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  2. CVE-2021-20263
ID CVE-2021-20263
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.
References
Vulnerable Configurations
  • cpe:2.3:a:qemu:qemu:5.0.0:-:*:*:*:*:*:*
    cpe:2.3:a:qemu:qemu:5.0.0:-:*:*:*:*:*:*
  • cpe:2.3:a:qemu:qemu:5.0.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:qemu:qemu:5.0.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:qemu:qemu:5.0.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:qemu:qemu:5.0.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:qemu:qemu:5.0.0:rc2:*:*:*:*:*:*
    cpe:2.3:a:qemu:qemu:5.0.0:rc2:*:*:*:*:*:*
  • cpe:2.3:a:qemu:qemu:5.0.0:rc3:*:*:*:*:*:*
    cpe:2.3:a:qemu:qemu:5.0.0:rc3:*:*:*:*:*:*
  • cpe:2.3:a:qemu:qemu:5.0.0:rc4:*:*:*:*:*:*
    cpe:2.3:a:qemu:qemu:5.0.0:rc4:*:*:*:*:*:*
  • cpe:2.3:a:qemu:qemu:5.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:qemu:qemu:5.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:qemu:qemu:5.1.0:-:*:*:*:*:*:*
    cpe:2.3:a:qemu:qemu:5.1.0:-:*:*:*:*:*:*
  • cpe:2.3:a:qemu:qemu:5.1.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:qemu:qemu:5.1.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:qemu:qemu:5.1.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:qemu:qemu:5.1.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:qemu:qemu:5.1.0:rc2:*:*:*:*:*:*
    cpe:2.3:a:qemu:qemu:5.1.0:rc2:*:*:*:*:*:*
  • cpe:2.3:a:qemu:qemu:5.1.0:rc3:*:*:*:*:*:*
    cpe:2.3:a:qemu:qemu:5.1.0:rc3:*:*:*:*:*:*
  • cpe:2.3:a:qemu:qemu:5.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:qemu:qemu:5.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:qemu:qemu:5.2.0:-:*:*:*:*:*:*
    cpe:2.3:a:qemu:qemu:5.2.0:-:*:*:*:*:*:*
  • cpe:2.3:a:qemu:qemu:5.2.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:qemu:qemu:5.2.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:qemu:qemu:5.2.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:qemu:qemu:5.2.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:qemu:qemu:5.2.0:rc2:*:*:*:*:*:*
    cpe:2.3:a:qemu:qemu:5.2.0:rc2:*:*:*:*:*:*
  • cpe:2.3:a:qemu:qemu:5.2.0:rc3:*:*:*:*:*:*
    cpe:2.3:a:qemu:qemu:5.2.0:rc3:*:*:*:*:*:*
  • cpe:2.3:a:qemu:qemu:5.2.0:rc4:*:*:*:*:*:*
    cpe:2.3:a:qemu:qemu:5.2.0:rc4:*:*:*:*:*:*
  • cpe:2.3:a:qemu:qemu:5.2.50:*:*:*:*:*:*:*
    cpe:2.3:a:qemu:qemu:5.2.50:*:*:*:*:*:*:*
CVSS
Base: 2.1 (as of 15-08-2022 - 11:15)
Impact:
Exploitability:
CWE CWE-281
CAPEC
Access
VectorComplexityAuthentication
LOCAL LOW NONE
Impact
ConfidentialityIntegrityAvailability
NONE PARTIAL NONE
cvss-vector via4 AV:L/AC:L/Au:N/C:N/I:P/A:N
Last major update 15-08-2022 - 11:15
Published 09-03-2021 - 18:15
Last modified 15-08-2022 - 11:15
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