CVE-2021-20263

EPSS 0.4%CWE-281

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

09 Mar 2021Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

Affected products

n/a · QEMU

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References

https://bugzilla.redhat.com/show_bug.cgi?id=1933668 https://security.gentoo.org/glsa/202208-27 https://security.netapp.com/advisory/ntap-20210507-0002/https://www.openwall.com/lists/oss-security/2021/03/08/1