rhsa-2021_3523
Vulnerability from csaf_redhat
Published
2021-09-14 08:54
Modified
2024-11-05 23:56
Summary
Red Hat Security Advisory: kpatch-patch security update
Notes
Topic
An update is now available for Red Hat Enterprise Linux 7.7 Extended 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
This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify the code of a running kernel.
Security Fix(es):
* kernel: Use after free via PI futex state (CVE-2021-3347)
* kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c (CVE-2021-22555)
* kernel: race condition for removal of the HCI controller (CVE-2021-32399)
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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"title": "kernel: Use after free via PI futex state"
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{
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"cwe": {
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"name": "Out-of-bounds Write"
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{
"category": "description",
"text": "A flaw was discovered in processing setsockopt IPT_SO_SET_REPLACE (or IP6T_SO_SET_REPLACE) for 32 bit processes on 64 bit systems. This flaw will allow local user to gain privileges or cause a DoS through user name space. This action is usually restricted to root-privileged users but can also be leveraged if the kernel is compiled with CONFIG_USER_NS and CONFIG_NET_NS and the user is granted elevated privileges.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "For the Red Hat Enterprise Linux 7 only privileged user can trigger this bug.\nFor the Red Hat Enterprise Linux 8 regular user can trigger it, and the result is corruption of 4 bytes of memory.",
"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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"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2021-22555"
},
{
"category": "external",
"summary": "RHBZ#1980101",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1980101"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2021-22555",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-22555"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2021-22555",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-22555"
},
{
"category": "external",
"summary": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=b29c457a6511435960115c0f548c4360d5f4801d",
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{
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"summary": "https://github.com/google/security-research/security/advisories/GHSA-xxx5-8mvq-3528",
"url": "https://github.com/google/security-research/security/advisories/GHSA-xxx5-8mvq-3528"
}
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{
"category": "vendor_fix",
"date": "2021-09-14T08:54:45+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",
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},
{
"category": "workaround",
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"attackVector": "LOCAL",
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"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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{
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"details": "Important"
}
],
"title": "kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c"
},
{
"cve": "CVE-2021-32399",
"cwe": {
"id": "CWE-362",
"name": "Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)"
},
"discovery_date": "2021-05-11T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "1970807"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u2019s handling of the removal of Bluetooth HCI controllers. This flaw allows an attacker with a local account to exploit a race condition, leading to corrupted memory and 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: race condition for removal of the HCI controller",
"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-2021-32399"
},
{
"category": "external",
"summary": "RHBZ#1970807",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1970807"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2021-32399",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-32399"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2021-32399",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-32399"
}
],
"release_date": "2021-05-11T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2021-09-14T08:54:45+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",
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"url": "https://access.redhat.com/errata/RHSA-2021:3523"
},
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"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/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: race condition for removal of the HCI controller"
}
]
}
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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.