RHSA-2012:0017

Vulnerability from csaf_redhat - Published: 2012-01-11 17:43 - Updated: 2026-01-28 22:51
Summary
Red Hat Security Advisory: libxml2 security update
Severity
Important
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.
CVE-2010-4008

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.

4.3 ()
AV:N/AC:M/Au:N/C:N/I:N/A:P
CWE-476 - NULL Pointer Dereference
Vendor Fix Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259 https://access.redhat.com/errata/RHSA-2012:0017
CVE-2011-0216

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.

5.1 ()
AV:N/AC:H/Au:N/C:P/I:P/A:P
CWE-122 - Heap-based Buffer Overflow
Vendor Fix Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259 https://access.redhat.com/errata/RHSA-2012:0017
CVE-2011-1944

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.

5.1 ()
AV:N/AC:H/Au:N/C:P/I:P/A:P
CWE-122 - Heap-based Buffer Overflow
Vendor Fix Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259 https://access.redhat.com/errata/RHSA-2012:0017
CVE-2011-2834

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.

4.3 ()
AV:N/AC:M/Au:N/C:N/I:N/A:P
Vendor Fix Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259 https://access.redhat.com/errata/RHSA-2012:0017
CVE-2011-3905

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.

4.3 ()
AV:N/AC:M/Au:N/C:N/I:N/A:P
CWE-125 - Out-of-bounds Read
Vendor Fix Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259 https://access.redhat.com/errata/RHSA-2012:0017
CVE-2011-3919

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.

6.8 ()
AV:N/AC:M/Au:N/C:P/I:P/A:P
CWE-122 - Heap-based Buffer Overflow
Vendor Fix Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259 https://access.redhat.com/errata/RHSA-2012:0017
References
https://access.redhat.com/errata/RHSA-2012:0017 self
https://access.redhat.com/security/updates/classi… external
https://bugzilla.redhat.com/show_bug.cgi?id=645341 external
https://bugzilla.redhat.com/show_bug.cgi?id=709747 external
https://bugzilla.redhat.com/show_bug.cgi?id=724906 external
https://bugzilla.redhat.com/show_bug.cgi?id=735751 external
https://bugzilla.redhat.com/show_bug.cgi?id=767387 external
https://bugzilla.redhat.com/show_bug.cgi?id=771896 external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2010-4008 self
https://bugzilla.redhat.com/show_bug.cgi?id=645341 external
https://www.cve.org/CVERecord?id=CVE-2010-4008 external
https://nvd.nist.gov/vuln/detail/CVE-2010-4008 external
https://access.redhat.com/security/cve/CVE-2011-0216 self
https://bugzilla.redhat.com/show_bug.cgi?id=724906 external
https://www.cve.org/CVERecord?id=CVE-2011-0216 external
https://nvd.nist.gov/vuln/detail/CVE-2011-0216 external
https://access.redhat.com/security/cve/CVE-2011-1944 self
https://bugzilla.redhat.com/show_bug.cgi?id=709747 external
https://www.cve.org/CVERecord?id=CVE-2011-1944 external
https://nvd.nist.gov/vuln/detail/CVE-2011-1944 external
https://access.redhat.com/security/cve/CVE-2011-2834 self
https://bugzilla.redhat.com/show_bug.cgi?id=735751 external
https://www.cve.org/CVERecord?id=CVE-2011-2834 external
https://nvd.nist.gov/vuln/detail/CVE-2011-2834 external
https://access.redhat.com/security/cve/CVE-2011-3905 self
https://bugzilla.redhat.com/show_bug.cgi?id=767387 external
https://www.cve.org/CVERecord?id=CVE-2011-3905 external
https://nvd.nist.gov/vuln/detail/CVE-2011-3905 external
https://access.redhat.com/security/cve/CVE-2011-3919 self
https://bugzilla.redhat.com/show_bug.cgi?id=771896 external
https://www.cve.org/CVERecord?id=CVE-2011-3919 external
https://nvd.nist.gov/vuln/detail/CVE-2011-3919 external
Acknowledgments
Google Security Team
Bkis Bui Quang Minh
To clipboard 

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          "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"
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          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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      "ids": [
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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\u0027s 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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        {
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          "summary": "RHBZ#724906",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=724906"
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          "category": "external",
          "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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      "cve": "CVE-2011-1944",
      "cwe": {
        "id": "CWE-122",
        "name": "Heap-based Buffer Overflow"
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      "ids": [
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          "text": "709747"
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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\u0027s 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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          "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\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2011-2834"
        },
        {
          "category": "external",
          "summary": "RHBZ#735751",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=735751"
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        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2011-2834",
          "url": "https://www.cve.org/CVERecord?id=CVE-2011-2834"
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        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2011-2834",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2011-2834"
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      "release_date": "2011-10-11T00:00:00+00:00",
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          "details": "Low"
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      "title": "libxml2: double-free caused by malformed XPath expression in XSLT"
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      "cve": "CVE-2011-3905",
      "cwe": {
        "id": "CWE-125",
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      "ids": [
        {
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          "text": "767387"
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      "notes": [
        {
          "category": "description",
          "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\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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          "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"
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          "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\u0027s 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-2011-3919"
        },
        {
          "category": "external",
          "summary": "RHBZ#771896",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=771896"
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          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2011-3919",
          "url": "https://www.cve.org/CVERecord?id=CVE-2011-3919"
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        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2011-3919",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2011-3919"
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      "release_date": "2012-01-06T00:00:00+00:00",
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          "date": "2012-01-11T17:43:00+00:00",
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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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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.