Rogue backends can cause DoS of guests via high frequency events T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen offers the ability to run PV backends in regular unprivileged guests, typically referred to as "driver domains". Running PV backends in driver domains has one primary security advantage: if a driver domain gets compromised, it doesn't have the privileges to take over the system. However, a malicious driver domain could try to attack other guests via sending events at a high frequency leading to a Denial of Service in the guest due to trying to service interrupts for elongated amounts of time. There are three affected backends: * blkfront patch 1, CVE-2021-28711 * netfront patch 2, CVE-2021-28712 * hvc_xen (console) patch 3, CVE-2021-28713
References
Link | Resource |
---|---|
https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html | Third Party Advisory |
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html | Third Party Advisory |
https://www.debian.org/security/2022/dsa-5050 | Third Party Advisory |
https://www.debian.org/security/2022/dsa-5096 | Third Party Advisory |
https://xenbits.xenproject.org/xsa/advisory-391.txt | Patch Vendor Advisory |
Configurations
History
06 Apr 2022, 16:18
Type | Values Removed | Values Added |
---|---|---|
CPE | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
|
References | (DEBIAN) https://www.debian.org/security/2022/dsa-5096 - Third Party Advisory | |
References | (MLIST) https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html - Third Party Advisory | |
References | (MLIST) https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html - Third Party Advisory | |
References | (DEBIAN) https://www.debian.org/security/2022/dsa-5050 - Third Party Advisory |
10 Mar 2022, 17:42
Type | Values Removed | Values Added |
---|---|---|
References |
|
21 Jan 2022, 20:15
Type | Values Removed | Values Added |
---|---|---|
References |
|
18 Jan 2022, 16:09
Type | Values Removed | Values Added |
---|---|---|
CPE | cpe:2.3:o:xen:xen:-:*:*:*:*:*:*:* | |
References | (MISC) https://xenbits.xenproject.org/xsa/advisory-391.txt - Patch, Vendor Advisory | |
CWE | NVD-CWE-noinfo | |
CVSS |
v2 : v3 : |
v2 : 2.1
v3 : 6.5 |
05 Jan 2022, 18:43
Type | Values Removed | Values Added |
---|---|---|
New CVE |
Information
Published : 2022-01-05 17:15
Updated : 2024-02-04 22:08
NVD link : CVE-2021-28711
Mitre link : CVE-2021-28711
CVE.ORG link : CVE-2021-28711
JSON object : View
Products Affected
xen
- xen
debian
- debian_linux
CWE