rhsa-2024_1746
Vulnerability from csaf_redhat
Published
2024-04-10 08:09
Modified
2024-09-13 21:20
Summary
Red Hat Security Advisory: kernel security update
Notes
Topic
An update for kernel is now available for Red Hat Enterprise Linux 7.7 Advanced Update 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 l2cap_connect and l2cap_le_connect_req in net/bluetooth/l2cap_core.c (CVE-2022-42896)
* kernel: net/sched: sch_hfsc UAF (CVE-2023-4623)
* Kernel: bluetooth: Unauthorized management command execution (CVE-2023-2002)
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.
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"text": "A use-after-free flaw was found in the Linux kernel\u0027s implementation of logical link control and adaptation protocol (L2CAP), part of the Bluetooth stack in the l2cap_connect and l2cap_le_connect_req functions. An attacker with physical access within the range of standard Bluetooth transmission could execute code leaking kernel memory via Bluetooth if within proximity of the victim.",
"title": "Vulnerability description"
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"text": "kernel: use-after-free in l2cap_connect and l2cap_le_connect_req in net/bluetooth/l2cap_core.c",
"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"
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"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2022-42896",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-42896"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2022-42896",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-42896"
},
{
"category": "external",
"summary": "https://github.com/google/security-research/security/advisories/GHSA-pf87-6c9q-jvm4",
"url": "https://github.com/google/security-research/security/advisories/GHSA-pf87-6c9q-jvm4"
}
],
"release_date": "2022-11-03T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"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: use-after-free in l2cap_connect and l2cap_le_connect_req in net/bluetooth/l2cap_core.c"
},
{
"cve": "CVE-2023-2002",
"cwe": {
"id": "CWE-250",
"name": "Execution with Unnecessary Privileges"
},
"discovery_date": "2023-04-17T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2187308"
}
],
"notes": [
{
"category": "description",
"text": "A vulnerability was found in the HCI sockets implementation due to a missing capability check in net/bluetooth/hci_sock.c in the Linux Kernel. This flaw allows an attacker to unauthorized execution of management commands, compromising the confidentiality, integrity, and availability of Bluetooth communication.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "Kernel: bluetooth: Unauthorized management command execution",
"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"
}
],
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{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2023-2002"
},
{
"category": "external",
"summary": "RHBZ#2187308",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2187308"
},
{
"category": "external",
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"url": "https://www.cve.org/CVERecord?id=CVE-2023-2002"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-2002",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-2002"
},
{
"category": "external",
"summary": "https://www.openwall.com/lists/oss-security/2023/04/16/3",
"url": "https://www.openwall.com/lists/oss-security/2023/04/16/3"
}
],
"release_date": "2023-04-16T12:30:00+00:00",
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{
"category": "vendor_fix",
"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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"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H",
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"title": "Kernel: bluetooth: Unauthorized management command execution"
},
{
"cve": "CVE-2023-4623",
"cwe": {
"id": "CWE-416",
"name": "Use After Free"
},
"discovery_date": "2023-09-06T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2237757"
}
],
"notes": [
{
"category": "description",
"text": "A use-after-free flaw was found in the Linux kernel\u0027s net/sched: sch_hfsc (HFSC qdisc traffic control) component that can be exploited to achieve local privilege escalation. If a class with a link-sharing curve, for example, with the HFSC_FSC flag set, has a parent without a link-sharing curve, then init_vf() will call vttree_insert() on the parent, but vttree_remove() will be skipped in update_vf(). This leaves a dangling pointer that can cause a use-after-free issue.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: net/sched: sch_hfsc UAF",
"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"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2023-4623"
},
{
"category": "external",
"summary": "RHBZ#2237757",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2237757"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2023-4623",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-4623"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-4623",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4623"
},
{
"category": "external",
"summary": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b3d26c5702c7d6c45456326e56d2ccf3f103e60f",
"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b3d26c5702c7d6c45456326e56d2ccf3f103e60f"
}
],
"release_date": "2023-09-06T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"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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"restart_required": {
"category": "machine"
},
"url": "https://access.redhat.com/errata/RHSA-2024:1746"
},
{
"category": "workaround",
"details": "To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. \n~~~\nhttps://access.redhat.com/solutions/41278 \n~~~",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: net/sched: sch_hfsc UAF"
}
]
}
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