CVE-2021-28711

Katalog CVE

CVSS 6.5 · Medium EPSS 0,33%

Kerentanan pada xen, debian linux. Skor CVSS 3.1 6.5 (Medium) menurut NVD.

Deskripsi (NVD)

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

Rincian

Terbit di NVD

5 Januari 2022

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

6.5 (Medium), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H · uraikan di kalkulator

EPSS (30 hari)

0,33% peluang dieksploitasi; lebih tinggi dari 24,5% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://xenbits.xenproject.org/xsa/advisory-391.txt patch · advisory vendor
• https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html advisory pihak ketiga
• https://www.debian.org/security/2022/dsa-5050 advisory pihak ketiga
• https://www.debian.org/security/2022/dsa-5096 advisory pihak ketiga