github - ghsa-2vg6-vx3w-m2r4

ghsa-2vg6-vx3w-m2r4

Vulnerability from github

Published

2022-02-19 00:01

Modified

2023-01-19 18:30

Severity ?

8.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Details

A flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization-Encrypted State (SEV-ES). A KVM guest using SEV-ES can trigger out-of-bounds reads and writes in the host kernel via a malicious VMGEXIT for a string I/O instruction (for example, outs or ins) using the exit reason SVM_EXIT_IOIO. This issue results in a crash of the entire system or a potential guest-to-host escape scenario.

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{
  "affected": [],
  "aliases": [
    "CVE-2021-4093"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-02-18T18:15:00Z",
    "severity": "HIGH"
  },
  "details": "A flaw was found in the KVM\u0027s AMD code for supporting the Secure Encrypted Virtualization-Encrypted State (SEV-ES). A KVM guest using SEV-ES can trigger out-of-bounds reads and writes in the host kernel via a malicious VMGEXIT for a string I/O instruction (for example, outs or ins) using the exit reason SVM_EXIT_IOIO. This issue results in a crash of the entire system or a potential guest-to-host escape scenario.",
  "id": "GHSA-2vg6-vx3w-m2r4",
  "modified": "2023-01-19T18:30:27Z",
  "published": "2022-02-19T00:01:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-4093"
    },
    {
      "type": "WEB",
      "url": "https://bugs.chromium.org/p/project-zero/issues/detail?id=2222"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2028584"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2021-4093 (GCVE-0-2021-4093)

Vulnerability from cvelistv5

Published

2022-02-18 17:50

Modified

2024-08-03 17:16

Severity ?

CWE

CWE-125 - (|CWE-787)

Summary

A flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization-Encrypted State (SEV-ES). A KVM guest using SEV-ES can trigger out-of-bounds reads and writes in the host kernel via a malicious VMGEXIT for a string I/O instruction (for example, outs or ins) using the exit reason SVM_EXIT_IOIO. This issue results in a crash of the entire system or a potential guest-to-host escape scenario.

References

URL

Tags

	https://bugzilla.redhat.com/show_bug.cgi?id=2028584	x_refsource_MISC
	https://bugs.chromium.org/p/project-zero/issues/detail?id=2222	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	n/a	kernel	Version: kernel 5.15

Show details on NVD website

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