rhsa-2019_4057
Vulnerability from csaf_redhat
Published
2019-12-03 08:08
Modified
2024-11-15 05:18
Summary
Red Hat Security Advisory: kernel-rt security and bug fix update

Notes

Topic
An update for kernel-rt is now available for Red Hat Enterprise MRG 2. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es): * Kernel: page cache side channel attacks (CVE-2019-5489) * kernel: Handling of might_cancel queueing is not properly pretected against race (CVE-2017-10661) * kernel: Inifinite loop vulnerability in mm/madvise.c:madvise_willneed() function allows local denial of service (CVE-2017-18208) * kernel: use-after-free in drivers/char/ipmi/ipmi_si_intf.c, ipmi_si_mem_io.c, ipmi_si_port_io.c (CVE-2019-11811) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es): * update the MRG 2.5.z 3.10 realtime-kernel sources (BZ#1765670) * [MRG/R] pip_stress hangs when a priority inversion occurs (BZ#1772562)
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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        "name": "Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)"
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          "text": "A race condition was found in the Linux kernel before version 4.11-rc1 in \u0027fs/timerfd.c\u0027 file which allows a local user to cause a kernel list corruption or use-after-free via simultaneous operations with a file descriptor which leverage improper \u0027might_cancel\u0027 queuing.  An unprivileged local user could use this flaw to cause a denial of service of the system. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely.",
          "title": "Vulnerability description"
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          "text": "kernel: Handling of might_cancel queueing is not properly pretected against race",
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          "text": "This issue does not affect Red Hat Enterprise Linux 5 as the code with the flaw is not present in the products listed.\n\nThis issue affects Red Hat Enterprise Linux 6 and 7. Future updates for the respective releases may address this issue.\n\nThis issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux MRG-2. This flaw is not currently planned to be addressed in future updates due to MRG-2 being an EUS release. For additional information, refer to the Extended Update Support (EUS) Guide: https://access.redhat.com/articles/rhel-eus.",
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          "title": "Vulnerability description"
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      "cwe": {
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          "title": "Vulnerability description"
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        "name": "Use After Free"
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          "text": "A flaw was found in the Linux kernel\u0027s implementation of IPMI (remote baseband access). An attacker, with local access to read /proc/ioports, may be able to create a use-after-free condition when the kernel module is unloaded which may result in privilege escalation.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: use-after-free in drivers/char/ipmi/ipmi_si_intf.c, ipmi_si_mem_io.c, ipmi_si_port_io.c",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This flaw has been rated as \"Moderate\" as the attacker needs to be able to abuse this flaw in a very narrow race condition of the kernel module being unloaded. This scoring system from this flaw differentiates from other sources as the attacker must have a local account to be able to read the file (/proc/ioports) while the module is unloaded. None of the above actions are \u0027network facing\u0027 attack vectors.",
          "title": "Statement"
        },
        {
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          "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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            "6Server-MRG-Realtime-2:kernel-rt-vanilla-debuginfo-1:3.10.0-693.61.1.rt56.656.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-vanilla-devel-1:3.10.0-693.61.1.rt56.656.el6rt.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.0,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "6Server-MRG-Realtime-2:kernel-rt-1:3.10.0-693.61.1.rt56.656.el6rt.src",
            "6Server-MRG-Realtime-2:kernel-rt-1:3.10.0-693.61.1.rt56.656.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debug-1:3.10.0-693.61.1.rt56.656.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debug-debuginfo-1:3.10.0-693.61.1.rt56.656.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debug-devel-1:3.10.0-693.61.1.rt56.656.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debuginfo-1:3.10.0-693.61.1.rt56.656.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debuginfo-common-x86_64-1:3.10.0-693.61.1.rt56.656.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-devel-1:3.10.0-693.61.1.rt56.656.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-doc-1:3.10.0-693.61.1.rt56.656.el6rt.noarch",
            "6Server-MRG-Realtime-2:kernel-rt-firmware-1:3.10.0-693.61.1.rt56.656.el6rt.noarch",
            "6Server-MRG-Realtime-2:kernel-rt-trace-1:3.10.0-693.61.1.rt56.656.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-trace-debuginfo-1:3.10.0-693.61.1.rt56.656.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-trace-devel-1:3.10.0-693.61.1.rt56.656.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-vanilla-1:3.10.0-693.61.1.rt56.656.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-vanilla-debuginfo-1:3.10.0-693.61.1.rt56.656.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-vanilla-devel-1:3.10.0-693.61.1.rt56.656.el6rt.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "kernel: use-after-free in drivers/char/ipmi/ipmi_si_intf.c, ipmi_si_mem_io.c, ipmi_si_port_io.c"
    }
  ]
}


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