cve-2021-28711
Vulnerability from cvelistv5
Published
2022-01-05 16:10
Modified
2024-08-03 21:47
Severity ?
Summary
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
security@xen.orghttps://lists.debian.org/debian-lts-announce/2022/03/msg00011.htmlThird Party Advisory
security@xen.orghttps://lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlThird Party Advisory
security@xen.orghttps://www.debian.org/security/2022/dsa-5050Third Party Advisory
security@xen.orghttps://www.debian.org/security/2022/dsa-5096Third Party Advisory
security@xen.orghttps://xenbits.xenproject.org/xsa/advisory-391.txtPatch, Vendor Advisory
Impacted products
LinuxLinux
Show details on NVD website

To clipboard 

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