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CERTFR-2022-AVI-343
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 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).
NoneReferences
| Title | Publication Time | Tags | |||
|---|---|---|---|---|---|
|
|||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Ubuntu 20.04 LTS",
"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-2021-45095",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-45095"
},
{
"name": "CVE-2022-27666",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-27666"
},
{
"name": "CVE-2021-28711",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-28711"
},
{
"name": "CVE-2021-4135",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-4135"
},
{
"name": "CVE-2021-28713",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-28713"
},
{
"name": "CVE-2021-44733",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-44733"
},
{
"name": "CVE-2021-28712",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-28712"
},
{
"name": "CVE-2021-45480",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-45480"
},
{
"name": "CVE-2021-43976",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-43976"
},
{
"name": "CVE-2021-45469",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-45469"
},
{
"name": "CVE-2022-0492",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-0492"
},
{
"name": "CVE-2022-1055",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-1055"
},
{
"name": "CVE-2022-0435",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-0435"
},
{
"name": "CVE-2021-28714",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-28714"
},
{
"name": "CVE-2021-28715",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-28715"
}
],
"initial_release_date": "2022-04-14T00:00:00",
"last_revision_date": "2022-04-14T00:00:00",
"links": [],
"reference": "CERTFR-2022-AVI-343",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2022-04-14T00:00:00.000000"
}
],
"risks": [
{
"description": "D\u00e9ni de service \u00e0 distance"
},
{
"description": "Ex\u00e9cution de code arbitraire"
},
{
"description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
},
{
"description": "\u00c9l\u00e9vation de privil\u00e8ges"
}
],
"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 \u00e0 distance et une\natteinte \u00e0 la confidentialit\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-5377-1 du 13 avril 2022",
"url": "https://ubuntu.com/security/notices/USN-5377-1"
}
]
}
CVE-2021-28713 (GCVE-0-2021-28713)
Vulnerability from cvelistv5
Published
2022-01-05 16:10
Modified
2024-08-03 21:55
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- unknown
Summary
Rogue backends can cause DoS of guests via high frequency events T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen offers the ability to run PV backends in regular unprivileged guests, typically referred to as "driver domains". Running PV backends in driver domains has one primary security advantage: if a driver domain gets compromised, it doesn't have the privileges to take over the system. However, a malicious driver domain could try to attack other guests via sending events at a high frequency leading to a Denial of Service in the guest due to trying to service interrupts for elongated amounts of time. There are three affected backends: * blkfront patch 1, CVE-2021-28711 * netfront patch 2, CVE-2021-28712 * hvc_xen (console) patch 3, CVE-2021-28713
References
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CVE-2021-45095 (GCVE-0-2021-45095)
Vulnerability from cvelistv5
Published
2021-12-16 03:37
Modified
2024-08-04 04:32
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
pep_sock_accept in net/phonet/pep.c in the Linux kernel through 5.15.8 has a refcount leak.
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
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CVE-2021-4135 (GCVE-0-2021-4135)
Vulnerability from cvelistv5
Published
2022-07-14 19:30
Modified
2024-08-03 17:16
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
A memory leak vulnerability was found in the Linux kernel's eBPF for the Simulated networking device driver in the way user uses BPF for the device such that function nsim_map_alloc_elem being called. A local user could use this flaw to get unauthorized access to some data.
References
| URL | Tags | |
|---|---|---|
Impacted products
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CVE-2022-1055 (GCVE-0-2022-1055)
Vulnerability from cvelistv5
Published
2022-03-29 15:05
Modified
2024-08-02 23:47
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-416 - Use After Free
Summary
A use-after-free exists in the Linux Kernel in tc_new_tfilter that could allow a local attacker to gain privilege escalation. The exploit requires unprivileged user namespaces. We recommend upgrading past commit 04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5
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CVE-2022-0435 (GCVE-0-2022-0435)
Vulnerability from cvelistv5
Published
2022-03-25 00:00
Modified
2024-08-02 23:25
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
A stack overflow flaw was found in the Linux kernel's TIPC protocol functionality in the way a user sends a packet with malicious content where the number of domain member nodes is higher than the 64 allowed. This flaw allows a remote user to crash the system or possibly escalate their privileges if they have access to the TIPC network.
References
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CVE-2022-0492 (GCVE-0-2022-0492)
Vulnerability from cvelistv5
Published
2022-03-03 00:00
Modified
2024-08-02 23:32
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
A vulnerability was found in the Linux kernel’s cgroup_release_agent_write in the kernel/cgroup/cgroup-v1.c function. This flaw, under certain circumstances, allows the use of the cgroups v1 release_agent feature to escalate privileges and bypass the namespace isolation unexpectedly.
References
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CVE-2021-44733 (GCVE-0-2021-44733)
Vulnerability from cvelistv5
Published
2021-12-22 00:00
Modified
2024-08-04 04:32
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
A use-after-free exists in drivers/tee/tee_shm.c in the TEE subsystem in the Linux kernel through 5.15.11. This occurs because of a race condition in tee_shm_get_from_id during an attempt to free a shared memory object.
References
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CVE-2021-28712 (GCVE-0-2021-28712)
Vulnerability from cvelistv5
Published
2022-01-05 16:10
Modified
2024-08-03 21:55
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- unknown
Summary
Rogue backends can cause DoS of guests via high frequency events T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen offers the ability to run PV backends in regular unprivileged guests, typically referred to as "driver domains". Running PV backends in driver domains has one primary security advantage: if a driver domain gets compromised, it doesn't have the privileges to take over the system. However, a malicious driver domain could try to attack other guests via sending events at a high frequency leading to a Denial of Service in the guest due to trying to service interrupts for elongated amounts of time. There are three affected backends: * blkfront patch 1, CVE-2021-28711 * netfront patch 2, CVE-2021-28712 * hvc_xen (console) patch 3, CVE-2021-28713
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CVE-2021-45480 (GCVE-0-2021-45480)
Vulnerability from cvelistv5
Published
2021-12-24 22:55
Modified
2024-08-04 04:39
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
An issue was discovered in the Linux kernel before 5.15.11. There is a memory leak in the __rds_conn_create() function in net/rds/connection.c in a certain combination of circumstances.
References
| URL | Tags | ||||||||||||||||
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CVE-2021-43976 (GCVE-0-2021-43976)
Vulnerability from cvelistv5
Published
2021-11-17 00:00
Modified
2024-08-04 04:10
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
In the Linux kernel through 5.15.2, mwifiex_usb_recv in drivers/net/wireless/marvell/mwifiex/usb.c allows an attacker (who can connect a crafted USB device) to cause a denial of service (skb_over_panic).
References
| URL | Tags | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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CVE-2021-28711 (GCVE-0-2021-28711)
Vulnerability from cvelistv5
Published
2022-01-05 16:10
Modified
2024-08-03 21:47
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- unknown
Summary
Rogue backends can cause DoS of guests via high frequency events T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen offers the ability to run PV backends in regular unprivileged guests, typically referred to as "driver domains". Running PV backends in driver domains has one primary security advantage: if a driver domain gets compromised, it doesn't have the privileges to take over the system. However, a malicious driver domain could try to attack other guests via sending events at a high frequency leading to a Denial of Service in the guest due to trying to service interrupts for elongated amounts of time. There are three affected backends: * blkfront patch 1, CVE-2021-28711 * netfront patch 2, CVE-2021-28712 * hvc_xen (console) patch 3, CVE-2021-28713
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CVE-2021-28714 (GCVE-0-2021-28714)
Vulnerability from cvelistv5
Published
2022-01-06 17:06
Modified
2024-08-03 21:55
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- unknown
Summary
Guest can force Linux netback driver to hog large amounts of kernel memory T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Incoming data packets for a guest in the Linux kernel's netback driver are buffered until the guest is ready to process them. There are some measures taken for avoiding to pile up too much data, but those can be bypassed by the guest: There is a timeout how long the client side of an interface can stop consuming new packets before it is assumed to have stalled, but this timeout is rather long (60 seconds by default). Using a UDP connection on a fast interface can easily accumulate gigabytes of data in that time. (CVE-2021-28715) The timeout could even never trigger if the guest manages to have only one free slot in its RX queue ring page and the next package would require more than one free slot, which may be the case when using GSO, XDP, or software hashing. (CVE-2021-28714)
References
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CVE-2022-27666 (GCVE-0-2022-27666)
Vulnerability from cvelistv5
Published
2022-03-23 05:07
Modified
2024-08-03 05:32
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
A heap buffer overflow flaw was found in IPsec ESP transformation code in net/ipv4/esp4.c and net/ipv6/esp6.c. This flaw allows a local attacker with a normal user privilege to overwrite kernel heap objects and may cause a local privilege escalation threat.
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CVE-2021-45469 (GCVE-0-2021-45469)
Vulnerability from cvelistv5
Published
2021-12-23 18:45
Modified
2024-08-04 04:39
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
In __f2fs_setxattr in fs/f2fs/xattr.c in the Linux kernel through 5.15.11, there is an out-of-bounds memory access when an inode has an invalid last xattr entry.
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CVE-2021-28715 (GCVE-0-2021-28715)
Vulnerability from cvelistv5
Published
2022-01-06 17:06
Modified
2025-05-22 18:34
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- unknown
Summary
Guest can force Linux netback driver to hog large amounts of kernel memory T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Incoming data packets for a guest in the Linux kernel's netback driver are buffered until the guest is ready to process them. There are some measures taken for avoiding to pile up too much data, but those can be bypassed by the guest: There is a timeout how long the client side of an interface can stop consuming new packets before it is assumed to have stalled, but this timeout is rather long (60 seconds by default). Using a UDP connection on a fast interface can easily accumulate gigabytes of data in that time. (CVE-2021-28715) The timeout could even never trigger if the guest manages to have only one free slot in its RX queue ring page and the next package would require more than one free slot, which may be the case when using GSO, XDP, or software hashing. (CVE-2021-28714)
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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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