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CERTFR-2018-AVI-581
Vulnerability from certfr_avis
De multiples vulnérabilités ont été découvertes dans le noyau Linux d'Ubuntu. Elles permettent à un attaquant de provoquer un contournement de la politique de sécurité 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",
"product": {
"name": "Ubuntu",
"vendor": {
"name": "Ubuntu",
"scada": false
}
}
},
{
"description": "Ubuntu 18.10",
"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-2018-18955",
"url": "https://www.cve.org/CVERecord?id=CVE-2018-18955"
},
{
"name": "CVE-2018-6559",
"url": "https://www.cve.org/CVERecord?id=CVE-2018-6559"
},
{
"name": "CVE-2018-18653",
"url": "https://www.cve.org/CVERecord?id=CVE-2018-18653"
},
{
"name": "CVE-2018-18281",
"url": "https://www.cve.org/CVERecord?id=CVE-2018-18281"
},
{
"name": "CVE-2018-17972",
"url": "https://www.cve.org/CVERecord?id=CVE-2018-17972"
},
{
"name": "CVE-2018-18445",
"url": "https://www.cve.org/CVERecord?id=CVE-2018-18445"
}
],
"initial_release_date": "2018-12-03T00:00:00",
"last_revision_date": "2018-12-03T00:00:00",
"links": [],
"reference": "CERTFR-2018-AVI-581",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2018-12-03T00:00:00.000000"
}
],
"risks": [
{
"description": "Ex\u00e9cution de code arbitraire"
},
{
"description": "D\u00e9ni de service"
},
{
"description": "Contournement de la politique de s\u00e9curit\u00e9"
},
{
"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 un contournement\nde la politique de s\u00e9curit\u00e9 et une atteinte \u00e0 la confidentialit\u00e9 des\ndonn\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-3833-1 du 30 novembre 2018",
"url": "https://usn.ubuntu.com/3833-1/"
},
{
"published_at": null,
"title": "Bulletin de s\u00e9curit\u00e9 Ubuntu USN-3832-1 du 30 novembre 2018",
"url": "https://usn.ubuntu.com/3832-1/"
}
]
}
CVE-2018-17972 (GCVE-0-2018-17972)
Vulnerability from cvelistv5
Published
2018-10-03 22:00
Modified
2024-08-05 11:01
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
An issue was discovered in the proc_pid_stack function in fs/proc/base.c in the Linux kernel through 4.18.11. It does not ensure that only root may inspect the kernel stack of an arbitrary task, allowing a local attacker to exploit racy stack unwinding and leak kernel task stack contents.
References
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CVE-2018-18445 (GCVE-0-2018-18445)
Vulnerability from cvelistv5
Published
2018-10-17 19:00
Modified
2024-08-05 11:08
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
In the Linux kernel 4.14.x, 4.15.x, 4.16.x, 4.17.x, and 4.18.x before 4.18.13, faulty computation of numeric bounds in the BPF verifier permits out-of-bounds memory accesses because adjust_scalar_min_max_vals in kernel/bpf/verifier.c mishandles 32-bit right shifts.
References
| URL | Tags | ||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||||||||||||||
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CVE-2018-18955 (GCVE-0-2018-18955)
Vulnerability from cvelistv5
Published
2018-11-16 20:00
Modified
2024-08-05 11:23
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
In the Linux kernel 4.15.x through 4.19.x before 4.19.2, map_write() in kernel/user_namespace.c allows privilege escalation because it mishandles nested user namespaces with more than 5 UID or GID ranges. A user who has CAP_SYS_ADMIN in an affected user namespace can bypass access controls on resources outside the namespace, as demonstrated by reading /etc/shadow. This occurs because an ID transformation takes place properly for the namespaced-to-kernel direction but not for the kernel-to-namespaced direction.
References
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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CVE-2018-18281 (GCVE-0-2018-18281)
Vulnerability from cvelistv5
Published
2018-10-30 18:00
Modified
2024-08-05 11:08
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. This is fixed in the following kernel versions: 4.9.135, 4.14.78, 4.18.16, 4.19.
References
| URL | Tags | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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CVE-2018-18653 (GCVE-0-2018-18653)
Vulnerability from cvelistv5
Published
2018-10-26 00:00
Modified
2024-08-05 11:16
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
The Linux kernel, as used in Ubuntu 18.10 and when booted with UEFI Secure Boot enabled, allows privileged local users to bypass intended Secure Boot restrictions and execute untrusted code by loading arbitrary kernel modules. This occurs because a modified kernel/module.c, in conjunction with certain configuration options, leads to mishandling of the result of signature verification.
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CVE-2018-6559 (GCVE-0-2018-6559)
Vulnerability from cvelistv5
Published
2018-10-26 17:00
Modified
2024-09-16 19:19
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-200 - Information Exposure
Summary
The Linux kernel, as used in Ubuntu 18.04 LTS and Ubuntu 18.10, allows local users to obtain names of files in which they would not normally be able to access via an overlayfs mount inside of a user namespace.
References
| URL | Tags | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Canonical Ltd. | Linux kernel, as used in Ubuntu 18.04 LTS and Ubuntu 18.10 |
Version: 4.15.0-38.41 Version: 4.18.0-10.11 |
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- 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.
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