github - ghsa-74f6-jp2h-2vw3

GHSA-74F6-JP2H-2VW3

Vulnerability from github – Published: 2022-01-26 00:01 – Updated: 2022-03-26 00:01

Details

arm: guest_physmap_remove_page not removing the p2m mappings The functions to remove one or more entries from a guest p2m pagetable on Arm (p2m_remove_mapping, guest_physmap_remove_page, and p2m_set_entry with mfn set to INVALID_MFN) do not actually clear the pagetable entry if the entry doesn't have the valid bit set. It is possible to have a valid pagetable entry without the valid bit set when a guest operating system uses set/way cache maintenance instructions. For instance, a guest issuing a set/way cache maintenance instruction, then calling the XENMEM_decrease_reservation hypercall to give back memory pages to Xen, might be able to retain access to those pages even after Xen started reusing them for other purposes.

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-2022-23033"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-01-25T14:15:00Z",
    "severity": "HIGH"
  },
  "details": "arm: guest_physmap_remove_page not removing the p2m mappings The functions to remove one or more entries from a guest p2m pagetable on Arm (p2m_remove_mapping, guest_physmap_remove_page, and p2m_set_entry with mfn set to INVALID_MFN) do not actually clear the pagetable entry if the entry doesn\u0027t have the valid bit set. It is possible to have a valid pagetable entry without the valid bit set when a guest operating system uses set/way cache maintenance instructions. For instance, a guest issuing a set/way cache maintenance instruction, then calling the XENMEM_decrease_reservation hypercall to give back memory pages to Xen, might be able to retain access to those pages even after Xen started reusing them for other purposes.",
  "id": "GHSA-74f6-jp2h-2vw3",
  "modified": "2022-03-26T00:01:04Z",
  "published": "2022-01-26T00:01:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-23033"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OMR6UBGJW6JKND7IILGQ2CU35EQPF3E3"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202208-23"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2022/dsa-5117"
    },
    {
      "type": "WEB",
      "url": "https://xenbits.xenproject.org/xsa/advisory-393.txt"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2022/01/25/2"
    }
  ],
  "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-2022-23033 (GCVE-0-2022-23033)

Vulnerability from cvelistv5 – Published: 2022-01-25 13:36 – Updated: 2024-08-03 03:28

Summary

Severity ?

No CVSS data available.

CWE

unknown

Assigner

XEN

References

URL

Tags

	https://xenbits.xenproject.org/xsa/advisory-393.txt	x_refsource_MISC
	http://www.openwall.com/lists/oss-security/2022/01/25/2	mailing-listx_refsource_MLIST
	https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
	https://www.debian.org/security/2022/dsa-5117	vendor-advisoryx_refsource_DEBIAN
	https://security.gentoo.org/glsa/202208-23	vendor-advisoryx_refsource_GENTOO

Impacted products

	Vendor	Product	Version
	Xen	xen	Unknown: consult Xen advisory XSA-393

Credits

{'credit_data': {'description': {'description_data': [{'lang': 'eng', 'value': 'This issue was discovered by Dmytro Firsov of EPAM.'}]}}}

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            "url": "https://xenbits.xenproject.org/xsa/advisory-393.txt"
          },
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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-74F6-JP2H-2VW3

CVE-2022-23033 (GCVE-0-2022-23033)

Tags

Sightings

Nomenclature