github - ghsa-8j79-g729-4vv7

GHSA-8J79-G729-4VV7

Vulnerability from github – Published: 2023-02-18 00:31 – Updated: 2023-02-28 21:30

Details

HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107, function pci_vtsock_proc_tx in virtio-sock can lead to to uninitialized memory use. In this situation, there is a check for the return value to be less or equal to VTSOCK_MAXSEGS, but that check is not sufficient because the function can return -1 if it finds an error it cannot recover from. Moreover, the negative return value will be used by iovec_pull in a while condition that can further lead to more corruption because the function is not designed to handle a negative iov_len. This issue may lead to a guest crashing the host causing a denial of service and, under certain circumstance, memory corruption. This issue is fixed in commit af5eba2360a7351c08dfd9767d9be863a50ebaba.

Severity ?

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2021-32846"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-754",
      "CWE-908"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-02-17T23:15:00Z",
    "severity": "HIGH"
  },
  "details": "HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107, function `pci_vtsock_proc_tx` in `virtio-sock` can lead to to uninitialized memory use. In this situation, there is a check for the return value to be less or equal to `VTSOCK_MAXSEGS`, but that check is not sufficient because the function can return `-1` if it finds an error it cannot recover from. Moreover, the negative return value will be used by `iovec_pull` in a while condition that can further lead to more corruption because the function is not designed to handle a negative `iov_len`. This issue may lead to a guest crashing the host causing a denial of service and, under certain circumstance, memory corruption. This issue is fixed in commit af5eba2360a7351c08dfd9767d9be863a50ebaba.",
  "id": "GHSA-8j79-g729-4vv7",
  "modified": "2023-02-28T21:30:17Z",
  "published": "2023-02-18T00:31:58Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-32846"
    },
    {
      "type": "WEB",
      "url": "https://github.com/moby/hyperkit/pull/313"
    },
    {
      "type": "WEB",
      "url": "https://github.com/moby/hyperkit/commit/af5eba2360a7351c08dfd9767d9be863a50ebaba"
    },
    {
      "type": "ADVISORY",
      "url": "https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2021-32846 (GCVE-0-2021-32846)

Vulnerability from cvelistv5 – Published: 2023-02-17 00:00 – Updated: 2025-03-10 21:09

Summary

HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107, function `pci_vtsock_proc_tx` in `virtio-sock` can lead to to uninitialized memory use. In this situation, there is a check for the return value to be less or equal to `VTSOCK_MAXSEGS`, but that check is not sufficient because the function can return `-1` if it finds an error it cannot recover from. Moreover, the negative return value will be used by `iovec_pull` in a while condition that can further lead to more corruption because the function is not designed to handle a negative `iov_len`. This issue may lead to a guest crashing the host causing a denial of service and, under certain circumstance, memory corruption. This issue is fixed in commit af5eba2360a7351c08dfd9767d9be863a50ebaba.

Severity ?

7.7 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

CWE

CWE-908 - Use of Uninitialized Resource

Assigner

GitHub_M

References

URL

Tags

	https://securitylab.github.com/advisories/GHSL-20…
	https://github.com/moby/hyperkit/pull/313
	https://github.com/moby/hyperkit/commit/af5eba236…

Impacted products

	Vendor	Product	Version
	moby	hyperkit	Affected: 0.20210107 , ≤ 0.20210107 (custom)

Show details on NVD website

JSON

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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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-8J79-G729-4VV7

CVE-2021-32846 (GCVE-0-2021-32846)

Tags

Sightings

Nomenclature