Vulnerabilities > CVE-2021-20263 - Improper Preservation of Permissions vulnerability in Qemu

047910
CVSS 3.3 - LOW
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
NONE
Integrity impact
LOW
Availability impact
NONE
local
low complexity
qemu
CWE-281

Summary

A flaw was found in the virtio-fs shared file system daemon (virtiofsd) of QEMU. The new 'xattrmap' option may cause the 'security.capability' xattr in the guest to not drop on file write, potentially leading to a modified, privileged executable in the guest. In rare circumstances, this flaw could be used by a malicious user to elevate their privileges within the guest.

Vulnerable Configurations

Part Description Count
Application
Qemu
20

Common Weakness Enumeration (CWE)