github - ghsa-qv7j-3q84-2q98

GHSA-QV7J-3Q84-2Q98

Vulnerability from github – Published: 2022-05-24 17:22 – Updated: 2022-05-24 17:22

Details

A flaw was found in the fix for CVE-2019-11135, in the Linux upstream kernel versions before 5.5 where, the way Intel CPUs handle speculative execution of instructions when a TSX Asynchronous Abort (TAA) error occurs. When a guest is running on a host CPU affected by the TAA flaw (TAA_NO=0), but is not affected by the MDS issue (MDS_NO=1), the guest was to clear the affected buffers by using a VERW instruction mechanism. But when the MDS_NO=1 bit was exported to the guests, the guests did not use the VERW mechanism to clear the affected buffers. This issue affects guests running on Cascade Lake CPUs and requires that host has 'TSX' enabled. Confidentiality of data is the highest threat associated with this vulnerability.

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{
  "affected": [],
  "aliases": [
    "CVE-2019-19338"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-07-13T17:15:00Z",
    "severity": "LOW"
  },
  "details": "A flaw was found in the fix for CVE-2019-11135, in the Linux upstream kernel versions before 5.5 where, the way Intel CPUs handle speculative execution of instructions when a TSX Asynchronous Abort (TAA) error occurs. When a guest is running on a host CPU affected by the TAA flaw (TAA_NO=0), but is not affected by the MDS issue (MDS_NO=1), the guest was to clear the affected buffers by using a VERW instruction mechanism. But when the MDS_NO=1 bit was exported to the guests, the guests did not use the VERW mechanism to clear the affected buffers. This issue affects guests running on Cascade Lake CPUs and requires that host has \u0027TSX\u0027 enabled. Confidentiality of data is the highest threat associated with this vulnerability.",
  "id": "GHSA-qv7j-3q84-2q98",
  "modified": "2022-05-24T17:22:46Z",
  "published": "2022-05-24T17:22:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-19338"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19338"
    },
    {
      "type": "WEB",
      "url": "https://software.intel.com/security-software-guidance/insights/deep-dive-intel-transactional-synchronization-extensions-intel-tsx-asynchronous-abort"
    },
    {
      "type": "WEB",
      "url": "https://www.openwall.com/lists/oss-security/2019/12/10/3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2019-19338 (GCVE-0-2019-19338)

Vulnerability from cvelistv5 – Published: 2020-07-13 16:04 – Updated: 2024-08-05 02:16

Summary

Severity ?

5.5 (Medium)


                        
                          CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CWE

Assigner

redhat

References

URL

Tags

	https://www.openwall.com/lists/oss-security/2019/…	x_refsource_MISC
	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2…	x_refsource_CONFIRM
	https://software.intel.com/security-software-guid…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	[UNKNOWN]	Linux Kernel	Affected: before 5.5

Show details on NVD website

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            ],
            "url": "https://software.intel.com/security-software-guidance/insights/deep-dive-intel-transactional-synchronization-extensions-intel-tsx-asynchronous-abort"
          }
        ],
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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-QV7J-3Q84-2Q98

CVE-2019-19338 (GCVE-0-2019-19338)

Tags

Sightings

Nomenclature