github - ghsa-6676-52pp-h5fg

ghsa-6676-52pp-h5fg

Vulnerability from github

Published

2022-05-24 17:36

Modified

2022-05-24 17:36

Severity ?

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

Details

An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the states connect and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback.

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{
  "affected": [],
  "aliases": [
    "CVE-2020-29569"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-252",
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-12-15T17:15:00Z",
    "severity": "HIGH"
  },
  "details": "An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring-\u003exenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the states connect and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback.",
  "id": "GHSA-6676-52pp-h5fg",
  "modified": "2022-05-24T17:36:34Z",
  "published": "2022-05-24T17:36:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-29569"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202107-30"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20210205-0001"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2021/dsa-4843"
    },
    {
      "type": "WEB",
      "url": "https://xenbits.xenproject.org/xsa/advisory-350.html"
    }
  ],
  "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-2020-29569

Vulnerability from cvelistv5

Published

2020-12-15 17:00

Modified

2024-08-04 16:55

Severity ?

Summary

References

▼	URL	Tags
	https://xenbits.xenproject.org/xsa/advisory-350.html	x_refsource_MISC
	https://www.debian.org/security/2021/dsa-4843	vendor-advisory, x_refsource_DEBIAN
	https://security.netapp.com/advisory/ntap-20210205-0001/	x_refsource_CONFIRM
	https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html	mailing-list, x_refsource_MLIST
	https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html	mailing-list, x_refsource_MLIST
	https://security.gentoo.org/glsa/202107-30	vendor-advisory, x_refsource_GENTOO

Impacted products

▼	Vendor	Product
	n/a	n/a

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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        "providerMetadata": {
          "dateUpdated": "2024-08-04T16:55:10.494Z",
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        "references": [
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            ],
            "url": "https://xenbits.xenproject.org/xsa/advisory-350.html"
          },
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          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210205-0001/"
          },
          {
            "name": "[debian-lts-announce] 20210212 [SECURITY] [DLA 2557-1] linux-4.19 security update",
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            "url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html"
          },
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            "tags": [
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              "x_refsource_GENTOO",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202107-30"
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      "providerMetadata": {
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          "url": "https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html"
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          "tags": [
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          ],
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          ],
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            },
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            },
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    "datePublished": "2020-12-15T17:00:36",
    "dateReserved": "2020-12-04T00:00:00",
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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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