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CERTFR-2021-AVI-227
Vulnerability from certfr_avis - Published: - Updated:
De multiples vulnérabilités ont été découvertes dans Citrix Hypervisor. Elles permettent à un attaquant de provoquer un déni de service.
Solution
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
NoneImpacted products
| Vendor | Product | Description | ||
|---|---|---|---|---|
| Citrix | Citrix Hypervisor | Citrix Hypervisor 8.2 LTSR sans les correctifs XS82E009 et XS82E022 | ||
| Citrix | Citrix Hypervisor | Citrix XenServer 7.1 LTSR CU2 sans le correctif XS71ECU2058 | ||
| Citrix | Citrix Hypervisor | Citrix XenServer 7.0 sans le correctif XS70E092 |
References
| Title | Publication Time | Tags | |||
|---|---|---|---|---|---|
|
|||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Citrix Hypervisor 8.2 LTSR sans les correctifs XS82E009 et XS82E022",
"product": {
"name": "Citrix Hypervisor",
"vendor": {
"name": "Citrix",
"scada": false
}
}
},
{
"description": "Citrix XenServer 7.1 LTSR CU2 sans le correctif XS71ECU2058",
"product": {
"name": "Citrix Hypervisor",
"vendor": {
"name": "Citrix",
"scada": false
}
}
},
{
"description": "Citrix XenServer 7.0 sans le correctif XS70E092",
"product": {
"name": "Citrix Hypervisor",
"vendor": {
"name": "Citrix",
"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-2021-28038",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-28038"
},
{
"name": "CVE-2020-35498",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-35498"
},
{
"name": "CVE-2021-28688",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-28688"
}
],
"links": [],
"reference": "CERTFR-2021-AVI-227",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2021-03-31T00:00:00.000000"
}
],
"risks": [
{
"description": "D\u00e9ni de service"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Citrix Hypervisor.\nElles permettent \u00e0 un attaquant de provoquer un d\u00e9ni de service.\n",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans Citrix Hypervisor",
"vendor_advisories": [
{
"published_at": null,
"title": "Bulletin de s\u00e9curit\u00e9 Citrix CTX306565 du 30 mars 2021",
"url": "https://support.citrix.com/article/CTX306565"
}
]
}
CVE-2021-28688 (GCVE-0-2021-28688)
Vulnerability from cvelistv5 – Published: 2021-04-06 18:07 – Updated: 2024-08-03 21:47
VLAI?
EPSS
Summary
The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or stale values. This initialization went too far and may under certain conditions also overwrite pointers which are in need of cleaning up. The lack of cleanup would result in leaking persistent grants. The leak in turn would prevent fully cleaning up after a respective guest has died, leaving around zombie domains. All Linux versions having the fix for XSA-365 applied are vulnerable. XSA-365 was classified to affect versions back to at least 3.11.
Severity ?
No CVSS data available.
CWE
- unknown
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Impacted products
Credits
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CVE-2020-35498 (GCVE-0-2020-35498)
Vulnerability from cvelistv5 – Published: 2021-02-11 00:00 – Updated: 2025-04-23 19:46
VLAI?
EPSS
Summary
A vulnerability was found in openvswitch. A limitation in the implementation of userspace packet parsing can allow a malicious user to send a specially crafted packet causing the resulting megaflow in the kernel to be too wide, potentially causing a denial of service. The highest threat from this vulnerability is to system availability.
Severity ?
7.5 (High)
CWE
Assigner
References
| URL | Tags | |
|---|---|---|
|
|
||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| n/a | openvswitch |
Affected:
openvswitch 2.5.12, openvswitch 2.6.10, openvswitch 2.7.13, openvswitch 2.8.11, openvswitch 2.9.9, openvswitch 2.10.7, openvswitch 2.11.6, openvswitch 2.12.3, openvswitch 2.13.3, openvswitch 2.14.2
|
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CVE-2021-28038 (GCVE-0-2021-28038)
Vulnerability from cvelistv5 – Published: 2021-03-05 00:00 – Updated: 2024-08-03 21:33
VLAI?
EPSS
Summary
An issue was discovered in the Linux kernel through 5.11.3, as used with Xen PV. A certain part of the netback driver lacks necessary treatment of errors such as failed memory allocations (as a result of changes to the handling of grant mapping errors). A host OS denial of service may occur during misbehavior of a networking frontend driver. NOTE: this issue exists because of an incomplete fix for CVE-2021-26931.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
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"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre"
},
"references": [
{
"url": "http://xenbits.xen.org/xsa/advisory-367.html"
},
{
"name": "[oss-security] 20210305 Xen Security Advisory 367 v2 (CVE-2021-28038) - Linux: netback fails to honor grant mapping errors",
"tags": [
"mailing-list"
],
"url": "http://www.openwall.com/lists/oss-security/2021/03/05/1"
},
{
"name": "[debian-lts-announce] 20210309 [SECURITY] [DLA 2586-1] linux security update",
"tags": [
"mailing-list"
],
"url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html"
},
{
"name": "[debian-lts-announce] 20210330 [SECURITY] [DLA 2610-1] linux-4.19 security update",
"tags": [
"mailing-list"
],
"url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html"
},
{
"url": "https://security.netapp.com/advisory/ntap-20210409-0001/"
},
{
"url": "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2991397d23ec597405b116d96de3813420bdcbc3"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2021-28038",
"datePublished": "2021-03-05T00:00:00",
"dateReserved": "2021-03-05T00:00:00",
"dateUpdated": "2024-08-03T21:33:17.329Z",
"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 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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