CVE-2021-20263

Name
CVE-2021-20263
Description
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.
NVD Severity
low
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
Mailing List https://www.openwall.com/lists/oss-security/2021/03/08/1
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1933668
CONFIRM https://security.netapp.com/advisory/ntap-20210507-0002/

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* qemu >= 5.0.0 < 5.2.50

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
qemu edge-community 5.2.0-r0 None possibly vulnerable
qemu edge-community 5.1.0-r1 None possibly vulnerable
qemu edge-community 5.0.0-r0 None possibly vulnerable
qemu 3.22-community 5.2.0-r0 None possibly vulnerable
qemu 3.22-community 5.1.0-r1 None possibly vulnerable
qemu 3.22-community 5.0.0-r0 None possibly vulnerable