rhsa-2011_1106
Vulnerability from csaf_redhat
Published
2011-08-02 16:45
Modified
2024-11-22 04:32
Summary
Red Hat Security Advisory: kernel security, bug fix, and enhancement update

Notes

Topic
Updated kernel packages that fix one security issue, several bugs, and add various enhancements are now available for Red Hat Enterprise Linux 6.0 Extended Update Support. 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
The kernel packages contain the Linux kernel, the core of any Linux operating system. This update fixes the following security issue: * A flaw allowed napi_reuse_skb() to be called on VLAN (virtual LAN) packets. An attacker on the local network could trigger this flaw by sending specially-crafted packets to a target system, possibly causing a denial of service. (CVE-2011-1576, Moderate) Red Hat would like to thank Ryan Sweat for reporting this issue. This update also fixes the following bugs: * The LSI SAS2 controller firmware issued an 0x620f fault while performing I/O operations and with a Task Manager running, causing possible data corruption. This update corrects this issue. (BZ#710625) * The crashkernel memory region can overlap the RunTime Abstraction Services (RTAS) memory region. If the crashkernel memory region was freed, the RTAS memory region was freed as well and the system would crash. With this update, the crash_free_reserved_phys_range() function is overridden and overlaps with the RTAS memory region are checked so that system crashes no longer occur. (BZ#710626) * If the microcode module was loaded, saving and restoring a Xen guest returned a warning message and a backtrace error. With this update, backtrace errors are no longer returned, and saving and restoring a Xen guest works as expected. (BZ#710632) * When the Distributed Lock Manager (DLM) queued three callbacks for a lock in the following sequence: blocking - completion - blocking, it would consider the final blocking callback redundant and skip it. Because the callback was skipped, GFS would not release the lock, causing processes on other nodes to wait indefinitely for it. With this update, the DLM does not skip the necessary blocking callback. (BZ#710642) * The XFRM_SUB_POLICY feature causes all bundles to be at the finest granularity possible. As a result of the data structure used to implement this, the system performance would drop considerably. This update disables a part of XFRM_SUB_POLICY, eliminating the poor performance at the cost of sub-IP address selection granularity in the policy. (BZ#710645) * A kernel panic in the mpt2sas driver could occur on an IBM system using a drive with SMART (Self-Monitoring, Analysis and Reporting Technology) issues. This was because the driver was sending an SEP request while the kernel was in the interrupt context, causing the driver to enter the sleep state. With this update, a fake event is now executed from the interrupt context, assuring the SEP request is properly issued. (BZ#714189) Finally, this update provides the following enhancements: * This update introduces a kernel module option that allows the Flow Director to be disabled. (BZ#711549) * This update introduces parallel port printer support for Red Hat Enterprise Linux 6. (BZ#713825) * This update restricts access to the /proc/kcore file to ELF headers only. (BZ#710638) Users should upgrade to these updated packages, which contain backported patches to resolve these issues and add these enhancements. 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 kernel packages that fix one security issue, several bugs, and add\nvarious enhancements are now available for Red Hat Enterprise Linux 6.0\nExtended Update Support.\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": "The kernel packages contain the Linux kernel, the core of any Linux\noperating system.\n\nThis update fixes the following security issue:\n\n* A flaw allowed napi_reuse_skb() to be called on VLAN (virtual LAN)\npackets. An attacker on the local network could trigger this flaw by\nsending specially-crafted packets to a target system, possibly causing a\ndenial of service. (CVE-2011-1576, Moderate)\n\nRed Hat would like to thank Ryan Sweat for reporting this issue.\n\nThis update also fixes the following bugs:\n\n* The LSI SAS2 controller firmware issued an 0x620f fault while performing\nI/O operations and with a Task Manager running, causing possible data\ncorruption. This update corrects this issue. (BZ#710625)\n\n* The crashkernel memory region can overlap the RunTime Abstraction\nServices (RTAS) memory region. If the crashkernel memory region was freed,\nthe RTAS memory region was freed as well and the system would crash. With\nthis update, the crash_free_reserved_phys_range() function is overridden\nand overlaps with the RTAS memory region are checked so that system crashes\nno longer occur. (BZ#710626)\n\n* If the microcode module was loaded, saving and restoring a Xen guest\nreturned a warning message and a backtrace error. With this update,\nbacktrace errors are no longer returned, and saving and restoring a Xen\nguest works as expected. (BZ#710632)\n\n* When the Distributed Lock Manager (DLM) queued three callbacks for a lock\nin the following sequence: blocking - completion - blocking, it would\nconsider the final blocking callback redundant and skip it. Because the\ncallback was skipped, GFS would not release the lock, causing processes on\nother nodes to wait indefinitely for it. With this update, the DLM does not\nskip the necessary blocking callback. (BZ#710642)\n\n* The XFRM_SUB_POLICY feature causes all bundles to be at the finest\ngranularity possible. As a result of the data structure used to implement\nthis, the system performance would drop considerably. This update disables\na part of XFRM_SUB_POLICY, eliminating the poor performance at the cost of\nsub-IP address selection granularity in the policy. (BZ#710645)\n\n* A kernel panic in the mpt2sas driver could occur on an IBM system using a\ndrive with SMART (Self-Monitoring, Analysis and Reporting Technology)\nissues. This was because the driver was sending an SEP request while the\nkernel was in the interrupt context, causing the driver to enter the sleep\nstate. With this update, a fake event is now executed from the interrupt\ncontext, assuring the SEP request is properly issued. (BZ#714189)\n\nFinally, this update provides the following enhancements:\n\n* This update introduces a kernel module option that allows the Flow\nDirector to be disabled. (BZ#711549)\n\n* This update introduces parallel port printer support for Red Hat\nEnterprise Linux 6. (BZ#713825)\n\n* This update restricts access to the /proc/kcore file to ELF headers only.\n(BZ#710638)\n\nUsers should upgrade to these updated packages, which contain backported\npatches to resolve these issues and add these enhancements. The system must\nbe rebooted for this update to take effect.",
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          "text": "This issue did not affect the version of Linux kernel as shipped with Red Hat\nEnterprise Linux 4 as it did not support Generic Receive Offload (GRO). This has been addressed in Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2011-0927.html and https://rhn.redhat.com/errata/RHSA-2011-1189.html, and https://rhn.redhat.com/errata/RHSA-2011-1253.html.",
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        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "kernel: net: Fix memory leak/corruption on VLAN GRO_DROP"
    }
  ]
}


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Sightings

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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.
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  • 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.