rhsa-2019_3978
Vulnerability from csaf_redhat
Published
2019-11-26 13:59
Modified
2024-11-05 21:38
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 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 kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.
Security Fix(es):
* Kernel: KVM: OOB memory access via mmio ring buffer (CVE-2019-14821)
* kernel: local attacker can trigger multiple use-after-free conditions results in privilege escalation (CVE-2019-15239)
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 to the RHEL7.7.z batch#3 source tree (BZ#1762889)
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 \u00a9 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 7.\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: KVM: OOB memory access via mmio ring buffer (CVE-2019-14821)\n\n* kernel: local attacker can trigger multiple use-after-free conditions results in privilege escalation (CVE-2019-15239)\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 to the RHEL7.7.z batch#3 source tree (BZ#1762889)", "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-2019:3978", "url": "https://access.redhat.com/errata/RHSA-2019:3978" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#important", "url": "https://access.redhat.com/security/updates/classification/#important" }, { "category": "external", "summary": "1746708", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1746708" }, { "category": "external", "summary": "1747353", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1747353" }, { "category": "external", "summary": "1762889", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1762889" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2019/rhsa-2019_3978.json" } ], "title": "Red Hat Security Advisory: kernel-rt security and bug fix update", "tracking": { "current_release_date": "2024-11-05T21:38:15+00:00", "generator": { "date": "2024-11-05T21:38:15+00:00", "engine": { "name": "Red Hat SDEngine", "version": "4.1.1" } }, "id": "RHSA-2019:3978", "initial_release_date": "2019-11-26T13:59:01+00:00", "revision_history": [ { "date": "2019-11-26T13:59:01+00:00", "number": "1", "summary": "Initial version" }, { "date": "2019-11-26T13:59:01+00:00", "number": "2", "summary": "Last updated version" }, { "date": "2024-11-05T21:38:15+00:00", "number": "3", "summary": "Last generated version" } ], "status": "final", "version": "3" } }, 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It operates on an MMIO ring buffer \u0027struct kvm_coalesced_mmio\u0027 object, wherein write indices \u0027ring-\u003efirst\u0027 and \u0027ring-\u003elast\u0027 value could be supplied by a host user-space process. An unprivileged host user or process with access to \u0027/dev/kvm\u0027 device could use this flaw to crash the host kernel, resulting in a denial of service or potentially escalating privileges on the system.", "title": "Vulnerability description" }, { "category": "summary", "text": "Kernel: KVM: OOB memory access via mmio ring buffer", "title": "Vulnerability summary" }, { "category": "other", "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.", "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-NFV-7.7.Z:kernel-rt-0:3.10.0-1062.7.1.rt56.1030.el7.src", "7Server-NFV-7.7.Z:kernel-rt-0:3.10.0-1062.7.1.rt56.1030.el7.x86_64", "7Server-NFV-7.7.Z:kernel-rt-debug-0:3.10.0-1062.7.1.rt56.1030.el7.x86_64", "7Server-NFV-7.7.Z:kernel-rt-debug-debuginfo-0:3.10.0-1062.7.1.rt56.1030.el7.x86_64", "7Server-NFV-7.7.Z:kernel-rt-debug-devel-0:3.10.0-1062.7.1.rt56.1030.el7.x86_64", "7Server-NFV-7.7.Z:kernel-rt-debug-kvm-0:3.10.0-1062.7.1.rt56.1030.el7.x86_64", 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"category": "impact", "details": "Important" } ], "title": "Kernel: KVM: OOB memory access via mmio ring buffer" }, { "cve": "CVE-2019-15239", "cwe": { "id": "CWE-416", "name": "Use After Free" }, "discovery_date": "2019-08-21T00:00:00+00:00", "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "1747353" } ], "notes": [ { "category": "description", "text": "A flaw was found in the way the Linux kernel\u0027s networking subsystem handled the write queue between TCP disconnection and re-connections. A local attacker could use this flaw to trigger multiple use-after-free conditions potentially escalating their privileges on the system.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: local attacker can trigger multiple use-after-free conditions results in privilege escalation", "title": "Vulnerability summary" }, { "category": "other", "text": "This issue affected Red Hat Enterprise Linux 7 starting with kernel version kernel-3.10.0-1053.el7. The first publicly available affected kernel version is kernel-3.10.0-1062.el7 released via https://access.redhat.com/errata/RHSA-2019:2029, the Red Hat Enterprise Linux 7.7 GA kernel errata release.", "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-NFV-7.7.Z:kernel-rt-0:3.10.0-1062.7.1.rt56.1030.el7.src", "7Server-NFV-7.7.Z:kernel-rt-0:3.10.0-1062.7.1.rt56.1030.el7.x86_64", "7Server-NFV-7.7.Z:kernel-rt-debug-0:3.10.0-1062.7.1.rt56.1030.el7.x86_64", "7Server-NFV-7.7.Z:kernel-rt-debug-debuginfo-0:3.10.0-1062.7.1.rt56.1030.el7.x86_64", "7Server-NFV-7.7.Z:kernel-rt-debug-devel-0:3.10.0-1062.7.1.rt56.1030.el7.x86_64", "7Server-NFV-7.7.Z:kernel-rt-debug-kvm-0:3.10.0-1062.7.1.rt56.1030.el7.x86_64", 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"https://nvd.nist.gov/vuln/detail/CVE-2019-15239" } ], "release_date": "2019-08-20T00:00:00+00:00", "remediations": [ { "category": "vendor_fix", "date": "2019-11-26T13:59:01+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.", "product_ids": [ "7Server-NFV-7.7.Z:kernel-rt-0:3.10.0-1062.7.1.rt56.1030.el7.src", "7Server-NFV-7.7.Z:kernel-rt-0:3.10.0-1062.7.1.rt56.1030.el7.x86_64", "7Server-NFV-7.7.Z:kernel-rt-debug-0:3.10.0-1062.7.1.rt56.1030.el7.x86_64", "7Server-NFV-7.7.Z:kernel-rt-debug-debuginfo-0:3.10.0-1062.7.1.rt56.1030.el7.x86_64", "7Server-NFV-7.7.Z:kernel-rt-debug-devel-0:3.10.0-1062.7.1.rt56.1030.el7.x86_64", "7Server-NFV-7.7.Z:kernel-rt-debug-kvm-0:3.10.0-1062.7.1.rt56.1030.el7.x86_64", "7Server-NFV-7.7.Z:kernel-rt-debug-kvm-debuginfo-0:3.10.0-1062.7.1.rt56.1030.el7.x86_64", 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multiple use-after-free conditions results in privilege escalation" } ] }
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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.