rhsa-2019_3309
Vulnerability from csaf_redhat
Published
2019-11-05 20:44
Modified
2024-11-15 08:27
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 Linux 8. 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: nfs: use-after-free in svc_process_common() (CVE-2018-16884) * Kernel: vhost_net: infinite loop while receiving packets leads to DoS (CVE-2019-3900) * Kernel: page cache side channel attacks (CVE-2019-5489) * hardware: bluetooth: BR/EDR encryption key negotiation attacks (KNOB) (CVE-2019-9506) * kernel: Heap overflow in mwifiex_uap_parse_tail_ies function in drivers/net/wireless/marvell/mwifiex/ie.c (CVE-2019-10126) * Kernel: KVM: OOB memory access via mmio ring buffer (CVE-2019-14821) * kernel: Information Disclosure in crypto_report_one in crypto/crypto_user.c (CVE-2018-19854) * kernel: usb: missing size check in the __usb_get_extra_descriptor() leading to DoS (CVE-2018-20169) * kernel: Heap address information leak while using L2CAP_GET_CONF_OPT (CVE-2019-3459) * kernel: Heap address information leak while using L2CAP_PARSE_CONF_RSP (CVE-2019-3460) * kernel: SCTP socket buffer memory leak leading to denial of service (CVE-2019-3874) * kernel: denial of service vector through vfio DMA mappings (CVE-2019-3882) * kernel: null-pointer dereference in hci_uart_set_flow_control (CVE-2019-10207) * kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping (CVE-2019-11599) * kernel: fs/ext4/extents.c leads to information disclosure (CVE-2019-11833) * kernel: sensitive information disclosure from kernel stack memory via HIDPCONNADD command (CVE-2019-11884) * kernel: use-after-free in arch/x86/lib/insn-eval.c (CVE-2019-13233) * kernel: memory leak in register_queue_kobjects() in net/core/net-sysfs.c leads to denial of service (CVE-2019-15916) * kernel: oob memory read in hso_probe in drivers/net/usb/hso.c (CVE-2018-19985) * Kernel: KVM: leak of uninitialized stack contents to guest (CVE-2019-7222) * Kernel: net: weak IP ID generation leads to remote device tracking (CVE-2019-10638) 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. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.1 Release Notes linked from the References section.
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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          "names": [
            "Evgenii Shatokhin",
            "Vasily Averin"
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          "organization": "Virtuozzo"
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        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s NFS41+ subsystem. NFS41+ shares mounted in different network namespaces at the same time can make bc_svc_process() use wrong back-channel IDs and cause a use-after-free vulnerability. Thus a malicious container user can cause a host kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: nfs: use-after-free in svc_process_common()",
          "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.",
          "title": "CVSS score applicability"
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          "title": "Vulnerability description"
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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2019-3459"
        },
        {
          "category": "external",
          "summary": "RHBZ#1663176",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1663176"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2019-3459",
          "url": "https://www.cve.org/CVERecord?id=CVE-2019-3459"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2019-3459",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-3459"
        }
      ],
      "release_date": "2019-01-11T00:00:00+00:00",
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          "date": "2019-11-05T20:44:12+00:00",
          "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/11258\n\nThe system must be rebooted for this update to take effect.",
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      "title": "kernel: Heap address information leak while using L2CAP_GET_CONF_OPT"
    },
    {
      "cve": "CVE-2019-3460",
      "cwe": {
        "id": "CWE-200",
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s implementation of logical link control and adaptation protocol (L2CAP), part of the Bluetooth stack in the l2cap_parse_conf_rsp and l2cap_parse_conf_req functions. An attacker with physical access within the range of standard Bluetooth transmission can create a specially crafted packet. The response to this specially crafted packet can contain part of the kernel stack which can be used in a further attack.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: Heap address information leak while using L2CAP_PARSE_CONF_RSP",
          "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.",
          "title": "CVSS score applicability"
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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/11258\n\nThe system must be rebooted for this update to take effect.",
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      "title": "kernel: Heap address information leak while using L2CAP_PARSE_CONF_RSP"
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          "names": [
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          "category": "description",
          "text": "The SCTP socket buffer used by a userspace application is not accounted by the cgroups subsystem. An attacker can use this flaw to cause a denial of service attack.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: SCTP socket buffer memory leak leading to denial of service",
          "title": "Vulnerability summary"
        },
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          "text": "While this issue affects the Linux Kernel in Red Hat Enterprise Linux, and not OpenShift Container Platform (OCP) 3 code directly. OCP 3 makes use of CGroups in the Kernel to measure and report on the amount of system resources used by an end user application.\n\nThe default Security Context Constraints (SCC) in OpenShift Container Platform 3.x disallow an end user from running a container as root. Also a check is performed by the OCP 3 Installer to ensure SELinux is enabled, [1].\n\n[1] https://github.com/openshift/openshift-ansible/blob/006fb14e9a28df9bd1a58ac376bbdf3eba50fa51/roles/openshift_node/tasks/main.yml#L3",
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          "title": "Vulnerability description"
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          "title": "Vulnerability summary"
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          "title": "Vulnerability description"
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          "text": "Kernel: vhost_net: infinite loop while receiving packets leads to DoS",
          "title": "Vulnerability summary"
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          "text": "This issue does not affect the versions of the kernel package as shipped with Red Hat Enterprise Linux 5 and Red Hat Enterprise MRG 2.\n\nThis issue affects the version of Linux kernel as shipped with Red Hat Enterprise Linux 6 and 7. Future kernel updates for Red Hat Enterprise Linux 6 and 7 may address this issue.",
          "title": "Statement"
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          "text": "An information leakage issue was found in the way Linux kernel\u0027s KVM hypervisor handled page fault exceptions while emulating instructions like VMXON, VMCLEAR, VMPTRLD, and VMWRITE with memory address as an operand. It occurs if the operand is a mmio address, as the returned exception object holds uninitialized stack memory contents. A guest user/process could use this flaw to leak host\u0027s stack memory contents to a guest.",
          "title": "Vulnerability description"
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          "title": "Statement"
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          "title": "Vulnerability description"
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          "title": "Vulnerability description"
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          "title": "Statement"
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          "title": "Vulnerability summary"
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          "text": "This issue requires unprivileged users to have access to \u0027/dev/kvm\u0027 device. So restricting access to \u0027/dev/kvm\u0027 device to known trusted users could limit its exploitation by untrusted users/processes.",
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          "title": "Vulnerability description"
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      "title": "kernel: memory leak in register_queue_kobjects() in net/core/net-sysfs.c leads to denial of service"
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      "cve": "CVE-2019-15921",
      "cwe": {
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          "text": "1760958"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the genl_register_family function in the Linux kernel. An attacker able to induce the error conditions could use this flaw to crash the system. The highest threat from this vulnerability is to system availability.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: memory leak in genl_register_family() in net/netlink/genetlink.c",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue is rated as having Low impact because of the preconditions needed to trigger the error/resource cleanup code path (system-wide out-of-memory condition, high privileges or physical access). The generic netlink is a way for kernel modues to easily communicate with userspace using netlink. genl_register_family is thus called by kernel modules (code) only and it\u0027s hard for an attacker to invoke (module reloads?) it let alone fail on the right place.",
          "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"
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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/11258\n\nThe system must be rebooted for this update to take effect.",
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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2019-16994"
        },
        {
          "category": "external",
          "summary": "RHBZ#1759681",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1759681"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2019-16994",
          "url": "https://www.cve.org/CVERecord?id=CVE-2019-16994"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2019-16994",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-16994"
        }
      ],
      "release_date": "2019-09-30T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2019-11-05T20:44:12+00:00",
          "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/11258\n\nThe system must be rebooted for this update to take effect.",
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      "title": "kernel: Memory leak in sit_init_net() in net/ipv6/sit.c"
    },
    {
      "cve": "CVE-2020-10720",
      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
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      "notes": [
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          "text": "A flaw was found in the Linux kernel\u2019s implementation of GRO. This flaw allows an attacker with local access to crash the system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: use-after-free read in napi_gro_frags() in the Linux kernel",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue is rated as having Moderate impact because it appears to be limited to only to a crash.",
          "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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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2020-10720"
        },
        {
          "category": "external",
          "summary": "RHBZ#1781204",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1781204"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2020-10720",
          "url": "https://www.cve.org/CVERecord?id=CVE-2020-10720"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-10720",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-10720"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a4270d6795b0580287453ea55974d948393e66ef",
          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a4270d6795b0580287453ea55974d948393e66ef"
        }
      ],
      "release_date": "2019-12-09T14:23:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2019-11-05T20:44:12+00:00",
          "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/11258\n\nThe system must be rebooted for this update to take effect.",
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            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
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      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "kernel: use-after-free read in napi_gro_frags() in the Linux kernel"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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