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CERTFR-2021-AVI-748
Vulnerability from certfr_avis - Published: - Updated:
De multiples vulnérabilités ont été découvertes dans le noyau Linux d'Ubuntu. Elles permettent à un attaquant de provoquer une exécution de code arbitraire, un déni de service à distance et une atteinte à la confidentialité des données.
Solution
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
NoneImpacted products
References
| Title | Publication Time | Tags | ||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Ubuntu 18.04 LTS pour Raspberry Pi",
"product": {
"name": "Ubuntu",
"vendor": {
"name": "Ubuntu",
"scada": false
}
}
},
{
"description": "Ubuntu 20.04 LTS pour Raspberry Pi",
"product": {
"name": "Ubuntu",
"vendor": {
"name": "Ubuntu",
"scada": false
}
}
}
],
"affected_systems_content": null,
"content": "## Solution\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des\ncorrectifs (cf. section Documentation).\n",
"cves": [
{
"name": "CVE-2021-38205",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-38205"
},
{
"name": "CVE-2021-3679",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-3679"
},
{
"name": "CVE-2021-38204",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-38204"
},
{
"name": "CVE-2021-38160",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-38160"
},
{
"name": "CVE-2021-38199",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-38199"
},
{
"name": "CVE-2021-22543",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-22543"
},
{
"name": "CVE-2021-33624",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-33624"
},
{
"name": "CVE-2021-3732",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-3732"
}
],
"links": [],
"reference": "CERTFR-2021-AVI-748",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2021-10-04T00:00:00.000000"
}
],
"risks": [
{
"description": "D\u00e9ni de service \u00e0 distance"
},
{
"description": "Ex\u00e9cution de code arbitraire"
},
{
"description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans le noyau Linux\nd\u0027Ubuntu. Elles permettent \u00e0 un attaquant de provoquer une ex\u00e9cution de\ncode arbitraire, un d\u00e9ni de service \u00e0 distance et une atteinte \u00e0 la\nconfidentialit\u00e9 des donn\u00e9es.\n",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans le noyau Linux d\u0027Ubuntu",
"vendor_advisories": [
{
"published_at": null,
"title": "Bulletin de s\u00e9curit\u00e9 Ubuntu USN-5094-2 du 30 septembre 2021",
"url": "https://ubuntu.com/security/notices/USN-5094-2"
},
{
"published_at": null,
"title": "Bulletin de s\u00e9curit\u00e9 Ubuntu USN-5091-2 du 30 septembre 2021",
"url": "https://ubuntu.com/security/notices/USN-5091-2"
}
]
}
CVE-2021-38205 (GCVE-0-2021-38205)
Vulnerability from cvelistv5 – Published: 2021-08-08 19:23 – Updated: 2024-08-04 01:37
VLAI?
EPSS
Summary
drivers/net/ethernet/xilinx/xilinx_emaclite.c in the Linux kernel before 5.13.3 makes it easier for attackers to defeat an ASLR protection mechanism because it prints a kernel pointer (i.e., the real IOMEM pointer).
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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CVE-2021-33624 (GCVE-0-2021-33624)
Vulnerability from cvelistv5 – Published: 2021-06-23 15:37 – Updated: 2025-11-11 15:19
VLAI?
EPSS
Summary
In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
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CVE-2021-38199 (GCVE-0-2021-38199)
Vulnerability from cvelistv5 – Published: 2021-08-08 19:27 – Updated: 2024-08-04 01:37
VLAI?
EPSS
Summary
fs/nfs/nfs4client.c in the Linux kernel before 5.13.4 has incorrect connection-setup ordering, which allows operators of remote NFSv4 servers to cause a denial of service (hanging of mounts) by arranging for those servers to be unreachable during trunking detection.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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CVE-2021-3679 (GCVE-0-2021-3679)
Vulnerability from cvelistv5 – Published: 2021-08-05 19:54 – Updated: 2024-08-03 17:01
VLAI?
EPSS
Summary
A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was found in the way user uses trace ring buffer in a specific way. Only privileged local users (with CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.
Severity ?
No CVSS data available.
CWE
Assigner
References
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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CVE-2021-3732 (GCVE-0-2021-3732)
Vulnerability from cvelistv5 – Published: 2022-03-07 13:56 – Updated: 2024-08-03 17:01
VLAI?
EPSS
Summary
A flaw was found in the Linux kernel's OverlayFS subsystem in the way the user mounts the TmpFS filesystem with OverlayFS. This flaw allows a local user to gain access to hidden files that should not be accessible.
Severity ?
No CVSS data available.
CWE
- CWE-200 - - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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CVE-2021-38160 (GCVE-0-2021-38160)
Vulnerability from cvelistv5 – Published: 2021-08-07 03:31 – Updated: 2024-08-04 01:37
VLAI?
EPSS
Summary
In drivers/char/virtio_console.c in the Linux kernel before 5.13.4, data corruption or loss can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size. NOTE: the vendor indicates that the cited data corruption is not a vulnerability in any existing use case; the length validation was added solely for robustness in the face of anomalous host OS behavior
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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CVE-2021-38204 (GCVE-0-2021-38204)
Vulnerability from cvelistv5 – Published: 2021-08-08 19:25 – Updated: 2024-08-04 01:37
VLAI?
EPSS
Summary
drivers/usb/host/max3421-hcd.c in the Linux kernel before 5.13.6 allows physically proximate attackers to cause a denial of service (use-after-free and panic) by removing a MAX-3421 USB device in certain situations.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
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CVE-2021-22543 (GCVE-0-2021-22543)
Vulnerability from cvelistv5 – Published: 2021-05-26 10:30 – Updated: 2024-09-16 23:26
VLAI?
EPSS
Summary
An issue was discovered in Linux: KVM through Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks and can lead to pages being freed while still accessible by the VMM and guest. This allows users with the ability to start and control a VM to read/write random pages of memory and can result in local privilege escalation.
Severity ?
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
| URL | Tags | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux Kernel | Linux Kernel |
Affected:
add6a0cd1c5ba51b201e1361b05a5df817083618 , < f8be156be163a052a067306417cd0ff679068c97
(git)
|
Credits
David Stevens
Kevin Hamacher
Jann Horn
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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