rhsa-2012_0370
Vulnerability from csaf_redhat
Published
2012-03-07 14:32
Modified
2024-11-22 05:04
Summary
Red Hat Security Advisory: xen security and bug fix update

Notes

Topic
Updated xen packages that fix one security issue and two bugs are now available for Red Hat Enterprise Linux 5. 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 xen packages contain administration tools and the xend service for managing the kernel-xen kernel for virtualization on Red Hat Enterprise Linux. A heap overflow flaw was found in the way QEMU emulated the e1000 network interface card. A privileged guest user in a virtual machine whose network interface is configured to use the e1000 emulated driver could use this flaw to crash QEMU or, possibly, escalate their privileges on the host. (CVE-2012-0029) Red Hat would like to thank Nicolae Mogoreanu for reporting this issue. This update also fixes the following bugs: * Adding support for jumbo frames introduced incorrect network device expansion when a bridge is created. The expansion worked correctly with the default configuration, but could have caused network setup failures when a user-defined network script was used. This update changes the expansion so network setup will not fail, even when a user-defined network script is used. (BZ#797191) * A bug was found in xenconsoled, the Xen hypervisor console daemon. If timestamp logging for this daemon was enabled (using both the XENCONSOLED_TIMESTAMP_HYPERVISOR_LOG and XENCONSOLED_TIMESTAMP_GUEST_LOG options in "/etc/sysconfig/xend"), xenconsoled could crash if the guest emitted a lot of information to its serial console in a short period of time. Eventually, the guest would freeze after the console buffer was filled due to the crashed xenconsoled. Timestamp logging is disabled by default. (BZ#797836) All xen users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted 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 xen packages that fix one security issue and two bugs are now\navailable for Red Hat Enterprise Linux 5.\n\nThe Red Hat Security Response Team has rated this update as having\nimportant security impact. A Common Vulnerability Scoring System (CVSS)\nbase score, which gives a detailed severity rating, is available from the\nCVE link in the References section.",
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        "text": "The xen packages contain administration tools and the xend service for\nmanaging the kernel-xen kernel for virtualization on Red Hat Enterprise\nLinux.\n\nA heap overflow flaw was found in the way QEMU emulated the e1000 network\ninterface card. A privileged guest user in a virtual machine whose network\ninterface is configured to use the e1000 emulated driver could use this\nflaw to crash QEMU or, possibly, escalate their privileges on the host.\n(CVE-2012-0029)\n\nRed Hat would like to thank Nicolae Mogoreanu for reporting this issue.\n\nThis update also fixes the following bugs:\n\n* Adding support for jumbo frames introduced incorrect network device\nexpansion when a bridge is created. The expansion worked correctly with the\ndefault configuration, but could have caused network setup failures when a\nuser-defined network script was used. This update changes the expansion so\nnetwork setup will not fail, even when a user-defined network script is\nused. (BZ#797191)\n\n* A bug was found in xenconsoled, the Xen hypervisor console daemon. If\ntimestamp logging for this daemon was enabled (using both the\nXENCONSOLED_TIMESTAMP_HYPERVISOR_LOG and XENCONSOLED_TIMESTAMP_GUEST_LOG\noptions in \"/etc/sysconfig/xend\"), xenconsoled could crash if the guest\nemitted a lot of information to its serial console in a short period of\ntime. Eventually, the guest would freeze after the console buffer was\nfilled due to the crashed xenconsoled. Timestamp logging is disabled by\ndefault. (BZ#797836)\n\nAll xen users are advised to upgrade to these updated packages, which\ncontain backported patches to correct these issues. The system must be\nrebooted for this update to take effect.",
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          "text": "Heap-based buffer overflow in the process_tx_desc function in the e1000 emulation (hw/e1000.c) in qemu-kvm 0.12, and possibly other versions, allows guest OS users to cause a denial of service (QEMU crash) and possibly execute arbitrary code via crafted legacy mode packets.",
          "title": "Vulnerability description"
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          "text": "qemu: e1000: process_tx_desc legacy mode packets heap overflow",
          "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.",
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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2012-0029"
        },
        {
          "category": "external",
          "summary": "RHBZ#772075",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=772075"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2012-0029",
          "url": "https://www.cve.org/CVERecord?id=CVE-2012-0029"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2012-0029",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2012-0029"
        }
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      "release_date": "2012-01-23T00:00:00+00:00",
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          "date": "2012-03-07T14:32:00+00:00",
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        {
          "category": "impact",
          "details": "Important"
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      ],
      "title": "qemu: e1000: process_tx_desc legacy mode packets heap overflow"
    }
  ]
}


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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.