rhsa-2018_2403
Vulnerability from csaf_redhat
Published
2018-08-15 10:20
Modified
2024-09-13 12:55
Summary
Red Hat Security Advisory: redhat-virtualization-host security update

Notes

Topic
An update for redhat-release-virtualization-host and redhat-virtualization-host is now available for Red Hat Virtualization 4 for Red Hat Enterprise Linux 7. 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 redhat-virtualization-host packages provide the Red Hat Virtualization Host. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts (RHVH) are installed using a special build of Red Hat Enterprise Linux with only the packages required to host virtual machines. RHVH features a Cockpit user interface for monitoring the host's resources and performing administrative tasks. Security Fix(es): * Modern operating systems implement virtualization of physical memory to efficiently use available system resources and provide inter-domain protection through access control and isolation. The L1TF issue was found in the way the x86 microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimisation) in combination with handling of page-faults caused by terminated virtual to physical address resolving process. As a result, an unprivileged attacker could use this flaw to read privileged memory of the kernel or other processes and/or cross guest/host boundaries to read host memory by conducting targeted cache side-channel attacks. (CVE-2018-3620, CVE-2018-3646) * A flaw named SegmentSmack was found in the way the Linux kernel handled specially crafted TCP packets. A remote attacker could use this flaw to trigger time and calculation expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() functions by sending specially modified packets within ongoing TCP sessions which could lead to a CPU saturation and hence a denial of service on the system. Maintaining the denial of service condition requires continuous two-way TCP sessions to a reachable open port, thus the attacks cannot be performed using spoofed IP addresses. (CVE-2018-5390) Red Hat would like to thank Intel OSSIRT (Intel.com) for reporting CVE-2018-3620 and CVE-2018-3646 and Juha-Matti Tilli (Aalto University, Department of Communications and Networking and Nokia Bell Labs) for reporting CVE-2018-5390.
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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          "title": "Statement"
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      "release_date": "2018-08-14T17:00:00+00:00",
      "remediations": [
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          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/2974891",
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      "scores": [
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            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
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            "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": [
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          "title": "Vulnerability description"
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          "text": "Kernel: hw: cpu: L1 terminal fault (L1TF)",
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          "text": "This issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2 may address this issue.",
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      "product_status": {
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          "7Server-RHEV-4-Hypervisor-7:redhat-virtualization-host-0:4.2-20180813.0.el7_5.src",
          "7Server-RHEV-4-Hypervisor-7:redhat-virtualization-host-image-update-0:4.2-20180813.0.el7_5.noarch",
          "7Server-RHEV-4-HypervisorBuild-7:redhat-release-virtualization-host-0:4.2-5.2.el7.src",
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          "7Server-RHEV-4-HypervisorBuild-7:redhat-virtualization-host-image-update-placeholder-0:4.2-5.2.el7.noarch"
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      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2018-3646"
        },
        {
          "category": "external",
          "summary": "RHBZ#1585005",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1585005"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2018-3646",
          "url": "https://www.cve.org/CVERecord?id=CVE-2018-3646"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2018-3646",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-3646"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/articles/3562741",
          "url": "https://access.redhat.com/articles/3562741"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/security/vulnerabilities/L1TF",
          "url": "https://access.redhat.com/security/vulnerabilities/L1TF"
        },
        {
          "category": "external",
          "summary": "https://foreshadowattack.eu/",
          "url": "https://foreshadowattack.eu/"
        },
        {
          "category": "external",
          "summary": "https://software.intel.com/security-software-guidance/software-guidance/l1-terminal-fault",
          "url": "https://software.intel.com/security-software-guidance/software-guidance/l1-terminal-fault"
        },
        {
          "category": "external",
          "summary": "https://www.redhat.com/en/blog/deeper-look-l1-terminal-fault-aka-foreshadow",
          "url": "https://www.redhat.com/en/blog/deeper-look-l1-terminal-fault-aka-foreshadow"
        },
        {
          "category": "external",
          "summary": "https://www.redhat.com/en/blog/understanding-l1-terminal-fault-aka-foreshadow-what-you-need-know",
          "url": "https://www.redhat.com/en/blog/understanding-l1-terminal-fault-aka-foreshadow-what-you-need-know"
        }
      ],
      "release_date": "2018-08-14T17:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/2974891",
          "product_ids": [
            "7Server-RHEV-4-Hypervisor-7:redhat-virtualization-host-0:4.2-20180813.0.el7_5.src",
            "7Server-RHEV-4-Hypervisor-7:redhat-virtualization-host-image-update-0:4.2-20180813.0.el7_5.noarch",
            "7Server-RHEV-4-HypervisorBuild-7:redhat-release-virtualization-host-0:4.2-5.2.el7.src",
            "7Server-RHEV-4-HypervisorBuild-7:redhat-release-virtualization-host-0:4.2-5.2.el7.x86_64",
            "7Server-RHEV-4-HypervisorBuild-7:redhat-virtualization-host-image-update-placeholder-0:4.2-5.2.el7.noarch"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2018:2403"
        }
      ],
      "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": [
            "7Server-RHEV-4-Hypervisor-7:redhat-virtualization-host-0:4.2-20180813.0.el7_5.src",
            "7Server-RHEV-4-Hypervisor-7:redhat-virtualization-host-image-update-0:4.2-20180813.0.el7_5.noarch",
            "7Server-RHEV-4-HypervisorBuild-7:redhat-release-virtualization-host-0:4.2-5.2.el7.src",
            "7Server-RHEV-4-HypervisorBuild-7:redhat-release-virtualization-host-0:4.2-5.2.el7.x86_64",
            "7Server-RHEV-4-HypervisorBuild-7:redhat-virtualization-host-image-update-placeholder-0:4.2-5.2.el7.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "Kernel: hw: cpu: L1 terminal fault (L1TF)"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Juha-Matti Tilli"
          ],
          "organization": "Aalto University - Department of Communications and Networking and Nokia Bell Labs"
        }
      ],
      "cve": "CVE-2018-5390",
      "cwe": {
        "id": "CWE-400",
        "name": "Uncontrolled Resource Consumption"
      },
      "discovery_date": "2018-07-17T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1601704"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw named SegmentSmack was found in the way the Linux kernel handled specially crafted TCP packets. A remote attacker could use this flaw to trigger time and calculation expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() functions by sending specially modified packets within ongoing TCP sessions which could lead to a CPU saturation and hence a denial of service on the system. Maintaining the denial of service condition requires continuous two-way TCP sessions to a reachable open port, thus the attacks cannot be performed using spoofed IP addresses.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: TCP segments with random offsets allow a remote denial of service (SegmentSmack)",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat Product Security is aware of this issue. Updates will be released as they become available. For additional information, please refer to the Red Hat Knowledgebase article: https://access.redhat.com/articles/3553061\n\nThis issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 6, 7, its real-time kernel, Red Hat Enterprise MRG 2, Red Hat Enterprise Linux 7 for ARM 64, and Red Hat Enterprise Linux 7 for Power 9. Future kernel updates for the respective releases will address this issue.\n\nThis issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, but to a lesser degree. As such, the issue severity for RHEL5 is considered Moderate. This is not currently planned to be addressed in future updates of the product due to its life cycle and the issue severity. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.",
          "title": "Statement"
        },
        {
          "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.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "7Server-RHEV-4-Hypervisor-7:redhat-virtualization-host-0:4.2-20180813.0.el7_5.src",
          "7Server-RHEV-4-Hypervisor-7:redhat-virtualization-host-image-update-0:4.2-20180813.0.el7_5.noarch",
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      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2018-5390"
        },
        {
          "category": "external",
          "summary": "RHBZ#1601704",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1601704"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2018-5390",
          "url": "https://www.cve.org/CVERecord?id=CVE-2018-5390"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2018-5390",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-5390"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/articles/3553061",
          "url": "https://access.redhat.com/articles/3553061"
        },
        {
          "category": "external",
          "summary": "https://www.kb.cert.org/vuls/id/962459",
          "url": "https://www.kb.cert.org/vuls/id/962459"
        },
        {
          "category": "external",
          "summary": "https://www.spinics.net/lists/netdev/msg514742.html",
          "url": "https://www.spinics.net/lists/netdev/msg514742.html"
        }
      ],
      "release_date": "2018-08-06T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/2974891",
          "product_ids": [
            "7Server-RHEV-4-Hypervisor-7:redhat-virtualization-host-0:4.2-20180813.0.el7_5.src",
            "7Server-RHEV-4-Hypervisor-7:redhat-virtualization-host-image-update-0:4.2-20180813.0.el7_5.noarch",
            "7Server-RHEV-4-HypervisorBuild-7:redhat-release-virtualization-host-0:4.2-5.2.el7.src",
            "7Server-RHEV-4-HypervisorBuild-7:redhat-release-virtualization-host-0:4.2-5.2.el7.x86_64",
            "7Server-RHEV-4-HypervisorBuild-7:redhat-virtualization-host-image-update-placeholder-0:4.2-5.2.el7.noarch"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2018:2403"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.0"
          },
          "products": [
            "7Server-RHEV-4-Hypervisor-7:redhat-virtualization-host-0:4.2-20180813.0.el7_5.src",
            "7Server-RHEV-4-Hypervisor-7:redhat-virtualization-host-image-update-0:4.2-20180813.0.el7_5.noarch",
            "7Server-RHEV-4-HypervisorBuild-7:redhat-release-virtualization-host-0:4.2-5.2.el7.src",
            "7Server-RHEV-4-HypervisorBuild-7:redhat-release-virtualization-host-0:4.2-5.2.el7.x86_64",
            "7Server-RHEV-4-HypervisorBuild-7:redhat-virtualization-host-image-update-placeholder-0:4.2-5.2.el7.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "kernel: TCP segments with random offsets allow a remote denial of service (SegmentSmack)"
    }
  ]
}


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