rhsa-2022_1417
Vulnerability from csaf_redhat
Published
2022-04-19 16:19
Modified
2024-11-06 00:41
Summary
Red Hat Security Advisory: kernel security update
Notes
Topic
An update for kernel is now available for Red Hat Enterprise Linux 6 Extended Lifecycle Support.
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 packages contain the Linux kernel, the core of any Linux operating system.
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: cgroups v1 release_agent feature may allow privilege escalation (CVE-2022-0492)
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.
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 is now available for Red Hat Enterprise Linux 6 Extended Lifecycle Support.\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 packages contain the Linux kernel, the core of any Linux operating system.\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: cgroups v1 release_agent feature may allow privilege escalation (CVE-2022-0492)\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.", "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-2022:1417", "url": "https://access.redhat.com/errata/RHSA-2022:1417" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#important", "url": "https://access.redhat.com/security/updates/classification/#important" }, { "category": "external", "summary": "1920480", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1920480" }, { "category": "external", "summary": "2031930", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2031930" }, { "category": "external", "summary": "2034813", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2034813" }, { "category": "external", "summary": "2051505", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2051505" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2022/rhsa-2022_1417.json" } ], "title": "Red Hat Security Advisory: kernel security update", "tracking": { "current_release_date": "2024-11-06T00:41:04+00:00", "generator": { "date": "2024-11-06T00:41:04+00:00", "engine": { "name": "Red Hat SDEngine", "version": "4.1.1" } }, "id": "RHSA-2022:1417", "initial_release_date": "2022-04-19T16:19:00+00:00", "revision_history": [ { "date": "2022-04-19T16:19:00+00:00", "number": "1", "summary": "Initial version" }, { "date": "2022-04-19T16:19:00+00:00", "number": "2", "summary": "Last updated version" }, { "date": "2024-11-06T00:41:04+00:00", 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"id": "CWE-416", "name": "Use After Free" }, "discovery_date": "2021-01-18T00:00:00+00:00", "flags": [ { "label": "vulnerable_code_not_present", "product_ids": [ "6Server-ELS:kernel-headers-0:2.6.32-754.47.1.el6.i686", "6Server-ELS:kernel-headers-0:2.6.32-754.47.1.el6.s390x", "6Server-ELS:kernel-headers-0:2.6.32-754.47.1.el6.x86_64", "6Server-optional-ELS:kernel-headers-0:2.6.32-754.47.1.el6.i686", "6Server-optional-ELS:kernel-headers-0:2.6.32-754.47.1.el6.s390x", "6Server-optional-ELS:kernel-headers-0:2.6.32-754.47.1.el6.x86_64" ] } ], "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "1920480" } ], "notes": [ { "category": "description", "text": "A flaw was found in the Linux kernel. 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\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "6Server-ELS:kernel-0:2.6.32-754.47.1.el6.i686", "6Server-ELS:kernel-0:2.6.32-754.47.1.el6.s390x", "6Server-ELS:kernel-0:2.6.32-754.47.1.el6.src", "6Server-ELS:kernel-0:2.6.32-754.47.1.el6.x86_64", "6Server-ELS:kernel-abi-whitelists-0:2.6.32-754.47.1.el6.noarch", "6Server-ELS:kernel-debug-0:2.6.32-754.47.1.el6.i686", "6Server-ELS:kernel-debug-0:2.6.32-754.47.1.el6.s390x", 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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\u0027s 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\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "6Server-ELS:kernel-0:2.6.32-754.47.1.el6.i686", "6Server-ELS:kernel-0:2.6.32-754.47.1.el6.s390x", "6Server-ELS:kernel-0:2.6.32-754.47.1.el6.src", "6Server-ELS:kernel-0:2.6.32-754.47.1.el6.x86_64", "6Server-ELS:kernel-abi-whitelists-0:2.6.32-754.47.1.el6.noarch", "6Server-ELS:kernel-debug-0:2.6.32-754.47.1.el6.i686", "6Server-ELS:kernel-debug-0:2.6.32-754.47.1.el6.s390x", 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"cwe": { "id": "CWE-131", "name": "Incorrect Calculation of Buffer Size" }, "discovery_date": "2021-12-18T00:00:00+00:00", "flags": [ { "label": "vulnerable_code_not_present", "product_ids": [ "6Server-ELS:kernel-headers-0:2.6.32-754.47.1.el6.i686", "6Server-ELS:kernel-headers-0:2.6.32-754.47.1.el6.s390x", "6Server-ELS:kernel-headers-0:2.6.32-754.47.1.el6.x86_64", "6Server-optional-ELS:kernel-headers-0:2.6.32-754.47.1.el6.i686", "6Server-optional-ELS:kernel-headers-0:2.6.32-754.47.1.el6.s390x", "6Server-optional-ELS:kernel-headers-0:2.6.32-754.47.1.el6.x86_64" ] } ], "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "2034813" } ], "notes": [ { "category": "description", "text": "A data leak flaw was found in the way XFS_IOC_ALLOCSP IOCTL in the XFS filesystem allowed for size increase of files with unaligned size. A local attacker could use this flaw to leak data on the XFS filesystem otherwise not accessible to them.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: xfs: raw block device data leak in XFS_IOC_ALLOCSP IOCTL", "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" } ], "product_status": { "fixed": [ "6Server-ELS:kernel-0:2.6.32-754.47.1.el6.i686", "6Server-ELS:kernel-0:2.6.32-754.47.1.el6.s390x", "6Server-ELS:kernel-0:2.6.32-754.47.1.el6.src", "6Server-ELS:kernel-0:2.6.32-754.47.1.el6.x86_64", "6Server-ELS:kernel-abi-whitelists-0:2.6.32-754.47.1.el6.noarch", "6Server-ELS:kernel-debug-0:2.6.32-754.47.1.el6.i686", "6Server-ELS:kernel-debug-0:2.6.32-754.47.1.el6.s390x", 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XFS_BMAPI_PREALLOC), below are the steps:\n\n1) Save the following script in a \u0027CVE-2021-4155.stp\u0027 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 it?\nhttps://access.redhat.com/solutions/5441", 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This flaw, under certain circumstances, allows the use of the cgroups v1 release_agent feature to escalate privileges and bypass the namespace isolation unexpectedly.", "title": "Vulnerability description" }, { "category": "summary", "text": "kernel: cgroups v1 release_agent feature may allow privilege escalation", "title": "Vulnerability summary" }, { "category": "other", "text": "In the OpenShift Container Platform (OCP) the container escape and privilege escalation caused by the CVE-2022-0492 vulnerability are blocked by the SELinux policy enabled (by default) on the OCP cluster nodes.\n\nRed Hat Virtualization requires SELinux running in enforcing mode[1] on all hypervisors and managers, which blocks this vulnerability.\n\n1. https://access.redhat.com/solutions/499473", "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": [ "6Server-ELS:kernel-0:2.6.32-754.47.1.el6.i686", "6Server-ELS:kernel-0:2.6.32-754.47.1.el6.s390x", "6Server-ELS:kernel-0:2.6.32-754.47.1.el6.src", "6Server-ELS:kernel-0:2.6.32-754.47.1.el6.x86_64", "6Server-ELS:kernel-abi-whitelists-0:2.6.32-754.47.1.el6.noarch", "6Server-ELS:kernel-debug-0:2.6.32-754.47.1.el6.i686", "6Server-ELS:kernel-debug-0:2.6.32-754.47.1.el6.s390x", "6Server-ELS:kernel-debug-0:2.6.32-754.47.1.el6.x86_64", "6Server-ELS:kernel-debug-debuginfo-0:2.6.32-754.47.1.el6.i686", "6Server-ELS:kernel-debug-debuginfo-0:2.6.32-754.47.1.el6.s390x", "6Server-ELS:kernel-debug-debuginfo-0:2.6.32-754.47.1.el6.x86_64", "6Server-ELS:kernel-debug-devel-0:2.6.32-754.47.1.el6.i686", "6Server-ELS:kernel-debug-devel-0:2.6.32-754.47.1.el6.s390x", "6Server-ELS:kernel-debug-devel-0:2.6.32-754.47.1.el6.x86_64", "6Server-ELS:kernel-debuginfo-0:2.6.32-754.47.1.el6.i686", 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escalation" } ] }
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- 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.