CVE-2021-28712
Assigner: XEN
Published: 2022-01-05T16:10:23
State: PUBLISHED
affected: product: Linux
vendor: Linux
versions: status: unknown
version: consult Xen advisory XSA-391
credits: value: {'credit_data': {'description': {'description_data': [{'lang': 'eng', 'value': 'This issue was discovered by Jürgen Groß of SUSE.'}]}}}
descriptions: value: 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
metrics: other: content: description: description_data: value: Potentially malicious PV backends can cause guest DoS due to unhardened
frontends in the guests, even though this ought to have been prevented by
containing them within a driver domain.
type: unknown
problemTypes: descriptions: description: unknown
type: text