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PRIOn knowledge basePRION:CVE-2021-20263HistoryMar 09, 2021 - 6:15 p.m.
Design/Logic Flaw
2021-03-0918:15:00
PRIOn knowledge base
www.prio-n.com
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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.
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