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.
References
| Link | Resource |
|---|---|
| http://www.openwall.com/lists/oss-security/2021/02/23/1 | Mailing List Third Party Advisory |
| http://xenbits.xen.org/xsa/advisory-366.html | Mitigation Patch Vendor Advisory |
| https://www.debian.org/security/2021/dsa-4888 | Third Party Advisory |
| https://xenbits.xen.org/xsa/advisory-366.html | Patch Vendor Advisory |
| http://www.openwall.com/lists/oss-security/2021/02/23/1 | Mailing List Third Party Advisory |
| http://xenbits.xen.org/xsa/advisory-366.html | Mitigation Patch Vendor Advisory |
| https://www.debian.org/security/2021/dsa-4888 | Third Party Advisory |
| https://xenbits.xen.org/xsa/advisory-366.html | Patch Vendor Advisory |
Configurations
History
21 Nov 2024, 05:57
| Type | Values Removed | Values Added |
|---|---|---|
| References | () http://www.openwall.com/lists/oss-security/2021/02/23/1 - Mailing List, Third Party Advisory | |
| References | () http://xenbits.xen.org/xsa/advisory-366.html - Mitigation, Patch, Vendor Advisory | |
| References | () https://www.debian.org/security/2021/dsa-4888 - Third Party Advisory | |
| References | () https://xenbits.xen.org/xsa/advisory-366.html - Patch, Vendor Advisory |
Information
Published : 2021-02-18 17:15
Updated : 2024-11-21 05:57
NVD link : CVE-2021-27379
Mitre link : CVE-2021-27379
CVE.ORG link : CVE-2021-27379
JSON object : View
Products Affected
debian
- debian_linux
xen
- xen
CWE