rhsa-2011_0345
Vulnerability from csaf_redhat
Published
2011-03-10 20:10
Modified
2024-11-05 17:28
Summary
Red Hat Security Advisory: qemu-kvm security update

Notes

Topic
Updated qemu-kvm packages that fix one security issue are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having moderate 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. qemu-kvm is the user-space component for running virtual machines using KVM. Virtual Network Computing (VNC) is a remote display system. A flaw was found in the way the VNC "password" option was handled. Clearing a password disabled VNC authentication, allowing a remote user able to connect to the virtual machines' VNC ports to open a VNC session without authentication. (CVE-2011-0011) All users of qemu-kvm should upgrade to these updated packages, which contain a backported patch to resolve this issue. After installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again 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 qemu-kvm packages that fix one security issue are now available for\nRed Hat Enterprise Linux 6.\n\nThe Red Hat Security Response Team has rated this update as having moderate\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": "KVM (Kernel-based Virtual Machine) is a full virtualization solution for\nLinux on AMD64 and Intel 64 systems. qemu-kvm is the user-space component\nfor running virtual machines using KVM. Virtual Network Computing (VNC) is\na remote display system.\n\nA flaw was found in the way the VNC \"password\" option was handled. Clearing\na password disabled VNC authentication, allowing a remote user able to\nconnect to the virtual machines\u0027 VNC ports to open a VNC session without\nauthentication. (CVE-2011-0011)\n\nAll users of qemu-kvm should upgrade to these updated packages, which\ncontain a backported patch to resolve this issue. After installing this\nupdate, shut down all running virtual machines. Once all virtual machines\nhave shut down, start them again for this update to take effect.",
        "title": "Details"
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  "vulnerabilities": [
    {
      "cve": "CVE-2011-0011",
      "discovery_date": "2011-01-07T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "668589"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "qemu-kvm before 0.11.0 disables VNC authentication when the password is cleared, which allows remote attackers to bypass authentication and establish VNC sessions.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "qemu-kvm: Setting VNC password to empty string silently disables all authentication",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue does not affect versions of kvm package as shipped with Red Hat Enterprise Linux 5.",
          "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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        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2011-0011"
        },
        {
          "category": "external",
          "summary": "RHBZ#668589",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=668589"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2011-0011",
          "url": "https://www.cve.org/CVERecord?id=CVE-2011-0011"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2011-0011",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2011-0011"
        }
      ],
      "release_date": "2011-01-07T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2011-03-10T20:10:00+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",
          "product_ids": [
            "6Client:qemu-img-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6Client:qemu-kvm-2:0.12.1.2-2.113.el6_0.8.src",
            "6Client:qemu-kvm-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6Client:qemu-kvm-debuginfo-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6Client:qemu-kvm-tools-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6ComputeNode:qemu-img-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6ComputeNode:qemu-kvm-2:0.12.1.2-2.113.el6_0.8.src",
            "6ComputeNode:qemu-kvm-2:0.12.1.2-2.113.el6_0.8.x86_64",
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            "6ComputeNode:qemu-kvm-tools-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6Server:qemu-img-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6Server:qemu-kvm-2:0.12.1.2-2.113.el6_0.8.src",
            "6Server:qemu-kvm-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6Server:qemu-kvm-debuginfo-2:0.12.1.2-2.113.el6_0.8.x86_64",
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2011:0345"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "HIGH",
            "accessVector": "ADJACENT_NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 4.3,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:A/AC:H/Au:N/C:P/I:P/A:P",
            "version": "2.0"
          },
          "products": [
            "6Client:qemu-img-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6Client:qemu-kvm-2:0.12.1.2-2.113.el6_0.8.src",
            "6Client:qemu-kvm-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6Client:qemu-kvm-debuginfo-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6Client:qemu-kvm-tools-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6ComputeNode:qemu-img-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6ComputeNode:qemu-kvm-2:0.12.1.2-2.113.el6_0.8.src",
            "6ComputeNode:qemu-kvm-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6ComputeNode:qemu-kvm-debuginfo-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6ComputeNode:qemu-kvm-tools-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6Server:qemu-img-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6Server:qemu-kvm-2:0.12.1.2-2.113.el6_0.8.src",
            "6Server:qemu-kvm-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6Server:qemu-kvm-debuginfo-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6Server:qemu-kvm-tools-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6Workstation:qemu-img-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6Workstation:qemu-kvm-2:0.12.1.2-2.113.el6_0.8.src",
            "6Workstation:qemu-kvm-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6Workstation:qemu-kvm-debuginfo-2:0.12.1.2-2.113.el6_0.8.x86_64",
            "6Workstation:qemu-kvm-tools-2:0.12.1.2-2.113.el6_0.8.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "qemu-kvm: Setting VNC password to empty string silently disables all authentication"
    }
  ]
}


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