rhsa-2020_4279
Vulnerability from csaf_redhat
Published
2020-10-19 17:02
Modified
2024-11-05 22:50
Summary
Red Hat Security Advisory: kernel-alt security update
Notes
Topic
An update for kernel-alt is now available for Red Hat Enterprise Linux 7.
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-alt packages provide the Linux kernel version 4.x.
Security Fix(es):
* kernel: net: bluetooth: type confusion while processing AMP packets (CVE-2020-12351)
* kernel: net: bluetooth: information leak when processing certain AMP packets (CVE-2020-12352)
* kernel: information exposure in drivers/char/random.c and kernel/time/timer.c (CVE-2020-16166)
* kernel: TOCTOU mismatch in the NFS client code (CVE-2020-25212)
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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"acknowledgments": [
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"names": [
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"organization": "Google"
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"names": [
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"cve": "CVE-2020-12351",
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"id": "CWE-843",
"name": "Access of Resource Using Incompatible Type (\u0027Type Confusion\u0027)"
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"text": "1886521"
}
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{
"category": "description",
"text": "A flaw was found in the way the Linux kernel\u2019s Bluetooth implementation handled L2CAP (Logical Link Control and Adaptation Protocol) packets with A2MP (Alternate MAC-PHY Manager Protocol) CID (Channel Identifier). This flaw allows a remote attacker in an adjacent range to crash the system, causing a denial of service or potentially executing arbitrary code on the system by sending a specially crafted L2CAP packet. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: net: bluetooth: type confusion while processing AMP packets",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Red Hat Enterprise Linux 7 is affected starting with the Red Hat Enterprise Linux 7.4 GA kernel version 3.10.0-693 onward.\n\nFor Red Hat OpenShift Container Platform, while the cluster nodes may be running an underlying kernel that\u0027s affected by this flaw present, both virtual and physical hosts in a production environment will generally have the mitigation already in place of having Bluetooth hardware either not present, or not enabled.",
"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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{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2020-12351"
},
{
"category": "external",
"summary": "RHBZ#1886521",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1886521"
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{
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{
"category": "external",
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"url": "https://www.cve.org/CVERecord?id=CVE-2020-12351"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-12351",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-12351"
},
{
"category": "external",
"summary": "https://github.com/google/security-research/security/advisories/GHSA-7mh3-gq28-gfrq",
"url": "https://github.com/google/security-research/security/advisories/GHSA-7mh3-gq28-gfrq"
},
{
"category": "external",
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"url": "https://github.com/google/security-research/security/advisories/GHSA-h637-c88j-47wq"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-1-luiz.dentz@gmail.com/",
"url": "https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-1-luiz.dentz@gmail.com/"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-2-luiz.dentz@gmail.com/",
"url": "https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-2-luiz.dentz@gmail.com/"
},
{
"category": "external",
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"url": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00435.html"
},
{
"category": "external",
"summary": "https://www.zdnet.com/article/google-warns-of-severe-bleedingtooth-bluetooth-flaw-in-linux-kernel/",
"url": "https://www.zdnet.com/article/google-warns-of-severe-bleedingtooth-bluetooth-flaw-in-linux-kernel/"
}
],
"release_date": "2020-10-14T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2020-10-19T17:02:38+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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"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
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{
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"details": "Important"
}
],
"title": "kernel: net: bluetooth: type confusion while processing AMP packets"
},
{
"acknowledgments": [
{
"names": [
"Andy Nguyen"
],
"organization": "Google"
},
{
"names": [
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]
}
],
"cve": "CVE-2020-12352",
"cwe": {
"id": "CWE-201",
"name": "Insertion of Sensitive Information Into Sent Data"
},
"discovery_date": "2020-10-07T00:00:00+00:00",
"flags": [
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"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "1886529"
}
],
"notes": [
{
"category": "description",
"text": "An information leak flaw was found in the way Linux kernel\u2019s Bluetooth stack implementation handled initialization of stack memory when handling certain AMP (Alternate MAC-PHY Manager Protocol) packets. This flaw allows a remote attacker in an adjacent range to leak small portions of stack memory on the system by sending specially crafted AMP packets. The highest threat from this vulnerability is to data confidentiality.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: net: bluetooth: information leak when processing certain AMP packets",
"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-2020-12352"
},
{
"category": "external",
"summary": "RHBZ#1886529",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1886529"
},
{
"category": "external",
"summary": "RHSB-BleedingTooth",
"url": "https://access.redhat.com/security/vulnerabilities/BleedingTooth"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2020-12352",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-12352"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-12352",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-12352"
},
{
"category": "external",
"summary": "https://github.com/google/security-research/security/advisories/GHSA-7mh3-gq28-gfrq",
"url": "https://github.com/google/security-research/security/advisories/GHSA-7mh3-gq28-gfrq"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-1-luiz.dentz@gmail.com/",
"url": "https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-1-luiz.dentz@gmail.com/"
},
{
"category": "external",
"summary": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00435.html",
"url": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00435.html"
}
],
"release_date": "2020-10-14T00:00:00+00:00",
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{
"category": "vendor_fix",
"date": "2020-10-19T17:02:38+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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},
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"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
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"vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
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"title": "kernel: net: bluetooth: information leak when processing certain AMP packets"
},
{
"cve": "CVE-2020-16166",
"cwe": {
"id": "CWE-200",
"name": "Exposure of Sensitive Information to an Unauthorized Actor"
},
"discovery_date": "2020-07-31T00:00:00+00:00",
"flags": [
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"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "1865751"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel. The generation of the device ID from the network RNG internal state is predictable. The highest threat from this vulnerability is to data confidentiality.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: information exposure in drivers/char/random.c and kernel/time/timer.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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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2020-16166"
},
{
"category": "external",
"summary": "RHBZ#1865751",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1865751"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2020-16166",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-16166"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-16166",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-16166"
}
],
"release_date": "2020-07-29T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2020-10-19T17:02:38+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: information exposure in drivers/char/random.c and kernel/time/timer.c"
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{
"cve": "CVE-2020-25212",
"cwe": {
"id": "CWE-367",
"name": "Time-of-check Time-of-use (TOCTOU) Race Condition"
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"discovery_date": "2020-09-09T00:00:00+00:00",
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"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "1877575"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the NFSv4 implementation where when mounting a remote attacker controlled server it could return specially crafted response allow for local memory corruption and possibly privilege escalation.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: TOCTOU mismatch in the NFS client code",
"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-2020-25212"
},
{
"category": "external",
"summary": "RHBZ#1877575",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1877575"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2020-25212",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-25212"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-25212",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-25212"
}
],
"release_date": "2020-09-09T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2020-10-19T17:02:38+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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"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2020:4279"
},
{
"category": "workaround",
"details": "While there is no known mitigation to this flaw, configuring authentication and only mounting authenticated NFSv4 servers will significantly reduce the risk of this flaw being successfully exploited.",
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{
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"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"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": "Moderate"
}
],
"title": "kernel: TOCTOU mismatch in the NFS client code"
}
]
}
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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.