Description
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
Details
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| linux | — | 5.4.0-105.119 |
| linux-aws | — | 5.4.0-1069.73 |
| linux-aws-5.0 | — | — |
| linux-aws-5.11 | — | — |
| linux-aws-5.13 | — | 5.13.0-1019.21~20.04.1 |
| linux-aws-5.3 | — | — |
| linux-aws-5.4 | — | 5.4.0-1069.73~18.04.1 |
| linux-aws-5.8 | — | — |
| linux-aws-fips | — | — |
| linux-aws-hwe | — | 4.15.0-1120.128~16.04.1 |
| linux-azure | — | 5.4.0-1073.76 |
| linux-azure-4.15 | — | 4.15.0-1131.144 |
| linux-azure-5.11 | — | — |
| linux-azure-5.13 | — | 5.13.0-1021.24~20.04.1 |
| linux-azure-5.3 | — | — |
| linux-azure-5.4 | — | 5.4.0-1073.76~18.04.1 |
| linux-azure-5.8 | — | — |
| linux-azure-edge | — | — |
| linux-azure-fde-5.15 | — | — |
| linux-azure-fips | — | — |
| linux-bluefield | — | — |
| linux-dell300x | — | 4.15.0-1035.40 |
| linux-fips | — | — |
| linux-gcp | — | 5.4.0-1068.72 |
| linux-gcp-4.15 | — | 4.15.0-1116.130 |
| linux-gcp-5.11 | — | — |
| linux-gcp-5.13 | — | 5.13.0-1021.25~20.04.1 |
| linux-gcp-5.3 | — | — |
| linux-gcp-5.4 | — | 5.4.0-1068.72~18.04.1 |
| linux-gcp-5.8 | — | — |
| linux-gcp-fips | — | — |
| linux-gke | — | 5.4.0-1066.69 |
| linux-gke-4.15 | — | — |
| linux-gke-5.4 | — | 5.4.0-1066.69~18.04.1 |
| linux-gkeop | — | 5.4.0-1037.38 |
| linux-gkeop-5.4 | — | 5.4.0-1037.38~18.04.1 |
| linux-hwe | — | — |
| linux-hwe-5.11 | — | — |
| linux-hwe-5.13 | — | 5.13.0-37.42~20.04.1 |
| linux-hwe-5.4 | — | 5.4.0-105.119~18.04.1 |
| linux-hwe-5.8 | — | — |
| linux-hwe-edge | — | — |
| linux-ibm | — | 5.4.0-1018.20 |
| linux-ibm-5.4 | — | 5.4.0-1018.20~18.04.1 |
| linux-intel-5.13 | — | — |
| linux-intel-iot-realtime | — | — |
| linux-kvm | — | 5.4.0-1059.62 |
| linux-lts-xenial | — | 4.4.0-239.273~14.04.1 |
| linux-oem | — | — |
| linux-oem-5.10 | — | — |
| linux-oem-5.13 | — | — |
| linux-oem-5.14 | — | 5.14.0-1022.24 |
| linux-oem-5.6 | — | — |
| linux-oracle | — | 5.4.0-1067.72 |
| linux-oracle-5.0 | — | — |
| linux-oracle-5.11 | — | — |
| linux-oracle-5.13 | — | 5.13.0-1025.30~20.04.1 |
| linux-oracle-5.3 | — | — |
| linux-oracle-5.4 | — | 5.4.0-1067.72~18.04.1 |
| linux-oracle-5.8 | — | — |
| linux-raspi | — | 5.4.0-1056.63 |
| linux-raspi-5.4 | — | 5.4.0-1056.63~18.04.1 |
| linux-raspi-realtime | — | — |
| linux-raspi2 | — | — |
| linux-realtime | — | — |
| linux-riscv | — | — |
| linux-riscv-5.11 | — | — |
| linux-riscv-5.8 | — | — |
| linux-snapdragon | — | 4.15.0-1120.129 |
References
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