Vulnerability-Lookup

SUSE-SU-2021:1268-1

Vulnerability from csaf_suse - Published: 2021-04-20 08:55 - Updated: 2026-09-20 13:53

Summary

Security update for xen

Severity

Important

Notes

Title of the patch: Security update for xen

Description of the patch: This update for xen fixes the following issues: - CVE-2021-27379: Fixed an issue where entries in the IOMMU were not being updated under certain circumstances due to improper backport of XSA-321 (XSA-366, bsc#1182431) - Fixed an issue where xenstored was crashing with segfault (bsc#1182155).

Patchnames: SUSE-2021-1268,SUSE-OpenStack-Cloud-7-2021-1268,SUSE-SLE-SERVER-12-SP2-BCL-2021-1268

CVE-2021-27379

7.9 (High)


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

Affected products

Recommended 18 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Enterprise High Performance Computing 12 SP2:xen-0:4.7.6_14-43.76.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Performance Computing 12 SP2:xen-doc-html-0:4.7.6_14-43.76.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Performance Computing 12 SP2:xen-libs-0:4.7.6_14-43.76.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Performance Computing 12 SP2:xen-libs-32bit-0:4.7.6_14-43.76.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Performance Computing 12 SP2:xen-tools-0:4.7.6_14-43.76.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Performance Computing 12 SP2:xen-tools-domU-0:4.7.6_14-43.76.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 12 SP2-BCL:xen-0:4.7.6_14-43.76.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 12 SP2-BCL:xen-doc-html-0:4.7.6_14-43.76.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-0:4.7.6_14-43.76.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 12 SP2-BCL:xen-libs-32bit-0:4.7.6_14-43.76.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 12 SP2-BCL:xen-tools-0:4.7.6_14-43.76.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 12 SP2-BCL:xen-tools-domU-0:4.7.6_14-43.76.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE OpenStack Cloud 7:xen-0:4.7.6_14-43.76.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE OpenStack Cloud 7:xen-doc-html-0:4.7.6_14-43.76.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE OpenStack Cloud 7:xen-libs-0:4.7.6_14-43.76.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE OpenStack Cloud 7:xen-libs-32bit-0:4.7.6_14-43.76.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE OpenStack Cloud 7:xen-tools-0:4.7.6_14-43.76.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE OpenStack Cloud 7:xen-tools-domU-0:4.7.6_14-43.76.1.x86_64	—	Vendor Fix

Threats

Impact important

References

9 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/s…	self
https://www.suse.com/support/update/announcement/…	self
https://lists.suse.com/pipermail/sle-security-upd…	self
https://bugzilla.suse.com/1182155	self
https://bugzilla.suse.com/1182431	self
https://www.suse.com/security/cve/CVE-2021-27379/	self
https://www.suse.com/security/cve/CVE-2021-27379	external
https://bugzilla.suse.com/1182431	external

JSON

To clipboard

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CVE-2021-27379 (GCVE-0-2021-27379)

Vulnerability from cvelistv5 – Published: 2021-02-18 15:05 – Updated: 2024-08-03 20:48

Summary

An issue was discovered in Xen through 4.11.x, allowing x86 Intel HVM guest OS users to achieve unintended read/write DMA access, and possibly cause a denial of service (host OS crash) or gain privileges. This occurs because a backport missed a flush, and thus IOMMU updates were not always correct. NOTE: this issue exists because of an incomplete fix for CVE-2020-15565.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root Scorecard

References

4 references

URL	Tags
http://xenbits.xen.org/xsa/advisory-366.html	x_refsource_CONFIRM
https://xenbits.xen.org/xsa/advisory-366.html	x_refsource_MISC
http://www.openwall.com/lists/oss-security/2021/02/23/1	mailing-listx_refsource_MLIST
https://www.debian.org/security/2021/dsa-4888	vendor-advisoryx_refsource_DEBIAN

Show details on NVD website

JSON

To clipboard

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    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-27379",
    "datePublished": "2021-02-18T15:05:25.000Z",
    "dateReserved": "2021-02-18T00:00:00.000Z",
    "dateUpdated": "2024-08-03T20:48:16.398Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

SUSE-SU-2021:1268-1

CVE-2021-27379 (GCVE-0-2021-27379)

Tags

Sightings

Nomenclature

Related by attack behaviour