CVE-2021-27379
Summary
| CVE | CVE-2021-27379 |
|---|---|
| State | PUBLIC |
| Assigner | [email protected] |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2021-02-18 17:15:00 UTC |
| Updated | 2022-05-27 17:09:00 UTC |
| Description | 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. |
Risk And Classification
Problem Types: NVD-CWE-Other
NVD Known Affected Configurations (CPE 2.3)
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| XSA-366 - Xen Security Advisories | MISC | xenbits.xen.org | Patch, Vendor Advisory |
| Debian -- Security Information -- DSA-4888-1 xen | DEBIAN | www.debian.org | |
| XSA-366 - Xen Security Advisories | CONFIRM | xenbits.xen.org | |
| oss-security - Xen Security Advisory 366 v2 (CVE-2021-27379) - missed flush in XSA-321 backport | MLIST | www.openwall.com | Mailing List, Third Party Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Legacy QID Mappings
- 174927 SUSE Enterprise Linux Security Update for xen (SUSE-SU-2021:1250-1)
- 174928 SUSE Enterprise Linux Security Update for xen (SUSE-SU-2021:1252-1)
- 174929 SUSE Enterprise Linux Security Update for xen (SUSE-SU-2021:1251-1)
- 178530 Debian Security Update for xen (DSA 4888-1)
- 180504 Debian Security Update for xen (CVE-2021-27379)
- 377778 Citrix XenServer Security Updates (CTX316324)