RHSA-2012:1324

Vulnerability from csaf_redhat - Published: 2012-10-02 17:01 - Updated: 2012-10-02 17:10
Summary
Red Hat Security Advisory: rhev-hypervisor5 security and bug fix update
Severity
Important
Notes
Topic: An updated rhev-hypervisor5 package that fixes one security issue and various bugs is now available. 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: The rhev-hypervisor5 package provides a Red Hat Enterprise Virtualization Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor is a dedicated Kernel-based Virtual Machine (KVM) hypervisor. It includes everything necessary to run and manage virtual machines: A subset of the Red Hat Enterprise Linux operating environment and the Red Hat Enterprise Virtualization Agent. Note: Red Hat Enterprise Virtualization Hypervisor is only available for the Intel 64 and AMD64 architectures with virtualization extensions. A flaw was found in the way socket buffers (skb) requiring TSO (TCP segment offloading) were handled by the sfc driver. If the skb did not fit within the minimum-size of the transmission queue, the network card could repeatedly reset itself. A remote attacker could use this flaw to cause a denial of service. (CVE-2012-3412) Red Hat would like to thank Ben Hutchings of Solarflare (tm) for reporting this issue. This updated package provides updated components that include fixes for various security issues. These issues have no security impact on Red Hat Enterprise Virtualization Hypervisor itself, however. The security fixes included in this update address the following CVE numbers: CVE-2012-4244 (bind issue) CVE-2012-2319, CVE-2012-3430, and CVE-2012-3510 (kernel issues) CVE-2011-3102, CVE-2012-0841, and CVE-2012-2807 (libxml2 issues) Users of Red Hat Enterprise Virtualization Hypervisor are advised to upgrade to this updated package, which fixes these issues.
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-2012-3412

The sfc (aka Solarflare Solarstorm) driver in the Linux kernel before 3.2.30 allows remote attackers to cause a denial of service (DMA descriptor consumption and network-controller outage) via crafted TCP packets that trigger a small MSS value.

7.1 ()
AV:N/AC:M/Au:N/C:N/I:N/A:C
CWE-400 - Uncontrolled Resource Consumption
Affected products
Product Identifier Version Remediation
Red Hat Virtualization
Red Hat
 —
Vendor Fix fix
Threats
Impact Important
References
Acknowledgments
Solarflare (tm) Ben Hutchings
To clipboard 

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        "title": "Topic"
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        "text": "The rhev-hypervisor5 package provides a Red Hat Enterprise Virtualization\nHypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor\nis a dedicated Kernel-based Virtual Machine (KVM) hypervisor. It includes\neverything necessary to run and manage virtual machines: A subset of the\nRed Hat Enterprise Linux operating environment and the Red Hat Enterprise\nVirtualization Agent.\n\nNote: Red Hat Enterprise Virtualization Hypervisor is only available for\nthe Intel 64 and AMD64 architectures with virtualization extensions.\n\nA flaw was found in the way socket buffers (skb) requiring TSO (TCP segment\noffloading) were handled by the sfc driver. If the skb did not fit within\nthe minimum-size of the transmission queue, the network card could\nrepeatedly reset itself. A remote attacker could use this flaw to cause a\ndenial of service. (CVE-2012-3412)\n\nRed Hat would like to thank Ben Hutchings of Solarflare (tm) for reporting\nthis issue.\n\nThis updated package provides updated components that include fixes for\nvarious security issues. These issues have no security impact on Red Hat\nEnterprise Virtualization Hypervisor itself, however. The security fixes\nincluded in this update address the following CVE numbers:\n\nCVE-2012-4244 (bind issue)\n\nCVE-2012-2319, CVE-2012-3430, and CVE-2012-3510 (kernel issues)\n\nCVE-2011-3102, CVE-2012-0841, and CVE-2012-2807 (libxml2 issues)\n\nUsers of Red Hat Enterprise Virtualization Hypervisor are advised to\nupgrade to this updated package, which fixes these issues.",
        "title": "Details"
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          "title": "CVSS score applicability"
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          "category": "description",
          "text": "The sfc (aka Solarflare Solarstorm) driver in the Linux kernel before 3.2.30 allows remote attackers to cause a denial of service (DMA descriptor consumption and network-controller outage) via crafted TCP packets that trigger a small MSS value.",
          "title": "Vulnerability description"
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          "text": "potential remote denial of service through TCP MSS option",
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            "accessVector": "NETWORK",
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            "availabilityRequirement": "NOT_DEFINED",
            "baseScore": 7.1,
            "collateralDamagePotential": "NOT_DEFINED",
            "confidentialityImpact": "NONE",
            "confidentialityRequirement": "NOT_DEFINED",
            "environmentalScore": 0.0,
            "exploitability": "NOT_DEFINED",
            "integrityImpact": "NONE",
            "integrityRequirement": "NOT_DEFINED",
            "remediationLevel": "NOT_DEFINED",
            "reportConfidence": "NOT_DEFINED",
            "targetDistribution": "NOT_DEFINED",
            "temporalScore": 0.0,
            "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:C",
            "version": "2.0"
          },
          "products": [
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2012-07-11T00:00:00Z",
          "details": "Important"
        }
      ],
      "title": "potential remote denial of service through TCP MSS option"
    }
  ]
}



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