gsd-2022-33742
Vulnerability from gsd
Modified
2023-12-13 01:19
Details
Linux disk/nic frontends data leaks T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Linux Block and Network PV device frontends don't zero memory regions before sharing them with the backend (CVE-2022-26365, CVE-2022-33740). Additionally the granularity of the grant table doesn't allow sharing less than a 4K page, leading to unrelated data residing in the same 4K page as data shared with a backend being accessible by such backend (CVE-2022-33741, CVE-2022-33742).
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2022-33742",
"description": "Linux disk/nic frontends data leaks T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Linux Block and Network PV device frontends don\u0027t zero memory regions before sharing them with the backend (CVE-2022-26365, CVE-2022-33740). Additionally the granularity of the grant table doesn\u0027t allow sharing less than a 4K page, leading to unrelated data residing in the same 4K page as data shared with a backend being accessible by such backend (CVE-2022-33741, CVE-2022-33742).",
"id": "GSD-2022-33742",
"references": [
"https://www.suse.com/security/cve/CVE-2022-33742.html",
"https://www.debian.org/security/2022/dsa-5191",
"https://advisories.mageia.org/CVE-2022-33742.html",
"https://alas.aws.amazon.com/cve/html/CVE-2022-33742.html",
"https://ubuntu.com/security/CVE-2022-33742"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
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],
"details": "Linux disk/nic frontends data leaks T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Linux Block and Network PV device frontends don\u0027t zero memory regions before sharing them with the backend (CVE-2022-26365, CVE-2022-33740). Additionally the granularity of the grant table doesn\u0027t allow sharing less than a 4K page, leading to unrelated data residing in the same 4K page as data shared with a backend being accessible by such backend (CVE-2022-33741, CVE-2022-33742).",
"id": "GSD-2022-33742",
"modified": "2023-12-13T01:19:23.787100Z",
"schema_version": "1.4.0"
}
},
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"STATE": "PUBLIC"
},
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{
"product": {
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{
"product_name": "Linux",
"version": {
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"version_affected": "?",
"version_value": "consult Xen advisory XSA-403"
}
]
}
}
]
},
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{
"product": {
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}
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"lang": "eng",
"value": "All Linux guests using PV devices are vulnerable in case potentially\nmalicious PV device backends are being used."
}
]
}
}
},
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"credit_data": {
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"description_data": [
{
"lang": "eng",
"value": "The issue related to not zeroing memory areas used for shared communications\nwas discovered by Roger Pau Monn\u00e9 of Citrix.\n\nThe issue related to leaking contiguous data in granted pages was disclosed\npublicly."
}
]
}
}
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}
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},
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"description": {
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{
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"value": "An untrusted backend can access data not intended to be shared. If such\nmappings are made with write permissions the backend could also cause\nmalfunctions and/or crashes to consumers of contiguous data in the shared\npages."
}
]
}
}
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"url": "http://www.openwall.com/lists/oss-security/2022/07/05/6"
},
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},
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"name": "DSA-5191",
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"url": "https://www.debian.org/security/2022/dsa-5191"
},
{
"name": "[debian-lts-announce] 20221002 [SECURITY] [DLA 3131-1] linux security update",
"refsource": "MLIST",
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"workaround": {
"workaround_data": {
"description": {
"description_data": [
{
"lang": "eng",
"value": "There is no mitigation available other than not using PV devices in case\na backend is suspected to be potentially malicious."
}
]
}
}
}
},
"nvd.nist.gov": {
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},
"impact": {
"baseMetricV2": {
"acInsufInfo": false,
"cvssV2": {
"accessComplexity": "LOW",
"accessVector": "LOCAL",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 3.6,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "NONE",
"vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 3.9,
"impactScore": 4.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"severity": "LOW",
"userInteractionRequired": false
},
"baseMetricV3": {
"cvssV3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.2
}
},
"lastModifiedDate": "2023-07-20T15:11Z",
"publishedDate": "2022-07-05T13:15Z"
}
}
}
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- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- 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.