rhsa-2011_1777
Vulnerability from csaf_redhat
Published
2011-12-06 12:13
Modified
2024-11-05 17:39
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 important 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. A flaw was found in the way qemu-kvm handled VSC_ATR messages when a guest was configured for a CCID (Chip/Smart Card Interface Devices) USB smart card reader in passthrough mode. An attacker able to connect to the port on the host being used for such a device could use this flaw to crash the qemu-kvm process on the host or, possibly, escalate their privileges on the host. (CVE-2011-4111) 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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  "vulnerabilities": [
    {
      "cve": "CVE-2011-4111",
      "discovery_date": "2011-11-03T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "751310"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "Buffer overflow in the ccid_card_vscard_handle_message function in hw/ccid-card-passthru.c in QEMU before 0.15.2 and 1.x before 1.0-rc4 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted VSC_ATR message.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "qemu: ccid: buffer overflow in handling of VSC_ATR message",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue does not affect versions of kvm package as shipped with Red Hat\nEnterprise 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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          "category": "self",
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        },
        {
          "category": "external",
          "summary": "RHBZ#751310",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=751310"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2011-4111",
          "url": "https://www.cve.org/CVERecord?id=CVE-2011-4111"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2011-4111",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2011-4111"
        }
      ],
      "release_date": "2011-11-28T00:00:00+00:00",
      "remediations": [
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          "category": "vendor_fix",
          "date": "2011-12-06T12:13:00+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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            "accessVector": "ADJACENT_NETWORK",
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            "availabilityImpact": "COMPLETE",
            "baseScore": 6.8,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "COMPLETE",
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "qemu: ccid: buffer overflow in handling of VSC_ATR message"
    }
  ]
}


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