github - ghsa-23j5-p74r-rvqm

ghsa-23j5-p74r-rvqm

Vulnerability from github

Published

2022-05-24 19:06

Modified

2022-05-24 19:06

Details

inappropriate x86 IOMMU timeout detection / handling IOMMUs process commands issued to them in parallel with the operation of the CPU(s) issuing such commands. In the current implementation in Xen, asynchronous notification of the completion of such commands is not used. Instead, the issuing CPU spin-waits for the completion of the most recently issued command(s). Some of these waiting loops try to apply a timeout to fail overly-slow commands. The course of action upon a perceived timeout actually being detected is inappropriate: - on Intel hardware guests which did not originally cause the timeout may be marked as crashed, - on AMD hardware higher layer callers would not be notified of the issue, making them continue as if the IOMMU operation succeeded.

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{
  "affected": [],
  "aliases": [
    "CVE-2021-28692"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-269"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-06-30T11:15:00Z",
    "severity": "HIGH"
  },
  "details": "inappropriate x86 IOMMU timeout detection / handling IOMMUs process commands issued to them in parallel with the operation of the CPU(s) issuing such commands. In the current implementation in Xen, asynchronous notification of the completion of such commands is not used. Instead, the issuing CPU spin-waits for the completion of the most recently issued command(s). Some of these waiting loops try to apply a timeout to fail overly-slow commands. The course of action upon a perceived timeout actually being detected is inappropriate: - on Intel hardware guests which did not originally cause the timeout may be marked as crashed, - on AMD hardware higher layer callers would not be notified of the issue, making them continue as if the IOMMU operation succeeded.",
  "id": "GHSA-23j5-p74r-rvqm",
  "modified": "2022-05-24T19:06:40Z",
  "published": "2022-05-24T19:06:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-28692"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202107-30"
    },
    {
      "type": "WEB",
      "url": "https://xenbits.xenproject.org/xsa/advisory-373.txt"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

cve-2021-28692

Vulnerability from cvelistv5

Published

2021-06-30 10:27

Modified

2024-08-03 21:47

Severity ?

Summary

References

▼	URL	Tags
	https://xenbits.xenproject.org/xsa/advisory-373.txt	x_refsource_MISC
	https://security.gentoo.org/glsa/202107-30	vendor-advisory, x_refsource_GENTOO

Impacted products

Vendor

Product

Version

▼

Xen

xen

Version: 4.13.x

Xen	xen	Version: 4.14.x
Xen	xen	Version: 4.15.x
Xen	xen	Version: xen-unstable
Xen	xen	Version: 4.12.x
Xen	xen	Version: 4.11.x

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                }
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            }
          }
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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.
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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