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CERTFR-2020-AVI-213
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 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
| Vendor | Product | Description | ||
|---|---|---|---|---|
| Citrix | Citrix Hypervisor | Citrix XenServer version 7.1 LTSR CU2 sans le correctif de sécurité XS71ECU2037 | ||
| Citrix | Citrix Hypervisor | Citrix Hypervisor version 8.0 sans le correctif de sécurité XS80E010 | ||
| Citrix | Citrix Hypervisor | Citrix XenServer version 7.0 sans le correctif de sécurité XS70E077 | ||
| Citrix | Citrix Hypervisor | Citrix Hypervisor version 8.1 sans le correctif de sécurité XS81E003 |
References
| Title | Publication Time | Tags | |||
|---|---|---|---|---|---|
|
|||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Citrix XenServer version 7.1 LTSR CU2 sans le correctif de s\u00e9curit\u00e9 XS71ECU2037",
"product": {
"name": "Citrix Hypervisor",
"vendor": {
"name": "Citrix",
"scada": false
}
}
},
{
"description": "Citrix Hypervisor version 8.0 sans le correctif de s\u00e9curit\u00e9 XS80E010",
"product": {
"name": "Citrix Hypervisor",
"vendor": {
"name": "Citrix",
"scada": false
}
}
},
{
"description": "Citrix XenServer version 7.0 sans le correctif de s\u00e9curit\u00e9 XS70E077",
"product": {
"name": "Citrix Hypervisor",
"vendor": {
"name": "Citrix",
"scada": false
}
}
},
{
"description": "Citrix Hypervisor version 8.1 sans le correctif de s\u00e9curit\u00e9 XS81E003",
"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-2020-11741",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-11741"
},
{
"name": "CVE-2020-11742",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-11742"
},
{
"name": "CVE-2020-11743",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-11743"
},
{
"name": "CVE-2020-11740",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-11740"
}
],
"links": [],
"reference": "CERTFR-2020-AVI-213",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2020-04-15T00:00:00.000000"
}
],
"risks": [
{
"description": "D\u00e9ni de service \u00e0 distance"
},
{
"description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
}
],
"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 \u00e0\ndistance et une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es.\n",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans Citrix Hypervisor",
"vendor_advisories": [
{
"published_at": null,
"title": "Bulletin de s\u00e9curit\u00e9 Citrix CTX270837 du 14 avril 2020",
"url": "https://support.citrix.com/article/CTX270837"
}
]
}
CVE-2020-11742 (GCVE-0-2020-11742)
Vulnerability from cvelistv5 – Published: 2020-04-14 12:19 – Updated: 2024-08-04 11:41
VLAI?
EPSS
Summary
An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of bad continuation handling in GNTTABOP_copy. Grant table operations are expected to return 0 for success, and a negative number for errors. The fix for CVE-2017-12135 introduced a path through grant copy handling where success may be returned to the caller without any action taken. In particular, the status fields of individual operations are left uninitialised, and may result in errant behaviour in the caller of GNTTABOP_copy. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to copy a grant, it hits the incorrect exit path. This returns success to the caller without doing anything, which may cause crashes or other incorrect behaviour.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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CVE-2020-11740 (GCVE-0-2020-11740)
Vulnerability from cvelistv5 – Published: 2020-04-14 12:18 – Updated: 2024-08-04 11:41
VLAI?
EPSS
Summary
An issue was discovered in xenoprof in Xen through 4.13.x, allowing guest OS users (without active profiling) to obtain sensitive information about other guests. Unprivileged guests can request to map xenoprof buffers, even if profiling has not been enabled for those guests. These buffers were not scrubbed.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||
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CVE-2020-11743 (GCVE-0-2020-11743)
Vulnerability from cvelistv5 – Published: 2020-04-14 12:20 – Updated: 2024-08-04 11:41
VLAI?
EPSS
Summary
An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of a bad error path in GNTTABOP_map_grant. Grant table operations are expected to return 0 for success, and a negative number for errors. Some misplaced brackets cause one error path to return 1 instead of a negative value. The grant table code in Linux treats this condition as success, and proceeds with incorrectly initialised state. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to map a grant, it hits the incorrect error path. This will crash a Linux based dom0 or backend domain.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||
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CVE-2020-11741 (GCVE-0-2020-11741)
Vulnerability from cvelistv5 – Published: 2020-04-14 12:18 – Updated: 2024-08-04 11:41
VLAI?
EPSS
Summary
An issue was discovered in xenoprof in Xen through 4.13.x, allowing guest OS users (with active profiling) to obtain sensitive information about other guests, cause a denial of service, or possibly gain privileges. For guests for which "active" profiling was enabled by the administrator, the xenoprof code uses the standard Xen shared ring structure. Unfortunately, this code did not treat the guest as a potential adversary: it trusts the guest not to modify buffer size information or modify head / tail pointers in unexpected ways. This can crash the host (DoS). Privilege escalation cannot be ruled out.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||
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"name": "FEDORA-2020-cbc3149753",
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"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NVTP4OYHCTRU3ONFJOFJQVNDFB25KLLG/"
},
{
"name": "GLSA-202005-08",
"refsource": "GENTOO",
"url": "https://security.gentoo.org/glsa/202005-08"
},
{
"name": "DSA-4723",
"refsource": "DEBIAN",
"url": "https://www.debian.org/security/2020/dsa-4723"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2020-11741",
"datePublished": "2020-04-14T12:18:52",
"dateReserved": "2020-04-14T00:00:00",
"dateUpdated": "2024-08-04T11:41:58.158Z",
"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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