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CERTFR-2021-AVI-699
Vulnerability from certfr_avis
De multiples vulnérabilités ont été découvertes dans le noyau Linux d'Ubuntu. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire, un déni de service et une atteinte à l'intégrité 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 16.04 ESM",
"product": {
"name": "Ubuntu",
"vendor": {
"name": "Ubuntu",
"scada": false
}
}
},
{
"description": "Ubuntu 18.04 LTS",
"product": {
"name": "Ubuntu",
"vendor": {
"name": "Ubuntu",
"scada": false
}
}
},
{
"description": "Ubuntu 20.04 LTS",
"product": {
"name": "Ubuntu",
"vendor": {
"name": "Ubuntu",
"scada": false
}
}
},
{
"description": "Ubuntu 14.04 ESM",
"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-2021-3656",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-3656"
},
{
"name": "CVE-2021-33909",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-33909"
},
{
"name": "CVE-2021-22555",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-22555"
},
{
"name": "CVE-2021-3653",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-3653"
}
],
"initial_release_date": "2021-09-14T00:00:00",
"last_revision_date": "2021-09-14T00:00:00",
"links": [],
"reference": "CERTFR-2021-AVI-699",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2021-09-14T00:00:00.000000"
}
],
"risks": [
{
"description": "Atteinte \u00e0 l\u0027int\u00e9grit\u00e9 des donn\u00e9es"
},
{
"description": "Ex\u00e9cution de code arbitraire"
},
{
"description": "D\u00e9ni de service"
},
{
"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. Certaines d\u0027entre elles permettent \u00e0 un attaquant de provoquer\nune ex\u00e9cution de code arbitraire, un d\u00e9ni de service et une atteinte \u00e0\nl\u0027int\u00e9grit\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 LSN-0081-1 du 13 septembre 2021",
"url": "https://ubuntu.com/security/notices/LSN-0081-1"
}
]
}
CVE-2021-3656 (GCVE-0-2021-3656)
Vulnerability from cvelistv5
Published
2022-03-04 18:41
Modified
2024-08-03 17:01
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the "virt_ext" field, this issue could allow a malicious L1 to disable both VMLOAD/VMSAVE intercepts and VLS (Virtual VMLOAD/VMSAVE) for the L2 guest. As a result, the L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape.
References
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|---|---|---|
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CVE-2021-3653 (GCVE-0-2021-3653)
Vulnerability from cvelistv5
Published
2021-09-29 19:41
Modified
2024-08-03 17:01
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the "int_ctl" field, this issue could allow a malicious L1 to enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest. As a result, the L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape. This flaw affects Linux kernel versions prior to 5.14-rc7.
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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CVE-2021-22555 (GCVE-0-2021-22555)
Vulnerability from cvelistv5
Published
2021-07-07 11:20
Modified
2025-10-21 23:25
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-787 - Out-of-bounds Write
Summary
A heap out-of-bounds write affecting Linux since v2.6.19-rc1 was discovered in net/netfilter/x_tables.c. This allows an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name space
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| n/a | Linux Kernel |
Version: 2.6.19-rc1 < unspecified |
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CVE-2021-33909 (GCVE-0-2021-33909)
Vulnerability from cvelistv5
Published
2021-07-20 18:01
Modified
2024-08-04 00:05
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05.
References
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"url": "http://www.openwall.com/lists/oss-security/2021/07/22/7"
},
{
"name": "[oss-security] 20210825 Re: CVE-2021-33909: size_t-to-int vulnerability in Linux\u0027s filesystem layer",
"refsource": "MLIST",
"url": "http://www.openwall.com/lists/oss-security/2021/08/25/10"
},
{
"name": "[oss-security] 20210916 Containers-optimized OS (COS) membership in the linux-distros list",
"refsource": "MLIST",
"url": "http://www.openwall.com/lists/oss-security/2021/09/17/2"
},
{
"name": "[oss-security] 20210917 Re: Containers-optimized OS (COS) membership in the linux-distros list",
"refsource": "MLIST",
"url": "http://www.openwall.com/lists/oss-security/2021/09/17/4"
},
{
"name": "[oss-security] 20210920 Re: Containers-optimized OS (COS) membership in the linux-distros list",
"refsource": "MLIST",
"url": "http://www.openwall.com/lists/oss-security/2021/09/21/1"
},
{
"name": "https://www.oracle.com/security-alerts/cpujan2022.html",
"refsource": "MISC",
"url": "https://www.oracle.com/security-alerts/cpujan2022.html"
},
{
"name": "https://www.openwall.com/lists/oss-security/2021/07/20/1",
"refsource": "MISC",
"url": "https://www.openwall.com/lists/oss-security/2021/07/20/1"
},
{
"name": "https://github.com/torvalds/linux/commit/8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b",
"refsource": "CONFIRM",
"url": "https://github.com/torvalds/linux/commit/8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b"
},
{
"name": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4",
"refsource": "CONFIRM",
"url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4"
},
{
"name": "http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.html",
"refsource": "MISC",
"url": "http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.html"
},
{
"name": "http://packetstormsecurity.com/files/163671/Kernel-Live-Patch-Security-Notice-LSN-0079-1.html",
"refsource": "MISC",
"url": "http://packetstormsecurity.com/files/163671/Kernel-Live-Patch-Security-Notice-LSN-0079-1.html"
},
{
"name": "https://security.netapp.com/advisory/ntap-20210819-0004/",
"refsource": "CONFIRM",
"url": "https://security.netapp.com/advisory/ntap-20210819-0004/"
},
{
"name": "http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html",
"refsource": "MISC",
"url": "http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html"
},
{
"name": "http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html",
"refsource": "MISC",
"url": "http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html"
},
{
"name": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015",
"refsource": "CONFIRM",
"url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2021-33909",
"datePublished": "2021-07-20T18:01:34",
"dateReserved": "2021-06-07T00:00:00",
"dateUpdated": "2024-08-04T00:05:52.143Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
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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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