RHSA-2023:5091
Vulnerability from csaf_redhat
Published
2023-09-12 09:53
Modified
2025-02-28 01:22
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 9.
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: UAF in nftables when nft_set_lookup_global triggered after handling named and anonymous sets in batch requests (CVE-2023-3390)
* kernel: netfilter: nf_tables: fix chain binding transaction logic in the abort path of NFT_MSG_NEWRULE (CVE-2023-3610)
* kernel: net/sched: cls_fw component can be exploited as result of failure in tcf_change_indev function (CVE-2023-3776)
* kernel: netfilter: use-after-free due to improper element removal in nft_pipapo_remove() (CVE-2023-4004)
* kernel: netfilter: nf_tables_newrule when adding a rule with NFTA_RULE_CHAIN_ID leads to use-after-free (CVE-2023-4147)
* kernel: nf_tables: use-after-free in nft_chain_lookup_byid() (CVE-2023-31248)
* kernel: nf_tables: stack-out-of-bounds-read in nft_byteorder_eval() (CVE-2023-35001)
* kernel: save/restore speculative MSRs during S3 suspend/resume (CVE-2023-1637)
* hw: amd: Cross-Process Information Leak (CVE-2023-20593)
* kernel: bypass of shadow stack protection due to a logic error (CVE-2023-21102)
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 latest RHEL-9.2.z3 Batch (BZ#2228482)
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 9.\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: UAF in nftables when nft_set_lookup_global triggered after handling named and anonymous sets in batch requests (CVE-2023-3390)\n\n* kernel: netfilter: nf_tables: fix chain binding transaction logic in the abort path of NFT_MSG_NEWRULE (CVE-2023-3610)\n\n* kernel: net/sched: cls_fw component can be exploited as result of failure in tcf_change_indev function (CVE-2023-3776)\n\n* kernel: netfilter: use-after-free due to improper element removal in nft_pipapo_remove() (CVE-2023-4004)\n\n* kernel: netfilter: nf_tables_newrule when adding a rule with NFTA_RULE_CHAIN_ID leads to use-after-free (CVE-2023-4147)\n\n* kernel: nf_tables: use-after-free in nft_chain_lookup_byid() (CVE-2023-31248)\n\n* kernel: nf_tables: stack-out-of-bounds-read in nft_byteorder_eval() (CVE-2023-35001)\n\n* kernel: save/restore speculative MSRs during S3 suspend/resume (CVE-2023-1637)\n\n* hw: amd: Cross-Process Information Leak (CVE-2023-20593)\n\n* kernel: bypass of shadow stack protection due to a logic error (CVE-2023-21102)\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 latest RHEL-9.2.z3 Batch (BZ#2228482)", 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-2023:5091", url: "https://access.redhat.com/errata/RHSA-2023:5091", }, { category: "external", summary: "https://access.redhat.com/security/updates/classification/#important", url: "https://access.redhat.com/security/updates/classification/#important", }, { category: "external", summary: "2181891", url: "https://bugzilla.redhat.com/show_bug.cgi?id=2181891", }, { category: "external", summary: "2213260", url: 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Offensive Security team", }, ], cve: "CVE-2023-3390", cwe: { id: "CWE-416", name: "Use After Free", }, discovery_date: "2023-06-06T00:00:00+00:00", ids: [ { system_name: "Red Hat Bugzilla ID", text: "2213260", }, ], notes: [ { category: "description", text: "A use-after-free flaw was found in the Netfilter subsystem of the Linux kernel when processing named and anonymous sets in batch requests, which can lead to performing arbitrary reads and writes in kernel memory. This flaw allows a local user with CAP_NET_ADMIN capability to crash or potentially escalate their privileges on the system.", title: "Vulnerability description", }, { category: "summary", text: "kernel: UAF in nftables when nft_set_lookup_global triggered after handling named and anonymous sets in batch requests", title: "Vulnerability summary", }, { category: "other", text: "Only local users with `CAP_NET_ADMIN` capability or root can trigger this issue. \nOn Red Hat Enterprise Linux, local unprivileged users can exploit unprivileged user namespaces (CONFIG_USER_NS) to grant themselves this capability.\n\nThe OpenShift Container Platform (OCP) control planes or master machines are based on Red Hat Enterprise Linux CoreOS (RHCOS) that consists primarily of RHEL components, therefore, it is also affected by this kernel vulnerability. A successful exploit needs necessary privileges (CAP_NET_ADMIN) and direct, local access. A local user in RHCOS is already a root with full permissions, hence existence of this vulnerability does not bring any value from the potential attacker perspective. From the OpenShift containers perspective, this vulnerability cannot be exploited as in OpenShift the cluster processes on the node are namespaced, which means that switching the namespace in the running OpenShift container will not bring necessary capabilities.\nThis means that for OpenShift, the impact of this vulnerability is Low.\n\nSimilar to the CVE-2023-32233 vulnerability, this has been explained in the following blog post as an example of a \"Container escape vulnerability\":\nhttps://www.redhat.com/en/blog/containers-vulnerability-risk-assessment", 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-9.2.0.Z.MAIN.EUS:kernel-rt-0:5.14.0-284.30.1.rt14.315.el9_2.src", 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This flaw allows a local attacker with CAP_NET_ADMIN access capability to cause a local privilege escalation problem.", title: "Vulnerability description", }, { category: "summary", text: "kernel: netfilter: nf_tables: fix chain binding transaction logic in the abort path of NFT_MSG_NEWRULE", 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-9.2.0.Z.MAIN.EUS:kernel-rt-0:5.14.0-284.30.1.rt14.315.el9_2.src", "NFV-9.2.0.Z.MAIN.EUS:kernel-rt-0:5.14.0-284.30.1.rt14.315.el9_2.x86_64", "NFV-9.2.0.Z.MAIN.EUS:kernel-rt-core-0:5.14.0-284.30.1.rt14.315.el9_2.x86_64", "NFV-9.2.0.Z.MAIN.EUS:kernel-rt-debug-0:5.14.0-284.30.1.rt14.315.el9_2.x86_64", 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in network scheduler sub-component in the Linux Kernel. This issue occurs due to a missing sanity check during cleanup at the time of failure, leading to a misleading reference. This may allow a local attacker to gain local privilege escalation.", title: "Vulnerability description", }, { category: "summary", text: "kernel: net/sched: cls_fw component can be exploited as result of failure in tcf_change_indev function", 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-9.2.0.Z.MAIN.EUS:kernel-rt-0:5.14.0-284.30.1.rt14.315.el9_2.src", "NFV-9.2.0.Z.MAIN.EUS:kernel-rt-0:5.14.0-284.30.1.rt14.315.el9_2.x86_64", "NFV-9.2.0.Z.MAIN.EUS:kernel-rt-core-0:5.14.0-284.30.1.rt14.315.el9_2.x86_64", "NFV-9.2.0.Z.MAIN.EUS:kernel-rt-debug-0:5.14.0-284.30.1.rt14.315.el9_2.x86_64", "NFV-9.2.0.Z.MAIN.EUS:kernel-rt-debug-core-0:5.14.0-284.30.1.rt14.315.el9_2.x86_64", 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This issue could allow a local user to crash the system or potentially escalate their privileges on the system.", title: "Vulnerability description", }, { category: "summary", text: "kernel: netfilter: use-after-free due to improper element removal in nft_pipapo_remove()", 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-9.2.0.Z.MAIN.EUS:kernel-rt-0:5.14.0-284.30.1.rt14.315.el9_2.src", "NFV-9.2.0.Z.MAIN.EUS:kernel-rt-0:5.14.0-284.30.1.rt14.315.el9_2.x86_64", "NFV-9.2.0.Z.MAIN.EUS:kernel-rt-core-0:5.14.0-284.30.1.rt14.315.el9_2.x86_64", "NFV-9.2.0.Z.MAIN.EUS:kernel-rt-debug-0:5.14.0-284.30.1.rt14.315.el9_2.x86_64", "NFV-9.2.0.Z.MAIN.EUS:kernel-rt-debug-core-0:5.14.0-284.30.1.rt14.315.el9_2.x86_64", 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access flaw was found in the Netfilter module in the Linux kernel's nft_byteorder_eval in net/netfilter/nft_byteorder.c. A bound check failure allows a local attacker with CAP_NET_ADMIN access to cause a local privilege escalation issue due to incorrect data alignment.", title: "Vulnerability description", }, { category: "summary", text: "kernel: nf_tables: stack-out-of-bounds-read in nft_byteorder_eval()", title: "Vulnerability summary", }, { category: "other", text: "Exploiting this flaw will require the CAP_NET_ADMIN access privilege in any user or network namespace.", 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-9.2.0.Z.MAIN.EUS:kernel-rt-0:5.14.0-284.30.1.rt14.315.el9_2.src", "NFV-9.2.0.Z.MAIN.EUS:kernel-rt-0:5.14.0-284.30.1.rt14.315.el9_2.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.