rhsa-2013_0807
Vulnerability from csaf_redhat
Published
2013-05-09 18:10
Modified
2024-11-22 06:31
Summary
Red Hat Security Advisory: hypervkvpd security and bug fix update

Notes

Topic
An updated hypervkvpd package that fixes one security issue and one bug is now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having low security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.
Details
The hypervkvpd package contains hypervkvpd, the guest Microsoft Hyper-V Key-Value Pair (KVP) daemon. The daemon passes basic information to the host through VMBus, such as the guest IP address, fully qualified domain name, operating system name, and operating system release number. A denial of service flaw was found in the way hypervkvpd processed certain Netlink messages. A local, unprivileged user in a guest (running on Microsoft Hyper-V) could send a Netlink message that, when processed, would cause the guest's hypervkvpd daemon to exit. (CVE-2012-5532) The CVE-2012-5532 issue was discovered by Florian Weimer of the Red Hat Product Security Team. This update also fixes the following bug: * The hypervkvpd daemon did not close the file descriptors for pool files when they were updated. This could eventually lead to hypervkvpd crashing with a "KVP: Failed to open file, pool: 1" error after consuming all available file descriptors. With this update, the file descriptors are closed, correcting this issue. (BZ#953502) Users of hypervkvpd are advised to upgrade to this updated package, which contains backported patches to correct these issues. After installing the update, it is recommended to reboot all guest machines.
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": "An updated hypervkvpd package that fixes one security issue and one bug is\nnow available for Red Hat Enterprise Linux 5.\n\nThe Red Hat Security Response Team has rated this update as having low\nsecurity impact. A Common Vulnerability Scoring System (CVSS) base score,\nwhich gives a detailed severity rating, is available from the CVE link in\nthe References section.",
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        "text": "The hypervkvpd package contains hypervkvpd, the guest Microsoft Hyper-V\nKey-Value Pair (KVP) daemon. The daemon passes basic information to the\nhost through VMBus, such as the guest IP address, fully qualified domain\nname, operating system name, and operating system release number.\n\nA denial of service flaw was found in the way hypervkvpd processed certain\nNetlink messages. A local, unprivileged user in a guest (running on\nMicrosoft Hyper-V) could send a Netlink message that, when processed, would\ncause the guest\u0027s hypervkvpd daemon to exit. (CVE-2012-5532)\n\nThe CVE-2012-5532 issue was discovered by Florian Weimer of the Red Hat\nProduct Security Team.\n\nThis update also fixes the following bug:\n\n* The hypervkvpd daemon did not close the file descriptors for pool files\nwhen they were updated. This could eventually lead to hypervkvpd crashing\nwith a \"KVP: Failed to open file, pool: 1\" error after consuming all\navailable file descriptors. With this update, the file descriptors are\nclosed, correcting this issue. (BZ#953502)\n\nUsers of hypervkvpd are advised to upgrade to this updated package, which\ncontains backported patches to correct these issues. After installing the\nupdate, it is recommended to reboot all guest machines.",
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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Florian Weimer"
          ],
          "organization": "Red Hat Product Security Team",
          "summary": "This issue was discovered by Red Hat."
        }
      ],
      "cve": "CVE-2012-5532",
      "discovery_date": "2012-11-02T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "877572"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "The main function in tools/hv/hv_kvp_daemon.c in hypervkvpd, as distributed in the Linux kernel before 3.8-rc1, allows local users to cause a denial of service (daemon exit) via a crafted application that sends a Netlink message.  NOTE: this vulnerability exists because of an incorrect fix for CVE-2012-2669.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "hypervkvpd: Netlink source address validation allows denial of service",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "The Red Hat Security Response Team has rated this issue as having low security impact. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.",
          "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"
        }
      ],
      "product_status": {
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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2012-5532"
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          "summary": "RHBZ#877572",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=877572"
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          "summary": "https://www.cve.org/CVERecord?id=CVE-2012-5532",
          "url": "https://www.cve.org/CVERecord?id=CVE-2012-5532"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2012-5532",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2012-5532"
        }
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      "release_date": "2012-06-06T00:00:00+00:00",
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            "5Server-5.9.Z:hypervkvpd-debuginfo-0:0-0.7.el5_9.3.ia64",
            "5Server-5.9.Z:hypervkvpd-debuginfo-0:0-0.7.el5_9.3.x86_64",
            "5Server-VT-5.9.Z:hypervkvpd-0:0-0.7.el5_9.3.i686",
            "5Server-VT-5.9.Z:hypervkvpd-0:0-0.7.el5_9.3.ia64",
            "5Server-VT-5.9.Z:hypervkvpd-0:0-0.7.el5_9.3.src",
            "5Server-VT-5.9.Z:hypervkvpd-0:0-0.7.el5_9.3.x86_64",
            "5Server-VT-5.9.Z:hypervkvpd-debuginfo-0:0-0.7.el5_9.3.i686",
            "5Server-VT-5.9.Z:hypervkvpd-debuginfo-0:0-0.7.el5_9.3.ia64",
            "5Server-VT-5.9.Z:hypervkvpd-debuginfo-0:0-0.7.el5_9.3.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2013:0807"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 2.1,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P",
            "version": "2.0"
          },
          "products": [
            "5Server-5.9.Z:hypervkvpd-0:0-0.7.el5_9.3.i686",
            "5Server-5.9.Z:hypervkvpd-0:0-0.7.el5_9.3.ia64",
            "5Server-5.9.Z:hypervkvpd-0:0-0.7.el5_9.3.src",
            "5Server-5.9.Z:hypervkvpd-0:0-0.7.el5_9.3.x86_64",
            "5Server-5.9.Z:hypervkvpd-debuginfo-0:0-0.7.el5_9.3.i686",
            "5Server-5.9.Z:hypervkvpd-debuginfo-0:0-0.7.el5_9.3.ia64",
            "5Server-5.9.Z:hypervkvpd-debuginfo-0:0-0.7.el5_9.3.x86_64",
            "5Server-VT-5.9.Z:hypervkvpd-0:0-0.7.el5_9.3.i686",
            "5Server-VT-5.9.Z:hypervkvpd-0:0-0.7.el5_9.3.ia64",
            "5Server-VT-5.9.Z:hypervkvpd-0:0-0.7.el5_9.3.src",
            "5Server-VT-5.9.Z:hypervkvpd-0:0-0.7.el5_9.3.x86_64",
            "5Server-VT-5.9.Z:hypervkvpd-debuginfo-0:0-0.7.el5_9.3.i686",
            "5Server-VT-5.9.Z:hypervkvpd-debuginfo-0:0-0.7.el5_9.3.ia64",
            "5Server-VT-5.9.Z:hypervkvpd-debuginfo-0:0-0.7.el5_9.3.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "hypervkvpd: Netlink source address validation allows denial of service"
    }
  ]
}


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