Improper Preservation of Permissions Affecting qemu package, versions <1:5.2+dfsg-9
Snyk CVSS
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Test your applications- Snyk ID SNYK-DEBIAN12-QEMU-1558357
- published 3 Mar 2021
- disclosed 9 Mar 2021
Introduced: 3 Mar 2021
CVE-2021-20263 Open this link in a new tabHow to fix?
Upgrade Debian:12
qemu
to version 1:5.2+dfsg-9 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream qemu
package and not the qemu
package as distributed by Debian
.
See How to fix?
for Debian:12
relevant fixed versions and status.
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.