rhsa-2020_3016
Vulnerability from csaf_redhat
Published
2020-07-21 11:24
Modified
2024-11-15 08:33
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: use-after-free in sound/core/timer.c (CVE-2019-19807)
* kernel: kernel: DAX hugepages not considered during mremap (CVE-2020-10757)
* kernel: Rogue cross-process SSBD shutdown. Linux scheduler logical bug allows an attacker to turn off the SSBD protection. (CVE-2020-10766)
* kernel: Indirect Branch Prediction Barrier is force-disabled when STIBP is unavailable or enhanced IBRS is available. (CVE-2020-10767)
* kernel: Indirect branch speculation can be enabled after it was force-disabled by the PR_SPEC_FORCE_DISABLE prctl command. (CVE-2020-10768)
* kernel: buffer overflow in mwifiex_cmd_append_vsie_tlv function in drivers/net/wireless/marvell/mwifiex/scan.c (CVE-2020-12653)
* kernel: heap-based buffer overflow in mwifiex_ret_wmm_get_status function in drivers/net/wireless/marvell/mwifiex/wmm.c (CVE-2020-12654)
* Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario (CVE-2020-12888)
* kernel: kvm: Information leak within a KVM guest (CVE-2019-3016)
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):
* kernel-rt: update RT source tree to the RHEL-8.2.z2 source tree (BZ#1829582)
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.
{ document: { aggregate_severity: { namespace: "https://access.redhat.com/security/updates/classification/", text: "Important", }, category: "csaf_security_advisory", csaf_version: "2.0", distribution: { text: "Copyright © Red Hat, Inc. All rights reserved.", tlp: { label: "WHITE", url: "https://www.first.org/tlp/", }, }, lang: "en", notes: [ { category: "summary", text: "An update for kernel-rt is now available for Red Hat Enterprise Linux 8.\n\nRed 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.", title: "Topic", }, { category: "general", 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: use-after-free in sound/core/timer.c (CVE-2019-19807)\n\n* kernel: kernel: DAX hugepages not considered during mremap (CVE-2020-10757)\n\n* kernel: Rogue cross-process SSBD shutdown. Linux scheduler logical bug allows an attacker to turn off the SSBD protection. (CVE-2020-10766)\n\n* kernel: Indirect Branch Prediction Barrier is force-disabled when STIBP is unavailable or enhanced IBRS is available. (CVE-2020-10767)\n\n* kernel: Indirect branch speculation can be enabled after it was force-disabled by the PR_SPEC_FORCE_DISABLE prctl command. (CVE-2020-10768)\n\n* kernel: buffer overflow in mwifiex_cmd_append_vsie_tlv function in drivers/net/wireless/marvell/mwifiex/scan.c (CVE-2020-12653)\n\n* kernel: heap-based buffer overflow in mwifiex_ret_wmm_get_status function in drivers/net/wireless/marvell/mwifiex/wmm.c (CVE-2020-12654)\n\n* Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario (CVE-2020-12888)\n\n* kernel: kvm: Information leak within a KVM guest (CVE-2019-3016)\n\nFor 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.\n\nBug Fix(es):\n\n* kernel-rt: update RT source tree to the RHEL-8.2.z2 source tree (BZ#1829582)", title: "Details", }, { category: "legal_disclaimer", text: "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.", title: "Terms of Use", }, ], publisher: { category: "vendor", contact_details: "https://access.redhat.com/security/team/contact/", issuing_authority: "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.", name: "Red Hat Product Security", namespace: "https://www.redhat.com", }, references: [ { category: "self", summary: "https://access.redhat.com/errata/RHSA-2020:3016", url: "https://access.redhat.com/errata/RHSA-2020:3016", }, { category: "external", summary: "https://access.redhat.com/security/updates/classification/#important", url: "https://access.redhat.com/security/updates/classification/#important", }, { category: "external", summary: "1786078", url: "https://bugzilla.redhat.com/show_bug.cgi?id=1786078", }, { category: "external", summary: "1792167", url: 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A race condition may occur between the guest issuing a deferred TLB flush request to KVM, and then KVM handling and acknowledging it. This may result in invalid address translations from TLB being used to access guest memory, leading to a potential information leakage issue. An attacker may use this flaw to access guest memory locations that it should not have access to.", title: "Vulnerability description", }, { category: "summary", text: "kernel: kvm: Information leak within a KVM guest", title: "Vulnerability summary", }, { category: "general", text: "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", title: "CVSS score applicability", }, ], product_status: { fixed: [ "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-193.13.2.rt13.65.el8_2.src", "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-193.13.2.rt13.65.el8_2.x86_64", "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-core-0:4.18.0-193.13.2.rt13.65.el8_2.x86_64", "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-debug-0:4.18.0-193.13.2.rt13.65.el8_2.x86_64", "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-debug-core-0:4.18.0-193.13.2.rt13.65.el8_2.x86_64", 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The struct snd_timer_instance function fails the timer->max_instances check leading to an invalid address. This could lead to a use-after-free vulnerability.", title: "Vulnerability description", }, { category: "summary", text: "kernel: use-after-free in sound/core/timer.c", title: "Vulnerability summary", }, { category: "other", text: "This issue affected Linux kernel versions as shipped with Red Hat Enterprise Linux 8 starting with RHEL-8.1.0, that is Red Hat Enterprise Linux 8.1 GA kernel version.", title: "Statement", }, { category: "general", text: "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", title: "CVSS score applicability", }, ], product_status: { fixed: [ "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-193.13.2.rt13.65.el8_2.src", "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-193.13.2.rt13.65.el8_2.x86_64", "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-core-0:4.18.0-193.13.2.rt13.65.el8_2.x86_64", 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[ "Fan Yang", ], }, ], cve: "CVE-2020-10757", cwe: { id: "CWE-119", name: "Improper Restriction of Operations within the Bounds of a Memory Buffer", }, discovery_date: "2020-05-30T00:00:00+00:00", ids: [ { system_name: "Red Hat Bugzilla ID", text: "1842525", }, ], notes: [ { category: "description", text: "A flaw was found in the way mremap handled DAX Huge Pages. This flaw allows a local attacker with access to a DAX enabled storage to escalate their privileges on the system.", title: "Vulnerability description", }, { category: "summary", text: "kernel: kernel: DAX hugepages not considered during mremap", title: "Vulnerability summary", }, { category: "other", text: "This issue requires access to a DAX enabled storage.\n\nThis issue affects Red Hat Enterprise Linux 7 kernels starting with kernel-3.10.0-862, that is Red Hat Enterprise Linux 7.5 GA kernel. Red Hat Enterprise Linux 7 kernels prior to that version are not affected as they did not include the functionality that enabled this issue to be exploited.\n\nRed Hat Product Security is aware of this issue. 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A bug in the logic handling allows an attacker with a local account to disable SSBD protection during a context switch when additional speculative execution mitigations are in place. This issue was introduced when the per task/process conditional STIPB switching was added on top of the existing SSBD switching. The highest threat from this vulnerability is to confidentiality.", title: "Vulnerability description", }, { category: "summary", text: "kernel: Rogue cross-process SSBD shutdown. 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Linux scheduler logical bug allows an attacker to turn off the SSBD protection.", }, { cve: "CVE-2020-10767", cwe: { id: "CWE-440", name: "Expected Behavior Violation", }, discovery_date: "2020-06-10T00:00:00+00:00", ids: [ { system_name: "Red Hat Bugzilla ID", text: "1845867", }, ], notes: [ { category: "description", text: "A flaw was found in the Linux kernel’s implementation of the Enhanced IBPB (Indirect Branch Prediction Barrier). The IBPB mitigation will be disabled when STIBP is not available or when the Enhanced Indirect Branch Restricted Speculation (IBRS) is available. This flaw allows a local attacker to perform a Spectre V2 style attack when this configuration is active. The highest threat from this vulnerability is to confidentiality.", title: "Vulnerability description", }, { category: "summary", text: "kernel: Indirect Branch Prediction Barrier is force-disabled when STIBP is unavailable or enhanced IBRS is available.", title: "Vulnerability summary", }, { category: "other", text: "This flaw is rated as having Important impact, because it enables exploitation of the previous Spectre v2 attack, which has a rating of Important.", title: "Statement", }, { category: "general", text: "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", title: "CVSS score applicability", }, ], product_status: { fixed: [ "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-193.13.2.rt13.65.el8_2.src", "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-193.13.2.rt13.65.el8_2.x86_64", 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This call incorrectly reports it as being 'force disabled' when it is not and opens the system to Spectre v2 attacks. The highest threat from this vulnerability is to confidentiality.", title: "Vulnerability description", }, { category: "summary", text: "kernel: Indirect branch speculation can be enabled after it was force-disabled by the PR_SPEC_FORCE_DISABLE prctl command.", title: "Vulnerability summary", }, { category: "other", text: "This flaw is rated as having Important impact, because it enables exploitation of the previous Spectre v2 attack, which has a rating of Important.", title: "Statement", }, { category: "general", text: "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", title: "CVSS score applicability", }, ], product_status: { fixed: [ "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-193.13.2.rt13.65.el8_2.src", "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-193.13.2.rt13.65.el8_2.x86_64", 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title: "kernel: buffer overflow in mwifiex_cmd_append_vsie_tlv function in drivers/net/wireless/marvell/mwifiex/scan.c", }, { cve: "CVE-2020-12654", cwe: { id: "CWE-122", name: "Heap-based Buffer Overflow", }, discovery_date: "2020-05-05T00:00:00+00:00", ids: [ { system_name: "Red Hat Bugzilla ID", text: "1832530", }, ], notes: [ { category: "description", text: "A flaw was found in the Linux kernel. The Marvell mwifiex driver allows a remote WiFi access point to trigger a heap-based memory buffer overflow due to an incorrect memcpy operation. The highest threat from this vulnerability is to data integrity and system availability.", title: "Vulnerability description", }, { category: "summary", text: "kernel: heap-based buffer overflow in mwifiex_ret_wmm_get_status function in drivers/net/wireless/marvell/mwifiex/wmm.c", title: "Vulnerability summary", }, { category: "general", text: "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", title: "CVSS score applicability", }, ], product_status: { fixed: [ "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-193.13.2.rt13.65.el8_2.src", "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-193.13.2.rt13.65.el8_2.x86_64", "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-core-0:4.18.0-193.13.2.rt13.65.el8_2.x86_64", "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-debug-0:4.18.0-193.13.2.rt13.65.el8_2.x86_64", "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-debug-core-0:4.18.0-193.13.2.rt13.65.el8_2.x86_64", 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title: "kernel: heap-based buffer overflow in mwifiex_ret_wmm_get_status function in drivers/net/wireless/marvell/mwifiex/wmm.c", }, { cve: "CVE-2020-12888", cwe: { id: "CWE-248", name: "Uncaught Exception", }, discovery_date: "2020-04-23T00:00:00+00:00", ids: [ { system_name: "Red Hat Bugzilla ID", text: "1836244", }, ], notes: [ { category: "description", text: "A flaw was found in the Linux kernel, where it allows userspace processes, for example, a guest VM, to directly access h/w devices via its VFIO driver modules. The VFIO modules allow users to enable or disable access to the devices' MMIO memory address spaces. If a user attempts to access the read/write devices' MMIO address space when it is disabled, some h/w devices issue an interrupt to the CPU to indicate a fatal error condition, crashing the system. This flaw allows a guest user or process to crash the host system resulting in a denial of service.", title: "Vulnerability description", }, { category: "summary", text: "Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario", title: "Vulnerability summary", }, { category: "other", text: "This issue does not affect the versions of the kernel package as shipped with Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2.\nThis issue affects the versions of the kernel package as shipped with Red Hat Enterprise Linux 7 and 8. Future kernel updates for Red Hat Enterprise Linux 7 and 8 may address this issue.", title: "Statement", }, { category: "general", text: "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", title: "CVSS score applicability", }, ], product_status: { fixed: [ "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-193.13.2.rt13.65.el8_2.src", "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-193.13.2.rt13.65.el8_2.x86_64", "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-core-0:4.18.0-193.13.2.rt13.65.el8_2.x86_64", "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-debug-0:4.18.0-193.13.2.rt13.65.el8_2.x86_64", "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-debug-core-0:4.18.0-193.13.2.rt13.65.el8_2.x86_64", "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-debug-debuginfo-0:4.18.0-193.13.2.rt13.65.el8_2.x86_64", "NFV-8.2.0.Z.MAIN.EUS:kernel-rt-debug-devel-0:4.18.0-193.13.2.rt13.65.el8_2.x86_64", 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title: "Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario", }, ], }
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Sightings
| Author | Source | Type | Date |
|---|
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.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- 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.