rhsa-2011_0028
Vulnerability from csaf_redhat
Published
2011-01-13 10:59
Modified
2024-11-22 03:57
Summary
Red Hat Security Advisory: kvm security and bug fix update

Notes

Topic
Updated kvm packages that fix one security issue and several bugs are 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
KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built for the standard Red Hat Enterprise Linux kernel. A data structure field in kvm_vcpu_ioctl_x86_get_vcpu_events() in QEMU-KVM was not initialized properly before being copied to user-space. A privileged host user with access to "/dev/kvm" could use this flaw to leak kernel stack memory to user-space. (CVE-2010-4525) Red Hat would like to thank Stephan Mueller of atsec information security for reporting this issue. These updated packages also fix several bugs. Documentation for these bug fixes will be available shortly in the "kvm" section of the Red Hat Enterprise Linux 5.6 Technical Notes, linked to in the References. All KVM users should upgrade to these updated packages, which resolve this issue as well as fixing the bugs noted in the Technical Notes. Note: The procedure in the Solution section must be performed before this update will 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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        "full_product_name": {
          "name": "kvm-debuginfo-0:83-224.el5.x86_64 as a component of Red Hat Enterprise Linux Virtualization (v. 5 server)",
          "product_id": "5Server-VT:kvm-debuginfo-0:83-224.el5.x86_64"
        },
        "product_reference": "kvm-debuginfo-0:83-224.el5.x86_64",
        "relates_to_product_reference": "5Server-VT"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "kvm-qemu-img-0:83-224.el5.x86_64 as a component of Red Hat Enterprise Linux Virtualization (v. 5 server)",
          "product_id": "5Server-VT:kvm-qemu-img-0:83-224.el5.x86_64"
        },
        "product_reference": "kvm-qemu-img-0:83-224.el5.x86_64",
        "relates_to_product_reference": "5Server-VT"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "kvm-tools-0:83-224.el5.x86_64 as a component of Red Hat Enterprise Linux Virtualization (v. 5 server)",
          "product_id": "5Server-VT:kvm-tools-0:83-224.el5.x86_64"
        },
        "product_reference": "kvm-tools-0:83-224.el5.x86_64",
        "relates_to_product_reference": "5Server-VT"
      }
    ]
  },
  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Stephan Mueller"
          ],
          "organization": "atsec information security"
        }
      ],
      "cve": "CVE-2010-4525",
      "discovery_date": "2010-12-24T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "665470"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "Linux kernel 2.6.33 and 2.6.34.y does not initialize the kvm_vcpu_events-\u003einterrupt.pad structure member, which allows local users to obtain potentially sensitive information from kernel stack memory via unspecified vectors.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kvm: x86: zero kvm_vcpu_events-\u003einterrupt.pad infoleak",
          "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"
        }
      ],
      "product_status": {
        "fixed": [
          "5Client-VT:kmod-kvm-0:83-224.el5.x86_64",
          "5Client-VT:kmod-kvm-debug-0:83-224.el5.x86_64",
          "5Client-VT:kvm-0:83-224.el5.src",
          "5Client-VT:kvm-0:83-224.el5.x86_64",
          "5Client-VT:kvm-debuginfo-0:83-224.el5.x86_64",
          "5Client-VT:kvm-qemu-img-0:83-224.el5.x86_64",
          "5Client-VT:kvm-tools-0:83-224.el5.x86_64",
          "5Server-VT:kmod-kvm-0:83-224.el5.x86_64",
          "5Server-VT:kmod-kvm-debug-0:83-224.el5.x86_64",
          "5Server-VT:kvm-0:83-224.el5.src",
          "5Server-VT:kvm-0:83-224.el5.x86_64",
          "5Server-VT:kvm-debuginfo-0:83-224.el5.x86_64",
          "5Server-VT:kvm-qemu-img-0:83-224.el5.x86_64",
          "5Server-VT:kvm-tools-0:83-224.el5.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2010-4525"
        },
        {
          "category": "external",
          "summary": "RHBZ#665470",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=665470"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2010-4525",
          "url": "https://www.cve.org/CVERecord?id=CVE-2010-4525"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2010-4525",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2010-4525"
        }
      ],
      "release_date": "2011-01-05T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2011-01-13T10:59:00+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\nhttp://kbase.redhat.com/faq/docs/DOC-11259\n\nThe following procedure must be performed before this update will take\neffect:\n\n1) Stop all KVM guest virtual machines.\n\n2) Either reboot the hypervisor machine or, as the root user, remove (using\n\"modprobe -r [module]\") and reload (using \"modprobe [module]\") all of the\nfollowing modules which are currently running (determined using \"lsmod\"):\nkvm, ksm, kvm-intel or kvm-amd.\n\n3) Restart the KVM guest virtual machines.",
          "product_ids": [
            "5Client-VT:kmod-kvm-0:83-224.el5.x86_64",
            "5Client-VT:kmod-kvm-debug-0:83-224.el5.x86_64",
            "5Client-VT:kvm-0:83-224.el5.src",
            "5Client-VT:kvm-0:83-224.el5.x86_64",
            "5Client-VT:kvm-debuginfo-0:83-224.el5.x86_64",
            "5Client-VT:kvm-qemu-img-0:83-224.el5.x86_64",
            "5Client-VT:kvm-tools-0:83-224.el5.x86_64",
            "5Server-VT:kmod-kvm-0:83-224.el5.x86_64",
            "5Server-VT:kmod-kvm-debug-0:83-224.el5.x86_64",
            "5Server-VT:kvm-0:83-224.el5.src",
            "5Server-VT:kvm-0:83-224.el5.x86_64",
            "5Server-VT:kvm-debuginfo-0:83-224.el5.x86_64",
            "5Server-VT:kvm-qemu-img-0:83-224.el5.x86_64",
            "5Server-VT:kvm-tools-0:83-224.el5.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2011:0028"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 1.9,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "NONE",
            "vectorString": "AV:L/AC:M/Au:N/C:P/I:N/A:N",
            "version": "2.0"
          },
          "products": [
            "5Client-VT:kmod-kvm-0:83-224.el5.x86_64",
            "5Client-VT:kmod-kvm-debug-0:83-224.el5.x86_64",
            "5Client-VT:kvm-0:83-224.el5.src",
            "5Client-VT:kvm-0:83-224.el5.x86_64",
            "5Client-VT:kvm-debuginfo-0:83-224.el5.x86_64",
            "5Client-VT:kvm-qemu-img-0:83-224.el5.x86_64",
            "5Client-VT:kvm-tools-0:83-224.el5.x86_64",
            "5Server-VT:kmod-kvm-0:83-224.el5.x86_64",
            "5Server-VT:kmod-kvm-debug-0:83-224.el5.x86_64",
            "5Server-VT:kvm-0:83-224.el5.src",
            "5Server-VT:kvm-0:83-224.el5.x86_64",
            "5Server-VT:kvm-debuginfo-0:83-224.el5.x86_64",
            "5Server-VT:kvm-qemu-img-0:83-224.el5.x86_64",
            "5Server-VT:kvm-tools-0:83-224.el5.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "kvm: x86: zero kvm_vcpu_events-\u003einterrupt.pad infoleak"
    }
  ]
}


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