rhsa-2018_2165
Vulnerability from csaf_redhat
Published
2018-07-10 17:17
Modified
2024-11-05 20:39
Summary
Red Hat Security Advisory: kernel-rt security, and enhancement update

Notes

Topic
Updated kernel-rt packages that fix two security issues and add one enhancement are now available for Red Hat Enterprise MRG 2. Red Hat Product Security has rated this update as having a security impact of Moderate. 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: Buffer over-read in keyring subsystem allows exposing potentially sensitive information to local attacker (CVE-2017-13305) * Kernel: FPU state information leakage via lazy FPU restore (CVE-2018-3665) For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section. Red Hat would like to thank Julian Stecklina (Amazon.de), Thomas Prescher (cyberus-technology.de), and Zdenek Sojka (sysgo.com) for reporting CVE-2018-3665. Enhancement(s): * The kernel-rt packages have been upgraded to version 3.10.0-693.35.1.rt56.623, which provides a number of bug fixes over the previous version. (BZ#1579972) Users of kernel-rt are advised to upgrade to these updated packages, which add this enhancement. 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.


To clipboard 

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        "text": "Updated kernel-rt packages that fix two security issues and add one enhancement are now available for Red Hat Enterprise MRG 2.\n\nRed Hat Product Security has rated this update as having a security impact of Moderate. 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.",
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        "text": "The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.\n\nSecurity Fix(es):\n\n* kernel: Buffer over-read in keyring subsystem allows exposing potentially sensitive information to local attacker (CVE-2017-13305)\n\n* Kernel: FPU state information leakage via lazy FPU restore (CVE-2018-3665)\n\nFor more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.\n\nRed Hat would like to thank Julian Stecklina (Amazon.de), Thomas Prescher (cyberus-technology.de), and Zdenek Sojka (sysgo.com) for reporting CVE-2018-3665.\n\nEnhancement(s):\n\n* The kernel-rt packages have been upgraded to version 3.10.0-693.35.1.rt56.623, which provides a number of bug fixes over the previous version. (BZ#1579972)\n\nUsers of kernel-rt are advised to upgrade to these updated packages, which add this enhancement.\n\nThe system must be rebooted for this update to take effect.",
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            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2018:2165"
        },
        {
          "category": "workaround",
          "details": "RHEL-7 will automatically default to (safe) \u201ceager\u201d floating point register restore on Sandy Bridge and newer Intel processors. AMD processors are not affected. You can mitigate this issue on older processors by booting the kernel with the \u0027eagerfpu=on\u0027 parameter to enable eager FPU restore mode.  In this mode FPU state is saved and restored for every task/context switch regardless of whether the current process invokes FPU instructions or not. The parameter does not affect performance negatively, and can be applied with no adverse effects to processors that are not affected.",
          "product_ids": [
            "6Server-MRG-Realtime-2:kernel-rt-1:3.10.0-693.35.1.rt56.625.el6rt.src",
            "6Server-MRG-Realtime-2:kernel-rt-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debug-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debug-debuginfo-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debug-devel-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debuginfo-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
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            "6Server-MRG-Realtime-2:kernel-rt-devel-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-doc-1:3.10.0-693.35.1.rt56.625.el6rt.noarch",
            "6Server-MRG-Realtime-2:kernel-rt-firmware-1:3.10.0-693.35.1.rt56.625.el6rt.noarch",
            "6Server-MRG-Realtime-2:kernel-rt-trace-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-trace-debuginfo-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-trace-devel-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
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            "6Server-MRG-Realtime-2:kernel-rt-vanilla-debuginfo-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-vanilla-devel-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 5.6,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.0"
          },
          "products": [
            "6Server-MRG-Realtime-2:kernel-rt-1:3.10.0-693.35.1.rt56.625.el6rt.src",
            "6Server-MRG-Realtime-2:kernel-rt-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debug-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debug-debuginfo-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debug-devel-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debuginfo-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-debuginfo-common-x86_64-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-devel-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-doc-1:3.10.0-693.35.1.rt56.625.el6rt.noarch",
            "6Server-MRG-Realtime-2:kernel-rt-firmware-1:3.10.0-693.35.1.rt56.625.el6rt.noarch",
            "6Server-MRG-Realtime-2:kernel-rt-trace-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-trace-debuginfo-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-trace-devel-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-vanilla-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-vanilla-debuginfo-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64",
            "6Server-MRG-Realtime-2:kernel-rt-vanilla-devel-1:3.10.0-693.35.1.rt56.625.el6rt.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "Kernel: FPU state information leakage via lazy FPU restore"
    }
  ]
}


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