "Vulnerability description",
            },
            {
               category: "summary",
               text: "libxml2 out of bounds read",
               title: "Vulnerability summary",
            },
            {
               category: "other",
               text: "This issue affects the version of libxml2 as shipped with Red Hat Enterprise\nLinux 4, 5 and 6 and has been addressed via RHSA-2012:0016, RHSA-2012:0017 and\nRHSA-2012:0018 respectively. This issue affects the version of mingw32-libxml2\nas shipped with Red Hat Enterprise Linux 6. The Red Hat Security Response Team\nhas rated this issue as having low security impact. A future update may address\nthis issue in Red Hat Enterprise Linux 6.",
               title: "Statement",
            },
            {
               category: "general",
               text: "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
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         references: [
            {
               category: "self",
               summary: "Canonical URL",
               url: "https://access.redhat.com/security/cve/CVE-2011-3905",
            },
            {
               category: "external",
               summary: "RHBZ#767387",
               url: "https://bugzilla.redhat.com/show_bug.cgi?id=767387",
            },
            {
               category: "external",
               summary: "https://www.cve.org/CVERecord?id=CVE-2011-3905",
               url: "https://www.cve.org/CVERecord?id=CVE-2011-3905",
            },
            {
               category: "external",
               summary: "https://nvd.nist.gov/vuln/detail/CVE-2011-3905",
               url: "https://nvd.nist.gov/vuln/detail/CVE-2011-3905",
            },
         ],
         release_date: "2011-12-13T00:00:00+00:00",
         remediations: [
            {
               category: "vendor_fix",
               date: "2012-01-11T17:43:00+00:00",
               details: "Before applying this update, make sure all previously-released errata\nrelevant to your system have been applied.\n\nThis update is available via the Red Hat Network. Details on how to\nuse the Red Hat Network to apply this update are available at\nhttps://access.redhat.com/kb/docs/DOC-11259",
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               category: "impact",
               details: "Low",
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         title: "libxml2 out of bounds read",
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      {
         cve: "CVE-2011-3919",
         cwe: {
            id: "CWE-122",
            name: "Heap-based Buffer Overflow",
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         discovery_date: "2012-01-05T00:00:00+00:00",
         ids: [
            {
               system_name: "Red Hat Bugzilla ID",
               text: "771896",
            },
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         notes: [
            {
               category: "description",
               text: "Heap-based buffer overflow in libxml2, as used in Google Chrome before 16.0.912.75, allows remote attackers to cause a denial of service or possibly have unspecified other impact via unknown vectors.",
               title: "Vulnerability description",
            },
            {
               category: "summary",
               text: "libxml2: Heap-based buffer overflow when decoding an entity reference with a long name",
               title: "Vulnerability summary",
            },
            {
               category: "other",
               text: "This issue affected the versions of libxml2 as shipped with Red Hat Enterprise Linux 4, 5 and 6 and has been addressed via RHSA-2012:0016, RHSA-2012:0017 and RHSA-2012:0018 respectively.",
               title: "Statement",
            },
            {
               category: "general",
               text: "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
               title: "CVSS score applicability",
            },
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                  accessVector: "NETWORK",
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                  baseScore: 6.8,
                  confidentialityImpact: "PARTIAL",
                  integrityImpact: "PARTIAL",
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         threats: [
            {
               category: "impact",
               details: "Important",
            },
         ],
         title: "libxml2: Heap-based buffer overflow when decoding an entity reference with a long name",
      },
   ],
}


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