rhsa-2023_4961
Vulnerability from csaf_redhat
Published
2023-09-05 09:02
Modified
2024-11-06 03:37
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 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Telecommunications Update Service, and Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions.
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 vulnerability in the Linux Kernel traffic control index filter (CVE-2023-1829)
* kernel: ipvlan: out-of-bounds write caused by unclear skb->cb (CVE-2023-3090)
* kernel: UAF in nftables when nft_set_lookup_global triggered after handling named and anonymous sets in batch requests (CVE-2023-3390)
* kernel: netfilter: use-after-free due to improper element removal in nft_pipapo_remove() (CVE-2023-4004)
* kernel: nf_tables: stack-out-of-bounds-read in nft_byteorder_eval() (CVE-2023-35001)
* kernel: cls_flower: out-of-bounds write in fl_set_geneve_opt() (CVE-2023-35788)
* Kernel: bluetooth: Unauthorized management command execution (CVE-2023-2002)
* kernel: OOB access in the Linux kernel's XFS subsystem (CVE-2023-2124)
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-8.4.z19 source tree (BZ#2222004)
* pods get restarted due to failed probes (BZ#2227240)
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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{
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"title": "Kernel: bluetooth: Unauthorized management command execution"
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{
"cve": "CVE-2023-2124",
"cwe": {
"id": "CWE-125",
"name": "Out-of-bounds Read"
},
"discovery_date": "2023-04-17T00:00:00+00:00",
"ids": [
{
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}
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{
"category": "description",
"text": "An out-of-bounds memory access flaw was found in the Linux kernel\u2019s XFS file system in how a user restores an XFS image after failure (with a dirty log journal). This flaw allows a local user to crash or potentially escalate their privileges on the system.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: OOB access in the Linux kernel\u0027s XFS subsystem",
"title": "Vulnerability summary"
},
{
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"text": "This vulnerability is rated as having a Moderate impact. While theoretically it could lead to privilege escalation, the only known impact is a denial of service.",
"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.",
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{
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{
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"text": "A flaw was found in the IPVLAN network driver in the Linux kernel. This issue is caused by missing skb-\u003ecb initialization in `__ip_options_echo` and can lead to an out-of-bounds write stack overflow. This may allow a local user to cause a denial of service or potentially achieve local privilege escalation.",
"title": "Vulnerability description"
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{
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"text": "kernel: ipvlan: out-of-bounds write caused by unclear skb-\u003ecb",
"title": "Vulnerability summary"
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{
"category": "other",
"text": "Red Hat Enterprise Linux 6 and 7 are not affected by this flaw as they did not include IPVLAN support.",
"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.",
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"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.",
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"text": "kernel: UAF in nftables when nft_set_lookup_global triggered after handling named and anonymous sets in batch requests",
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"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",
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"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.",
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{
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"summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-3390",
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"date": "2023-09-05T09:02:08+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.",
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"title": "kernel: UAF in nftables when nft_set_lookup_global triggered after handling named and anonymous sets in batch requests"
},
{
"cve": "CVE-2023-4004",
"cwe": {
"id": "CWE-416",
"name": "Use After Free"
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"ids": [
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{
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"text": "A use-after-free flaw was found in the Linux kernel\u0027s netfilter in the way a user triggers the nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. This issue could allow a local user to crash the system or potentially escalate their privileges on the system.",
"title": "Vulnerability description"
},
{
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"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\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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{
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},
{
"category": "external",
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"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2225275"
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{
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"summary": "https://www.cve.org/CVERecord?id=CVE-2023-4004",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-4004"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-4004",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4004"
},
{
"category": "external",
"summary": "https://patchwork.ozlabs.org/project/netfilter-devel/patch/20230719190824.21196-1-fw@strlen.de/",
"url": "https://patchwork.ozlabs.org/project/netfilter-devel/patch/20230719190824.21196-1-fw@strlen.de/"
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{
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{
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"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: nf_tables: stack-out-of-bounds-read in nft_byteorder_eval()",
"title": "Vulnerability summary"
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{
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"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"
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{
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{
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"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.",
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"details": "This flaw can be mitigated by preventing the affected `cls_flower` kernel module from being loaded. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278.",
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"title": "kernel: cls_flower: out-of-bounds write in fl_set_geneve_opt()"
}
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}
Loading...
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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.