Vulnerability-Lookup

GHSA-2MFJ-VMVJ-Q937

Vulnerability from github – Published: 2022-06-10 00:00 – Updated: 2022-06-22 00:00

Details

x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, the logic for acquiring a type reference has a race condition, whereby a safely TLB flush is issued too early and creates a window where the guest can re-establish the read/write mapping before writeability is prohibited.

Severity

6.4 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2022-26362"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-06-09T17:15:00Z",
    "severity": "MODERATE"
  },
  "details": "x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen\u0027s safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, the logic for acquiring a type reference has a race condition, whereby a safely TLB flush is issued too early and creates a window where the guest can re-establish the read/write mapping before writeability is prohibited.",
  "id": "GHSA-2mfj-vmvj-q937",
  "modified": "2022-06-22T00:00:57Z",
  "published": "2022-06-10T00:00:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-26362"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OH65U6FTTB5MLH5A6Q3TW7KVCGOG4MYI"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202208-23"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2022/dsa-5184"
    },
    {
      "type": "WEB",
      "url": "https://xenbits.xenproject.org/xsa/advisory-401.txt"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/167718/Xen-TLB-Flush-Bypass.html"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2022/06/09/3"
    },
    {
      "type": "WEB",
      "url": "http://xenbits.xen.org/xsa/advisory-401.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-26362 (GCVE-0-2022-26362)

Vulnerability from cvelistv5 – Published: 2022-06-09 12:50 – Updated: 2024-08-03 05:03

Summary

Severity

No CVSS data available.

CWE

unknown

Assigner

XEN mitre root

References

8 references

URL	Tags
https://xenbits.xenproject.org/xsa/advisory-401.txt	x_refsource_MISC
http://xenbits.xen.org/xsa/advisory-401.html	x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2022/06/09/3	mailing-listx_refsource_MLIST
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
http://packetstormsecurity.com/files/167718/Xen-T…	x_refsource_MISC
https://www.debian.org/security/2022/dsa-5184	vendor-advisoryx_refsource_DEBIAN
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://security.gentoo.org/glsa/202208-23	vendor-advisoryx_refsource_GENTOO

Impacted products

1 product

Vendor	Product	Version
Xen	xen	Unknown: consult Xen advisory XSA-401

Credits

{'credit_data': {'description': {'description_data': [{'lang': 'eng', 'value': 'This issue was discovered by Jann Horn of Google Project Zero.'}]}}}

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{
  "containers": {
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          "dateUpdated": "2024-08-03T05:03:32.792Z",
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            "url": "https://xenbits.xenproject.org/xsa/advisory-401.txt"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
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            "url": "http://xenbits.xen.org/xsa/advisory-401.html"
          },
          {
            "name": "[oss-security] 20220609 Xen Security Advisory 401 v2 (CVE-2022-26362) - x86 pv: Race condition in typeref acquisition",
            "tags": [
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            "url": "http://www.openwall.com/lists/oss-security/2022/06/09/3"
          },
          {
            "name": "FEDORA-2022-0142d562ca",
            "tags": [
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              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OH65U6FTTB5MLH5A6Q3TW7KVCGOG4MYI/"
          },
          {
            "tags": [
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              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/167718/Xen-TLB-Flush-Bypass.html"
          },
          {
            "name": "DSA-5184",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2022/dsa-5184"
          },
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          },
          {
            "name": "GLSA-202208-23",
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      "metrics": [
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        {
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}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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GHSA-2MFJ-VMVJ-Q937

CVE-2022-26362 (GCVE-0-2022-26362)

Tags

Sightings

Nomenclature

Related by attack behaviour