rhsa-2022_0622
Vulnerability from csaf_redhat
Published
2022-02-22 17:02
Modified
2024-11-15 14:42
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: use after free in eventpoll.c may lead to escalation of privilege (CVE-2020-0466)
* kernel: Use After Free in unix_gc() which could result in a local privilege escalation (CVE-2021-0920)
* kernel: xfs: raw block device data leak in XFS_IOC_ALLOCSP IOCTL (CVE-2021-4155)
* kernel: possible privileges escalation due to missing TLB flush (CVE-2022-0330)
* kernel: failing usercopy allows for use-after-free exploitation (CVE-2022-22942)
* kernel: out of bounds write in hid-multitouch.c may lead to escalation of privilege (CVE-2020-0465)
* kernel: double free in bluetooth subsystem when the HCI device initialization fails (CVE-2021-3564)
* kernel: use-after-free in function hci_sock_bound_ioctl() (CVE-2021-3573)
* kernel: possible use-after-free in bluetooth module (CVE-2021-3752)
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 latest RHEL7.9.z12 source tree (BZ#2039101)
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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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 eventpoll.c may lead to escalation of privilege (CVE-2020-0466)\n\n* kernel: Use After Free in unix_gc() which could result in a local privilege escalation (CVE-2021-0920)\n\n* kernel: xfs: raw block device data leak in XFS_IOC_ALLOCSP IOCTL (CVE-2021-4155)\n\n* kernel: possible privileges escalation due to missing TLB flush (CVE-2022-0330)\n\n* kernel: failing usercopy allows for use-after-free exploitation (CVE-2022-22942)\n\n* kernel: out of bounds write in hid-multitouch.c may lead to escalation of privilege (CVE-2020-0465)\n\n* kernel: double free in bluetooth subsystem when the HCI device initialization fails (CVE-2021-3564)\n\n* kernel: use-after-free in function hci_sock_bound_ioctl() (CVE-2021-3573)\n\n* kernel: possible use-after-free in bluetooth module (CVE-2021-3752)\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 latest RHEL7.9.z12 source tree (BZ#2039101)", 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-2022:0622", url: "https://access.redhat.com/errata/RHSA-2022:0622", }, { category: "external", summary: "https://access.redhat.com/security/updates/classification/#important", url: "https://access.redhat.com/security/updates/classification/#important", }, { category: "external", summary: "1920471", url: "https://bugzilla.redhat.com/show_bug.cgi?id=1920471", }, { category: "external", summary: "1920480", url: 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An out-of-bounds write triggered by a use-after-free issue could lead to memory corruption or possible privilege escalation. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.", title: "Vulnerability description", }, { category: "summary", text: "kernel: out of bounds write in hid-multitouch.c may lead to escalation of privilege", 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: [ "7Server-NFV-7.9.Z:kernel-rt-0:3.10.0-1160.59.1.rt56.1200.el7.src", "7Server-NFV-7.9.Z:kernel-rt-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", "7Server-NFV-7.9.Z:kernel-rt-debug-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", "7Server-NFV-7.9.Z:kernel-rt-debug-debuginfo-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", "7Server-NFV-7.9.Z:kernel-rt-debug-devel-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", 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A logic error in eventpoll.c can cause a use-after-free, leading to a local escalation of privilege with no additional execution privileges. User interaction is not needed for exploitation. The highest threat from this vulnerability is to confidentiality, integrity as well as system availability.", title: "Vulnerability description", }, { category: "summary", text: "kernel: use after free in eventpoll.c may lead to escalation of privilege", 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: [ "7Server-NFV-7.9.Z:kernel-rt-0:3.10.0-1160.59.1.rt56.1200.el7.src", "7Server-NFV-7.9.Z:kernel-rt-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", "7Server-NFV-7.9.Z:kernel-rt-debug-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", "7Server-NFV-7.9.Z:kernel-rt-debug-debuginfo-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", "7Server-NFV-7.9.Z:kernel-rt-debug-devel-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", 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Unix domain socket file handlers. In this flaw, a missing cleanup may lead to a use-after-free due to a race problem. This flaw allows a local user to crash the system or escalate their privileges on the system.\r\n\r\nA read-after-free memory flaw was found in the Linux kernel's garbage collection for Unix domain socket file handlers in the way users call close() and fget() simultaneously and can potentially trigger a race condition. This flaw allows a local user to crash the system or escalate their privileges on the system.", title: "Vulnerability description", }, { category: "summary", text: "kernel: Use After Free in unix_gc() which could result in a local privilege escalation", 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: [ "7Server-NFV-7.9.Z:kernel-rt-0:3.10.0-1160.59.1.rt56.1200.el7.src", "7Server-NFV-7.9.Z:kernel-rt-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", "7Server-NFV-7.9.Z:kernel-rt-debug-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", "7Server-NFV-7.9.Z:kernel-rt-debug-debuginfo-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", "7Server-NFV-7.9.Z:kernel-rt-debug-devel-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", 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hci_sock_bound_ioctl() of the Linux kernel HCI subsystem was found in the way user calls ioct HCIUNBLOCKADDR or other way triggers race condition of the call hci_unregister_dev() together with one of the calls hci_sock_blacklist_add(), hci_sock_blacklist_del(), hci_get_conn_info(), hci_get_auth_info(). A privileged local user could use this flaw to crash the system or escalate their privileges on the system.", title: "Vulnerability description", }, { category: "summary", text: "kernel: use-after-free in function hci_sock_bound_ioctl()", title: "Vulnerability summary", }, { category: "other", text: "This issue is rated as having a Moderate impact because of the privileges (CAP_NET_ADMIN in initial namespace) required for exploiting the 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: [ "7Server-NFV-7.9.Z:kernel-rt-0:3.10.0-1160.59.1.rt56.1200.el7.src", "7Server-NFV-7.9.Z:kernel-rt-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", "7Server-NFV-7.9.Z:kernel-rt-debug-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", 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This flaw allows a user to crash the system or escalate their privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.", title: "Vulnerability description", }, { category: "summary", text: "kernel: possible use-after-free in bluetooth module", title: "Vulnerability summary", }, { category: "other", text: "This issue is rated as having Moderate impact because Only local users with privileges to access the sock_dgram Bluetooth socket can trigger 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: [ "7Server-NFV-7.9.Z:kernel-rt-0:3.10.0-1160.59.1.rt56.1200.el7.src", "7Server-NFV-7.9.Z:kernel-rt-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", "7Server-NFV-7.9.Z:kernel-rt-debug-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", 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script (which resets \"0\" with XFS_BMAPI_PREALLOC), below are the steps:\n\n1) Save the following script in a 'CVE-2021-4155.stp' file\n\n--- On Red Hat Enterprise Linux 6 ---\nprobe module(\"xfs\").function(\"xfs_alloc_file_space\") {\n\tif ($alloc_type == 0)\n\t\t$alloc_type = 0x40;\t# XFS_BMAPI_PREALLOC\n}\n--- On Red Hat Enterprise Linux 6 ---\n\n--- On Red Hat Enterprise Linux 7 onwards ---\nprobe module(\"xfs\").function(\"xfs_alloc_file_space\") {\n\tif ($alloc_type == 0)\n\t\t$alloc_type = 0x8;\t# XFS_BMAPI_PREALLOC\n}\n--- On Red Hat Enterprise Linux 7 onwards ---\n\n2) Install systemtap package and its dependencies\n\n # yum install -y systemtap systemtap-runtime\n # yum install -y kernel-devel kernel-debuginfo\n\n3) Build the mitigation kernel module as root.\n\n # stap -r `uname -r` -m cve_2021_4155.ko -g CVE-2021-4155.stp -p4\n\n4) Load the mitigation module as root\n\n # staprun -L cve_2021_4155.ko\n\n\n\nWhat is SystemTap and how to use 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way a user may run malicious code on the GPU. This flaw allows a local user to crash the system or escalate their privileges on the system.", title: "Vulnerability description", }, { category: "summary", text: "kernel: possible privileges escalation due to missing TLB flush", title: "Vulnerability summary", }, { category: "other", text: "For the Red Hat Enterprise Linux default configuration, the issue occurs only if a local user is running malicious code on GPU. The GPU is used and the user is required to have privileges to access the i915 Intel GPU.", 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: [ "7Server-NFV-7.9.Z:kernel-rt-0:3.10.0-1160.59.1.rt56.1200.el7.src", "7Server-NFV-7.9.Z:kernel-rt-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", "7Server-NFV-7.9.Z:kernel-rt-debug-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", "7Server-NFV-7.9.Z:kernel-rt-debug-debuginfo-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", "7Server-NFV-7.9.Z:kernel-rt-debug-devel-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", "7Server-NFV-7.9.Z:kernel-rt-debug-kvm-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", "7Server-NFV-7.9.Z:kernel-rt-debug-kvm-debuginfo-0:3.10.0-1160.59.1.rt56.1200.el7.x86_64", 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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.